| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 600521000 | Detecting R portion of signal waveform | 76 |
| 20080200823 | Mobile Diagnosis Device - The present invention relates to a mobile diagnosis device comprised of an ECG unit ( | 08-21-2008 |
| 20080269627 | Method and Apparatus for Sensing Improvement Using Pressure Data - Method and apparatus for sensing improvement using pressure data. The method and apparatus may be used in an implantable medical device to confirm that an EGM event signifies a true mechanical cardiac activity and not just electrical oversensing. The mechanical activity may be used to create a mechanical marker channel in the implantable medical device. | 10-30-2008 |
| 20090018460 | A Method for Analyzing Irreversible Apneic Coma(IAC) - An method for analyzing irreversible apneic coma (IAC) for determining the presence of irreversible apneic coma (IAC) by analyzing the heart rate variability of a brain traumatic patient, thereby providing a physician a reference index to determine whether brain death has occurred. This method includes, at first, recording an electrocardiogram (ECG) from a subject. Then, analyzing R-R interval in said electrocardiogram (ECG), and plotting said R-R interval into Poincaré plot, wherein the X coordinate in said Poincaré plot represents R-R interval(n), and n is a 1˜data number. Y coordinate in said Poincaré plot represents RR(n+1). And, finally, quantifying said Poincaré plot, and obtaining semi-major axis (SD | 01-15-2009 |
| 20090036788 | SYSTEMS AND METHODS FOR DETECTION OF VT AND VF FROM REMOTE SENSING ELECTRODES - Methods and systems are provided for performing ventricular arrhythmia monitoring using at least two sensing channels that are each associated with different sensing vectors, for example by different pairs of extracardiac remote sensing electrodes. Myopotential associated with each of the sensing channels in monitored, and a ventricular arrhythmia monitoring mode is selected based thereon (e.g., based on determined myopotential levels). Ventricular arrhythmia monitoring is then performed using the selected monitoring mode. | 02-05-2009 |
| 20090076404 | System and methods for analyzing QRS curvature to detect cardiac events - Disclosed is a system for detecting pathophysiological cardiac conditions. The system comprises a diagnostic device that contains electronic circuitry that can detect a cardiac event such as an acute ischemia. The cardiac diagnostic device receives electrical signals from subcutaneous or body surface sensors. The cardiac diagnostic device includes a processor that computes a measure of QRS curvature and applies an ischemia test based on the measure of QRS curvature to determine a likelihood of ischemia. | 03-19-2009 |
| 20090216144 | Hopping methods for the detection of QRS onset and offset - Disclosed are systems and methods for detecting the QRS portion of an electrocardiogram and also for detect QRS onset/offset points. QRS complexes are identified by testing selected waveform samples to determine if they are in a high curvature region. If a region passes the high curvature test, a verification test is applied to adjacent samples to confirm that the region is within a QRS complex. The search for a QRS onset point begins at an adaptive distance from this region. The curvature of selected regions ahead in the search direction is examined. The search moves past all such high curvature regions. The onset point is then located by searching for a region that is “flat” in either of two senses. First, a region may be locally flat (i.e. small first derivative) in an absolute sense. Second, a region is flat in a relative that further movement away from the interior of the QRS (e.g. toward “earlier” samples) does not result in a significant change in the value of the first derivative. The search is performed by hopping through the waveform samples. Once an onset point is located, the search for an offset point proceeds in a similar manner from a starting point that is an adaptively determined distance from the onset point. | 08-27-2009 |
| 20100049070 | DEVICE OF IMPROVING AUTOMATIC REAL-TIME HEART RATE VARIABILITY ANALYSIS USING ACCELEROMETER - The present invention provides a mobile ECG device by using accelerometer to improve real-time automatic analysis of heart rate variability, comprising: a data storage module; a microprocessor (MCU) module in which data are stored and accessed in the data storage module; an analog-to-digital converter module in which the data are transmitted to the microprocessor (MCU) module; an accelerometer peripheral hardware module in which the data are transmitted to the analog-to-digital converter module; and an electrocardiogram peripheral hardware module in which the data are transmitted to the analog-to-digital converter module. | 02-25-2010 |
| 20100130881 | METHOD AND APPARATUS FOR DETECTION OF NERVOUS SYSTEM DISORDERS - Systems and methods for detecting and/or treating nervous system disorders, such as seizures, are disclosed. Certain embodiments of the invention relate generally to implantable medical devices (IMDs) adapted to detect and treat nervous system disorders in patients with an IMD. Certain embodiments of the invention include detection of seizures based upon comparisons of long-term and short-term representations of physiological signals. Other embodiments include prediction of seizure activity based upon analysis of physiological signal levels. An embodiment of the invention monitors the quality of physiological signals, and may be able to compensate for signals of low signal quality. A further embodiment of the invention includes detection of seizure activity following the delivery of therapy. | 05-27-2010 |
| 20100191133 | METHODS FOR QUANTIFYING QT-RR - Methods and apparatus for determining a patient specific QT-RR curve. One embodiment of a method in accordance with the technology comprises providing electrophysiological data for a specific patient. The method can further include: (a) determining QT durations and RR values for a plurality of heart beats of the specific patient from the electrophysiological data; (b) ascertaining effective RR intervals for the plurality of heart beats by weight-averaging the RR values according to the equation Effective RR | 07-29-2010 |
| 20100191134 | METHOD FOR IDENTIFYING AN R-WAVE IN AN ECG SIGNAL, ECG MEASURING DEVICE AND MAGNETIC RESONANCE SCANNER - A method for identifying R-waves in an ECG signal for the purpose of triggering further measurements or examinations is proposed. A reference ECG signal by an ECG measuring device is measured. An R-wave in the reference ECG signal is identified. A reference quantity is determined from the reference ECG signal. The reference ECG signal assumes in a time interval that starts before the R-wave of the ECG signal and lasts at a maximum up to the occurrence of the R-wave. A comparison rule is generated based on the reference quantity. ECG signals are measured in which R-waves are to be identified. The measured ECG signals are compared with the reference quantity based on the comparison rule. A trigger signal is outputted based on a positive result of the comparison. | 07-29-2010 |
| 20100286542 | Heart Electrophysiological Signal Analysis System - A system automatically detects and measures ST deviation of a heart wave ECG signal in the presence of noise and accommodates baseline variation of the signal and other artefacts. A system identifies a particular point in an electrophysiological signal representing heart electrical activity using an interface for receiving an electrical signal waveform comprising an R-wave and including an ST segment portion associated with heart electrical activity of a patient over a heart beat cycle. A signal processor processes data representing the electrical signal waveform by identifying an S point and T point in the electrical signal waveform and determining a first candidate J point in the electrical signal waveform having substantially a maximum distance from a line between the identified S and T points, the distance being measured perpendicularly to the line. | 11-11-2010 |
| 20100305462 | SYSTEM AND METHOD FOR SYNCHRONIZING ENERGY DELIVERY TO THE CARDIAC RHYTHM - A system for synchronizing application of treatment signals with a cardiac rhythm is provided. The system includes a memory that receives and stores a synchronization signal indicating that a predetermined phase such as R-wave of a cardiac rhythm of a patient has started. A synchronization module analyzes whether the stored synchronization signal is erroneous and if so, prevents a medical treatment device from applying a treatment energy signal such as an IRE pulse to a patient to take into account an irregular heart beat and noise in the synchronization signal in order to maximize safety of the patient. | 12-02-2010 |
| 20110137194 | RR INTERVAL BASED BEAT REJECTION FOR A CARDIAC MONITOR - Disclosed is a system for the detection of cardiac events (a guardian system) that includes an implanted device called a cardiosaver, a physician's programmer and an external alarm system. The system is designed to provide early detection of cardiac events such as acute myocardial infarction or exercise induced myocardial ischemia caused by an increased heart rate or exertion. The system can also alert the patient with a less urgent alarm if a heart arrhythmia is detected. Using one or more detection algorithms, the cardiosaver can detect a change in the patient's electrogram that is indicative of a cardiac event within five minutes after it occurs and then automatically warn the patient that the event is occurring. To provide this warning, the guardian system includes an internal alarm sub-system (internal alarm means) within the cardiosaver and/or an external alarm system (external alarm means). If the guardian system is put into a pacemaker, the algorithm can utilize a different analysis of the electrogram depending on whether or not the pacemaker is actually pacing the heart. | 06-09-2011 |
| 20110251507 | Method, Computer Readable Medium, and System for Analyzing ECG Morphology and Time Series - A method and apparatus for analyzing the QT interval characteristics of ECG signal data having a succession of waveforms produced by the beating of the heart. ECG signal data is obtained from a patient. The R-R interval and the QT intervals of the waveforms of the ECG signal data are determined. Waveforms of the ECG signal data having a stable heart rate are selected for use in determining the QT interval characteristics. Preferably, the waveforms selected are those having minimum R-R interval standard deviation and minimum R-R interval dispersion. The QT correction (QTc) is computed from the ECG signal data waveforms selected in the foregoing manner or on the basis of clinician editing. The R-R intervals, the QT intervals, and QTc for the heart beats of the selected waveforms are displayed for analysis and diagnosis purposes. The invention can also be used, in an analogous manner, to obtain and display other cardiac data from the ECG waveforms. | 10-13-2011 |
| 20110270111 | METHOD AND APPARATUS FOR ASSESSMENT OF FLUID RESPONSIVENESS - Disclosed embodiments include a method for assessing fluid responsiveness implemented in a medical apparatus, a medical system, or a digital computer with one or more processors comprising: (a) measuring an electrocardiogram signal, and (b) computing a dynamic index predictive of fluid responsiveness from said electrocardiogram by calculating the R-wave amplitude variability over one or more respiratory cycles. According to one particular embodiment, the ECG changes in R-wave amplitude are calculated from the DII lead to generate a dynamic index to guide fluid therapy. | 11-03-2011 |
| 20110319780 | Method for identifying a characteristic profile of an R-wave in an EKG signal and a computer program product as well as an electronically readable data medium for performing the method - A method for identifying a characteristic profile of an R-wave in an EKG signal is proposed. A temporal sequence of measurement values is recorded and stored with associated time value. A number of values for identified temporal derivative and their respective time values is identified in the stored measurement values. One of the values for identified temporal derivative is selected as an exemplary value. The selection includes at least one plausibility test. A sub-sequence of the stored measurement values is selected as a characteristic profile as a function of the time value associated with the exemplary value. The combination of identifying possible values by their derivative with a plausibility test makes the method particularly robust. | 12-29-2011 |
| 20120004568 | Method for identifying R waves in an ECG signal and an ECG measuring instrument as well as a magnetic resonance device - A method for identifying R waves in an ECG signal is proposed. An ECG measuring instrument measures ECG signals of a patient in which R waves are to be detected. The measured ECG signals are compared with respective reference quantities based on at least two comparison rules. The second comparison rule is dependent on a result of a first comparison conducted according to a first comparison rule. A signal that an R wave has been detected is issued if the first and the second comparison rules are fulfilled. Making the second comparison rule dependent on the result of the first comparison rule enables an adept response to changes of measurement conditions. These changes can be taken into account in further comparisons. Therefore the detection of R waves in an ECG signal can be optimized, leading to an improvement in the image quality in ECG-triggered MR examinations. | 01-05-2012 |
| 20120004569 | Method for Generating a Trigger Signal by an EKG Signal as Well as an EKG Measuring Apparatus and a Magnetic Resonance Device - A method for generating a trigger signal for a magnetic resonance measurement by an R wave of an EKG signal is proposed. The EKG signal is captured by an algorithm manager. The algorithm manager includes at least a first trigger instance having a trigger algorithm. EKG signals from at least two different EKG channels are processed by the trigger algorithm. The algorithm manager includes at least a further trigger instance for capturing the EKG signal. The further trigger instance has at least one further trigger algorithm for processing EKG signals from at least two different EKG channels. The trigger signal is generated by selecting a trigger instance from the different trigger instances. | 01-05-2012 |
| 20120277608 | AUTOMATIC DETECTION OF PREMATURE VENTRICULAR COMPLEXES FOR HEART RATE TURBULENCE MEASUREMENTS - A medical device system and method for monitoring a cardiac signal in a patient senses ventricular R-waves and computes a morphology metric of an R-wave and a corresponding preceding morphology metric of a preceding R-wave. One of a difference and a ratio of the R-wave morphology metric and the preceding R-wave morphology metric is compared to an established detection threshold for discriminating premature ventricular contractions from premature atrial contractions. A cardiac signal measurement is computed from the sensed R-waves in response to detecting a premature ventricular comparison based on the comparison. | 11-01-2012 |
| 20120277609 | DISTINGUISHING PREMATURE CONTRACTIONS IN A MEDICAL DEVICE - A method and device of distinguishing premature contractions that includes a sensor sensing cardiac signals, and a processor configured to determine a plurality of intervals in response to the sensed cardiac signal, detect a premature contraction being associated with a first R-wave of the plurality of R-waves, determine whether a metric of the first R-wave is greater than a premature contraction threshold, and identify the detected premature contraction as one of a premature atrial contraction or a premature ventricular contraction in response to determining whether a metric of the first R-wave is greater than a premature contraction threshold. | 11-01-2012 |
| 20120277610 | DISTINGUISHING PREMATURE CONTRACTIONS IN A MEDICAL DEVICE - A method and device of distinguishing premature contractions that includes a sensor sensing cardiac signals, and a processor configured to determine a plurality of R-waves in response to the sensed cardiac signal, detect a premature contraction being associated with a first R-wave of the plurality of R-waves, determine a first area of the detected first R-wave, compare the determined first area to an area threshold, and identifying the detected premature contraction as one of a premature atrial contraction or a premature ventricular contraction in response to the comparing. | 11-01-2012 |
| 20120277611 | DISTINGUISHING PREMATURE CONTRACTIONS IN A MEDICAL DEVICE - A method and device of distinguishing premature contractions that includes a sensor sensing cardiac signals, and a processor configured to determine a plurality of R-waves in response to the sensed cardiac signal, detect a premature contraction being associated with a first R-wave of the plurality of R-waves, determining a first area of the detected first R-wave, determine a second area of a second R-wave, determine a ratio of the first area and the second area, compare the ratio to a ratio threshold, and identify the detected premature contraction as one of a premature atrial contraction or a premature ventricular contraction in response to the comparing.. | 11-01-2012 |
| 20120323131 | SYSTEM, METHOD AND RECORDING MEDIUM FOR CALCULATING PHYSIOLOGICAL INDEX - A system, a method and a recording medium for calculating a physiological index are provided. The method includes: dividing a physiological data sequence into a plurality of windows; analyzing a data segment in each window to obtain metadata that represents data characteristics of the data segment; updating the metadata including the data characteristics of all data segments in the windows up to a previous window by using the metadata corresponding to one of the windows to obtain the metadata including the data characteristics of all data segments in the windows up to a current window; and finally, calculating the physiological index by using the updated metadata. | 12-20-2012 |
| 20120330173 | APPARATUS AND METHOD FOR OBTAINING BIOMETRIC INFORMATION OF DRIVER - An apparatus for obtaining biometric information of driver is provided. The apparatus includes a first biometric-signal-sensing unit that is installed in the steering wheel of an automobile and senses a driver's biometric signal therefrom. Additionally, a second biometric-signal-sensing unit is installed in the driver's seat of the automobile and also simultaneously senses a driver's biometric signal. As a means of control, a controller obtains biometric information selectively using biometric signals which satisfy a preset condition in obtaining biometric information based on biometric signals sensed by the first biometric-signal-sensing unit and biometric signals sensed by the second biometric-signal-sensing unit. | 12-27-2012 |
| 20130023779 | Method and System for Ischemia Detection - Disclosed herein are systems and methods for automatically determining ST windows for ischemia detection. In one example, an R-wave is identified in a signal derived from an IEGM and the derivative signal data following the identified R-wave is analyzed so as to find portions of the derivative signal comprising samples having lower values than a predetermined threshold. Further, a portion of the derivative signal including samples having lower values than the threshold is determined to correspond to a ST window for that cardiac cycle if that portion fulfills predetermined requirements. A reference ST window based on a number of determined ST windows is determined. Using the reference ST window, ischemia can be detected by comparing IEGM data in the reference ST window with current IEGM data from a segment of the IEGM signal corresponding to the reference ST window. | 01-24-2013 |
| 20130030315 | DEVICES, SYSTEMS AND METHODS TO MONITOR AND TREAT HEART FAILURE (HF) - Described herein are implantable systems and devices, and methods for use therewith, that can be used to monitor and treat heart failure (HF). Such implantable systems preferably includes a lead having at least two electrodes implantable in a patient's left ventricular (LV) chamber. A plurality of different sensing vectors are used to obtain a plurality of IEGMs each of which is indicative of an evoked response at a corresponding different region of the LV chamber. For each of the IEGMs, there is a determination of one or more evoked response metrics indicative of a localized cardiac function at the corresponding region of the LV chamber. The evoke response metrics can be, e.g., paced depolarization integral (PDI) and/or maximum upward slope of an R-wave, but are not limited thereto. The patient's HF condition is monitored based on the localized cardiac function at the plurality of different regions of the LV chamber as determined based on the one or more evoked response metrics determined for each of the IEGMs. | 01-31-2013 |
| 20130041275 | SYSTEM, APPARATUS AND METHOD FOR DIAGNOSING SEIZURES - Systems and methods can be used to help discriminate between epileptic and non-epileptic seizures based on a relationship between the postictal heart electrical activity and the preictal heart electrical activity. Also disclosed is an approach to determine an R-R interval by using a time-invariant complex wavelet transform. | 02-14-2013 |
| 20130041276 | METHOD AND SYSTEM FOR AUTOMATICALLY DETECTING AND ANALYZING PEDIATRIC ECGs - Related to a method and system for automatically detecting and analyzing pediatric ECGs, the invention comprises a signal acquisition system, a lead number determination module, a QRS wave positioning module, a P and T wave positioning module, a template and waveform analysis module, an automatic comparison module and a display and print module. The invention is a computer-aided analysis to the electrocardiograms of pediatric patients under the age of 16, applicable to the electrocardiograms of children acquired by different numbers of leads, and can be more widely used in clinical application. Moreover, the invention adopts the combined single-lead and multi-lead method to position the easily interfered characteristic points of P, QRS and T waves of pediatric ECGs. Therefore, this method can avoid the errors caused by single-lead calculation, guarantee the accuracy of parameter calculation, and consequently guarantee the accuracy of final automatic analysis results. | 02-14-2013 |
| 20130116587 | DETECTION OF DRASTIC BLOOD PRESSURE CHANGES - A cardiac-activity based prediction of a rapid drop in a patient's blood pressure during extracorporeal blood treatment is disclosed. A proposed alarm apparatus includes a primary beat morphology analysis unit bank of secondary analysis units and an alarm generating unit. The primary beat morphology analysis unit discriminates heart beats in a received basic electrocardiogram signal, classifies each beat into one out of at least two different beat categories, and associates each segment of the signal with relevant event-type data. The event-type data and the basic electrocardiogram signal together form an enhanced electrocardiogram signal, based upon which the primary beat morphology analysis unit determines whether one or more secondary signal analyses should be performed. Depending on the enhanced electrocardiogram signal's properties, the bank of secondary analysis units performs none, one or more of up to at least two different types of secondary analyses, and for each analysis performed produces a respective test signal. The alarm generating unit receives the test signals, and triggers an alarm signal indicative of an estimated rapid blood pressure decrease, if at least one alarm criterion is fulfilled. | 05-09-2013 |
| 20130116588 | System and Method for the Analysis of Electrocardiogram Signals - A microprocessor configured to receive and process digitized signals derived from an analogue ECG signal is provided. An example microprocessor comprises a beat detection unit configured to receive the in-phase and quadrature phase band power signals, calculate a band power value and an adaptive threshold value, and compare said band power value with said adaptive threshold value to detect a QRS complex of the ECG signal indicative of a detected valid beat; and an R peak detection unit configured to receive the digital ECG signal and information about the detected valid beat, select a portion of the received ECG signal as a first time window around the detected valid beat; determine the location of a first R peak position; and perform a time domain search in a second time window around said first R peak position in order to refine the location of an R peak position. | 05-09-2013 |
| 20130144181 | MEASUREMENTS OF FATIGUE LEVEL USING HEART RATE VARIABILITY DATA - Methods, apparatuses, and systems for quantifying fatigue of a subject are disclosed. The methods may include measuring an electrocardiogram (ECG) signal from the subject. The methods may further include calculating, with a processing device, a Heart Rate Variability (HRV) metric in response to the ECG signal. The methods may additionally include calculating, with a processing device, a fatigue level in response to the HRV metrics. | 06-06-2013 |
| 20130150743 | HEARTBEAT SIGNAL PROCESSOR AND HEARTBEAT SIGNAL PROCESSING METHOD - A heartbeat signal processor includes a first and second electrodes to obtain a first and second heartbeat signals, a DC voltage calculating unit and an AC amplitude calculating unit to calculate first and second average DC voltage values of direct-current components and first and second average AC amplitude values of alternate-current components in the first and second heartbeat signals, a correlation coefficient calculating unit to calculate a correlation coefficient between the alternate-current components in the first and second heartbeat signals, an amplification factor setting unit to set an amplification factor on the basis of the first and second average DC voltage values, the first and second average AC amplitude values, and the correlation coefficient, and a signal generating unit to generate a differential heartbeat signal by amplifying the first or second heartbeat signal on the basis of the amplification factor and calculating a difference between the first and second heartbeat signals. | 06-13-2013 |
| 20130165805 | R-PEAK DETECTION APPARATUS AND CONTROL METHOD THEREOF - A method of controlling of an R-peak detection apparatus, which detects an R-peak from an ElectroCardioGram (ECG) signal, includes receiving the ECG signal, reading out a pre-stored ECG template, comparing the EG signal with the pre-stored ECG template to determine a similarity between the ECG signal and the pre-stored ECG template and determining whether the similarity is equal to or greater than a threshold value, and determining a corresponding interval as the R-peak when the similarity is equal to or greater than the threshold value. | 06-27-2013 |
| 20130190635 | CALIBRATION METHOD OF ELECTROCARDIOGRAM SIGNALS AND THE APPLICATION PROGRAM FOR THE SAME - A calibration method of electrocardiogram signals and the application program for the same. The method comprises steps of receiving an uncalibrated/unidentified electrocardiogram signal of a user, calculating the ratio of the distance length of an uncalibrated/unidentified electrocardiogram signal and the distance length of an electrocardiogram template, then generating a trigonometric value which corresponds with a trigonometric projection degree according to the ratio. Next step is to set a characteristic point of the uncalibrated electrocardiogram signal as an axis anchor point of the trigonometric projection for attaining a displacement. Lastly, perform the calibration on the unidentified electrocardiogram signal according to the generated trigonometric value which corresponds with trigonometric projection degree and the attained displacement. Then perform identification comparison of the unidentified electrocardiogram signal and the saved electrocardiogram template for further authorization. | 07-25-2013 |
| 20130190636 | OPTIMIZATION OF LV AND RV LEAD PLACEMENT BASED ON ELECTRICAL DELAYS - A system comprises a cardiac signal sensing and a processing circuit. The cardiac signal sensing circuit senses a first cardiac signal segment that includes a QRS complex and a second cardiac signal segment that includes a fiducial indicative of local ventricular activation. The processor circuit includes a site activation timer circuit configured to determine a time duration between a fiducial of the QRS complex of the first cardiac signal segment and the fiducial of the second cardiac signal segment. The processor circuit is configured to generate, using the determined time duration, an indication of optimality of placement of one or more electrodes for delivering therapy and provide the indication to at least one of a user or process. | 07-25-2013 |
| 20130190637 | System for Monitoring and Diagnosis of Cardiac Electrogram Signals Using Multi-Dimensional Analysis - An analyzer automatically analyzes both, a common portion of multiple successive heart cycles of electrophysiological signal data synchronized with respect to a P wave and a common portion of multiple successive heart cycles of the signal data synchronized with respect to an R wave, to identify changes occurring in amplitude value and time duration of the common portion of the multiple successive heart cycles of the signal data. A display processor initiates generation of at least one display image showing the common portion of the multiple successive heart cycles synchronized in time, adjacent and mutually vertically displaced to facilitate visual comparison and highlighting an identified change by a visual attribute. | 07-25-2013 |
| 20130190638 | MOTION AND NOISE ARTIFACT DETECTION FOR ECG DATA - Technologies are provided herein for real-time detection of motion and noise (MN) artifacts in electrocardiogram signals recorded by electrocardiography devices. Specifically, the present disclosure provides techniques for increasing the accuracy of identifying paroxysmal atrial fibrillation (AF) rhythms, which are often measured via such devices. According to aspects of the present disclosure, a method for detecting MN artifacts in an electrocardiogram (ECG) recording includes receiving an ECG segment and decomposing the received ECG segment into a sum of intrinsic mode functions. The intrinsic mode functions associated with MN artifacts present within the ECG segment are then isolated. The method further includes determining randomness and variability characteristic values associated with the isolated intrinsic mode functions and comparing the randomness and variability characteristic values to threshold randomness and variability characteristic values. If the randomness and variability characteristic values exceed the threshold characteristic values, the ECG signal is determined to include MN artifacts. | 07-25-2013 |
| 20130231578 | ELECTROCARDIOGRAM ANALYSIS REPORT, ELECTROCARDIOGRAM ANALYSIS APPARATUS, AND ELECTROCARDIOGRAM ANALYSIS PROGRAM - An electrocardiogram analysis report simultaneously displays an electrocardiogram waveform collected from a subject and information about a measurement value calculated from the electrocardiogram waveform. The electrocardiogram analysis report includes a frontal plane display region configured to display a limb leads waveform included in the electrocardiogram waveform and information about a measurement value calculated from the limb leads waveform, and a horizontal plane display region configured to display a chest lead waveform included in the electrocardiogram waveform and information about a measurement value calculated from the chest lead waveform, wherein the information about the measurement value is displayed at a position spaced apart by a distance corresponding to a size of the measurement value in a direction from a predetermined center point to the relevant lead waveform in the frontal plane display region and the horizontal plane display region. | 09-05-2013 |
| 20130237874 | Real Time QRS Detection Using Adaptive Threshold - A mobile system for analyzing ECG data includes an analog front end module coupled to a mobile consumer device. The analog front end module is configured to collect ECG data from one or more leads and is operable to convert the analog ECG data to digital ECG data. The mobile consumer device is coupled to receive the digital ECG data, and is configured to perform QRS detection using a filter whose cutoff frequency is adapted to noise level in real time. The ECG signal is amplified non-linearly and three windowed threshold signals (D, E, J) are derived. The cutoff frequency for the QRS detection is dynamically selected as a function of the threshold signals. A sample in the amplified signal is identified to be a heart beat point only when the sample value is equal to the first threshold signal and greater than the filtered threshold signal. | 09-12-2013 |
| 20130245477 | R-Wave Detection Method - A method for detecting an R-wave from an ECG signal (x(t)) derived from a living body, the method comprising the steps of (a) acquiring the ECG signal from the living body, (b) digitizing the ECG signal into a digital ECG signal (x(t | 09-19-2013 |
| 20130245478 | Adaptive Cardiac Data Patient Filter System - A system for adaptively processing patient monitoring signals comprises an input processor for acquiring a signal having amplitude representing electrical activity of a patient heart over time. A signal processor identifies different portions of the signal associated with different phases of cardiac activity by, inverting the signal to provide an inverted signal, aligning the signal and the inverted signal in amplitude during a cardiac rest portion and identifying one or more of the different portions in response to an intersection point of the signal and the inverted signal. Multiple adaptive signal filters are used to filter multiple bandwidths of corresponding different portions of the signal. | 09-19-2013 |
| 20130245479 | APPARATUS AND METHOD FOR REMOVING NOISE FROM BIOSIGNALS - Disclosed are an apparatus and a method for removing noise from biosignals. An embodiment of the invention provides an apparatus for removing noise from biosignals measured for a particular period of time that includes: a similarity calculating unit configured to calculate a similarity between any one biosignal from among the biosignals and other biosignals; and a noise removal unit configured to remove noise from the any one biosignal by using the similarity. Aspects of the invention provide the advantage of effectively removing noise from biosignals without distorting the waveforms of the biosignals. | 09-19-2013 |
| 20130245480 | HEART MONITORING APPARATUS - An electrocardiographic device for sensing cardiac activity in a user, the electrocardiographic device comprising: plurality of electrodes provided at a surface of the device for electrical engagement with a pair of extremities of a user; one or more movement sensors arranged to, in use, detect movement of a user's extremities; and a control unit configured to receive electrical signals from the electrodes and to, in use, process said signals in dependence on the output of the one or more movement sensors so as to filter variations from the signals due to movement of the user's extremities. | 09-19-2013 |
| 20130261481 | SYSTEMS AND METHODS FOR ST SEGMENT STABILITY DISCRIMINATION DURING CARDIAC ISCHEMIA DETECTION FOR USE WITH IMPLANTABLE MEDICAL DEVICES - Techniques are provided for discriminating episodes of cardiac ischemia indicated based on shifts in ST segment elevation from false detections due to atrial fibrillation (AF) or other confounding factors such as premature ventricular contractions (PVCs.) In an example for use with a single-chamber device, in response to a possible ischemic event, the single-chamber device assesses ventricular stability based an examination of ventricular intracardiac electrogram (IEGM) signals. If the ventricular IEGM is unstable due to paroxysmal AF or frequent PVCs, the ischemic event is rejected as a false detection. Otherwise, the device responds to the event by, for example, generating warning signals, recording diagnostic data or controlling device therapy. The stability discrimination techniques are particularly advantageous for use within single-chamber devices that lack automatic mode switching but are also beneficial within at least some dual-chamber devices or multi-chamber systems. | 10-03-2013 |
| 20130261482 | SYSTEMS AND METHODS FOR ECG MONITORING - A method, system, apparatus and device for processing an ECG signal to remove or reduce noise from the ECG signal attributable to EMG and/or motion artifacts. The novel algorithm common to all aspects of the device can include wavelet decomposing an ECG signal to produce a set of approximation coefficients and a plurality of sets of detail coefficients, locally fitting subsets of the set of approximation coefficients to second order polynomials, adjusting the set of approximation coefficients by the locally fitted second order polynomials, setting some of the detail coefficients to zero, and reconstructing an ECG signal with reduced noise based on the modified set of approximation coefficients and the modified plurality of sets of detail coefficients. | 10-03-2013 |
| 20130289428 | METHOD AND APPARATUS FOR DISPLAY OF CARDIAC SIGNAL EPISODES WITH OVER- OR UNDER-SENSING - A medical device system senses cardiac signals and generates and stores sensing data including sensed cardiac events. A processor receiving the sensing data is configured to detect undersensed and oversensed events. The processor generates an episode display comprising event identifying codes in response to the received sensing data and produces an adjusted episode display in response to an event being identified as an undersensed event or an oversensed event. | 10-31-2013 |
| 20130338519 | Apparatus and Method for Measuring Physiological Signal Quality - An apparatus and method for determining a signal quality of an input signal representing a repetitious phenomena derived from at least one sensor connected to a patient is provided. A detector receives the input signal and determines data representing the repetitious phenomena from the input signal for use in determining at least one patient parameter. A measurement processor is electrically coupled to the detector that determines a first signal quality value by identifying at least one feature of the repetitious phenomena data and compares the at least one feature of a first set of the determined repetitious phenomena data with a second set of the determined repetitious phenomena data to determine a feature variability value and using the feature variability value to determine a stability value representative of the quality of the input signal. | 12-19-2013 |
| 20140031709 | APPARATUS AND METHOD FOR IDENTIFYING MYOCARDIAL ISCHEMIA USING ANALYSIS OF HIGH FREQUENCY QRS POTENTIALS - Detecting cardiac ischemia by detecting local changes in high frequency ECG parameters. Local changes may be, for example, local reduction in RMS of high frequency components, for example, during a stress test. | 01-30-2014 |
| 20140058280 | Health Monitoring - Health monitoring devices allow for monitoring of the vital signs of a subject. Wireless devices can enable a subject's cardiac and/or respiratory functions to be monitored remotely, e.g. without the subject being attached to bedside equipment. A cardiac monitoring device may include a substrate, electrodes for measuring ECG signals, and an electronics module including a data processor and a wireless transmitter. The electronics module is sealed within the substrate and arranged to receive the measured ECG signals. Each ECG signal associated with a heartbeat is processed in the data processor to provide key data relating to that heartbeat. The key data may include the temporal position of a characteristic feature in the ECG signal. The key data is provided to the wireless transmitter for transmission. | 02-27-2014 |
| 20140073982 | R-R INTERVAL MEASUREMENT USING MULTI-RATE ECG PROCESSING - A method and system for R-R interval measurement of a user are disclosed. In a first aspect, the method comprises detecting an electrocardiogram (ECG) signal of the user. The method includes performing QRS peak detection on the ECG signal to obtain a low resolution peak and searching near the low resolution peak for a high resolution peak. The method includes calculating the R-R interval measurement based upon the high resolution peak. In a second aspect, a wireless sensor device comprises a processor and a memory device coupled to the processor, wherein the memory device includes an application that, when executed by the processor, causes the processor to carry out the steps of the method. | 03-13-2014 |
| 20140088450 | METHOD AND SYSTEM FOR DETERMINING QRS COMPLEXES IN ELECTROCARDIOGRAM SIGNALS - A system automatically detects peaks in signal by generating a zero-mean data sequence of the signal comprising a data sequence and filtering the zero-mean data sequence. The entropy of the filtered data sequence is determined and peaks are detected in the entropy data sequence. | 03-27-2014 |
| 20140107513 | INTERNET-BASED SYSTEM FOR EVALUATING ECG WAVEFORMS TO ESTIMATE THE DEGREE OF CORONARY BLOCKAGE - The present invention provides an improved, Internet-based system that seamlessly collects cardiovascular data from a patient before, during, and after a procedure for EP or an ID. During an EP procedure, the system collects information describing the patient's response to PES and the ablation process, ECG waveforms and their various features, HR and other vital signs, HR variability, cardiac arrhythmias, patient demographics, and patient outcomes. Once these data are collected, the system stores them on an Internet-accessible computer system that can deploy a collection of user-selected and custom-developed algorithms. Before and after the procedure, the system also integrates with body-worn and/or programmers that interrogate implanted devices to collect similar data while the patient is either ambulatory, or in a clinic associated with the hospital. A data-collection/storage module, featuring database interface, stores physiological and procedural information measured from the patient. | 04-17-2014 |
| 20140142450 | SLEEP APNEA DETECTION SYSTEM AND METHOD - The invention provides a sleep apnea detection system and method. The system includes a detecting module, a processing module, a converting module and a determining module. The detecting module detects a plurality of peak time points of R-waves in an ECG (electrocardiograph) signal. The processing module calculates areas of the R-waves at a predetermined time range based on the peak time points, so as to produce a plurality of first R-wave area signals based on the areas and generate an EDR (ECG Derived Respiration) signal based on the peak time points and the first R-wave area signals. The converting module converts the EDR signal to a frequency signal. The determining module determines whether a maximum peak frequency of the frequency signal is at a first frequency segment or a second frequency segment to determine the frequency signal being an apnea signal or a normal breathing signal. | 05-22-2014 |
| 20140155772 | VALIDITY TEST ADAPTIVE CONSTRAINT MODIFICATION FOR CARDIAC DATA USED FOR DETECTION OF STATE CHANGES - Methods, systems, and apparatus for quantifying the quality of a fiducial time marker for a candidate heart beat, quantifying the quality of a candidate heart beat, or determining a time of beat sequence of the patient's heart. A fiducial time marker is obtained for a candidate heart beat. A quality index of said candidate heart beat is set to a first value. The candidate heart beat is tested with at least one beat validity test. At least a second value is added to said quality index of said candidate heart beat if said candidate heart beat passes said at least one beat validity test. The candidate heart beat is tested with at least a second heart beat validity test. At least a third value is added to said quality index of said candidate heart beat if said candidate heart beat passes said at least second heart beat validity test. In one class of beat validity test, a constraint defining a pass is modified at one or more times after the most recent prior valid heart beat that is greater than a constraint modification time threshold | 06-05-2014 |
| 20140187991 | ARTIFACT CANCELLATION TO SUPPRESS FAR-FIELD ACTIVATION DURING ELECTROPHYSIOLOGY MAPPING - A method for mapping a cardiac chamber includes sensing activation signals of intrinsic physiological activity with a plurality of electrodes disposed in or near the cardiac chamber, the activation signals including a near-field activation signal component and a far-field activation signal component, isolating R-wave events in the activation signals, generating a far-field activation template representative of the far-field activation signal component based on the R-wave events, and filtering the far-field activation template from the activation signals to identify the near-field activation signal components in the activation signals. | 07-03-2014 |
| 20140236034 | METHOD FOR THE DETECTION OF SUBCUTANOUS CARDIAC SIGNALS AND A CARDIAC DEVICE FOR USE IN DETECTING SUBCUTANEOUS CARDIAC SIGNALS - A cardiac device and method for detecting QRS signals within a composite heart signal of a body including providing at least two input heart signals via at least two separate input channels, wherein each of the at least two input heart signals is recorded by pairs of sensing electrodes that have one electrode in common and provided coincidental in time. The cardiac device and method include generating estimated signals from the input heart signals, combining the input heart signals and the estimated signals to a combined input stream (SECG), and detecting the QRS signal by comparing the combined input stream (SECG) to an adaptive detection threshold (ATHR) which adapts throughout time. | 08-21-2014 |
| 20140249438 | ELECTRONIC DEVICE, INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD AND PROGRAM - An exemplary electronic device is in a housing to be gripped by a right hand and a left hand of a user, and has a plurality of manipulable portions. The electronic device includes: electrodes placed at positions which come in contact with the right hand and left hand of the user gripping the housing; an extractor for extracting an electrocardiographic component of the user from a potential difference between the electrodes; a determination section for determining whether the extracted electrocardiographic component is in a positive direction or a negative direction by referring to a prestored criterion; and a change section for, in accordance with a result of determination by the determination section, changing assignment between each of the plurality of manipulable portions and a manipulation signal generated in response to a manipulation. | 09-04-2014 |
| 20140249439 | R-Wave Detection Method - A method for detecting an R-wave from an ECG signal derived from a living body, the ECG signal including a plurality of ECG channel signals, the method comprising the steps of providing a plurality of channel R-wave detectors each processing a distinct signal of the plurality of channel ECG signals to generate a distinct channel trigger signal of a plurality of channel trigger signals, and inputting each channel trigger signal into a composite R-wave detector to generate a composite R-wave trigger, whereby the composite R-wave detector more accurately detects R-waves than each of the plurality of channel R-wave detectors. | 09-04-2014 |
| 20140336522 | INFORMATION PROCESSING APPARATUS AND REPRESENTATIVE-WAVEFORM GENERATING METHOD - A handheld terminal includes an electrocardiographic-signal dividing module that divides a biosignal into waveforms of a fixed interval, an R-R interval calculating module that calculates a plurality of R-R intervals indicative of an interval between adjacent R-waves and calculates an average value of the calculated R-R intervals for each of the waveforms of the fixed interval divided, and a candidate-waveform selecting module that selects a plurality of waveforms of a fixed interval corresponding to average values indicating near a maximum value of frequency of average values using the average value of the R-R intervals calculated for each of the waveforms of the fixed interval calculated, and thus highly accurate representative waveform data can be generated. | 11-13-2014 |
| 20140350423 | IMPLANTABLE CARDIAC DEVICE SENSING WITH REFRACTORY PERIOD ALIGNMENT TO SIGNAL PEAK - Methods and devices for addressing difficulty with cardiac event sensing that can arise if the starting point of the cardiac cycle is not well aligned to the intended starting point of a detection profile used for sensing. As an improvement, illustrative methods and devices provide an addition to cardiac sensing operations by adjusting the starting point of a detection profile to align with a desired point in the cardiac signal. | 11-27-2014 |
| 20150018701 | Apparatus and Display Methods Relating to Intravascular Placement of a Catheter - An integrated catheter placement system for accurately placing a catheter within a patient's vasculature is disclosed. In one embodiment, the integrated system comprises a system console, a tip location sensor for temporary placement on the patient's chest, and an ultrasound probe. The tip location sensor senses a magnetic field of a stylet disposed in a lumen of the catheter when the catheter is disposed in the vasculature. The ultrasound probe ultrasonically images a portion of the vasculature prior to introduction of the catheter. ECG signal-based catheter tip guidance is included in the integrated system to enable guidance of the catheter tip to a desired position with respect to a node of the patient's heart. Various aspects for visualizing and manipulating display of the ECG signal data acquired via the present system, together with aspects of various ECG sensor configurations, are also disclosed. | 01-15-2015 |
| 20150025403 | MOOD ANALYSIS METHOD, SYSTEM, AND APPARATUS - In a mood analysis method using an electrocardiogram of a user, RR intervals in the electrocardiogram are computed, and low-frequency (LF) values and high-frequency (HF) values are also computed according to the RR intervals. Standard values of sympathetic nervous system (SNS) activity and parasympathetic nervous system (PSNS) activity are acquired corresponding to age and sex data of the user, to establish a mood display coordinate system. Coordinates of the LF values and the HF values in the mood display coordinate system are computed to determine a mood of the user. | 01-22-2015 |
| 20150045683 | ELECTROCARDIOGRAPHY SIGNAL EXTRACTION METHOD - An electrocardiography signal extraction method includes receiving an electrocardiography signal, detecting a peak of a wave of the electrocardiography signal, separating the wave into left and right waves, normalizing the left wave and a plurality of scales of Gaussian, comparing the normalized left wave with a left part of the normalized scales of Gaussian, acquiring a left part error function, indicating a left minimum comparative error, selecting a left scale of Gaussian with the left minimum comparative error, obtaining a left duration of the wave, normalizing the right wave, comparing the normalized right wave with a right part of the normalized scales of Gaussian, acquiring a right part error function, indicating a right minimum comparative error, selecting a right scale of Gaussian with the right minimum comparative error, obtaining a right duration of the wave, and obtaining an extracted wave. | 02-12-2015 |
| 20150105681 | ACTIVE MEDICAL DEVICE, INCLUDING AN IMPLANTABLE DEFIBRILLATOR, FOR DETECTION OF QRS COMPLEXES IN A VERY NOISY SIGNAL - An active implantable medical device (e.g., implantable pacemaker or defibrillator), for detection of QRS complexes in noisy signals. Functional units ( | 04-16-2015 |
| 20150133808 | NONINVASIVE ATRIAL ACTIVITY ESTIMATION SYSTEM AND METHOD - Provided is a non-invasive system for estimating an atrial signal, including a plurality of sensors to sense a surface electrocardiogram signal, a reference atrial signal generation unit to generate an estimated ventricular signal with respect to a R wave in an electrocardiogram signal from one sensor among the plurality of sensors, and to generate a reference atrial signal by subtracting the estimated ventricular signal from the electrocardiogram signal from the one sensor, and an atrial signal estimation unit to generate an estimated atrial signal by applying a constrained independent component analysis algorithm based on the reference atrial signal to the received surface electrocardiogram signal, and to estimate one of the estimated atrial signals as an actual atrial signal, and a method using the same. | 05-14-2015 |
| 20150289781 | Apparatus and method for intravascular catheter navigation using the electrical conduction system of the heart and control electrodes - A new apparatus, algorithm, and method (all called Invention) are introduced herein to support navigation and placement of an intravascular catheter using the electrical conduction system of the heart (ECSH) and control electrodes placed on the patient's skin. According to the present Invention, an intravascular catheter can be guided both in the arterial and venous systems and positioned at different desired locations in the vasculature in a number of different clinical situations. The catheter is connected to the apparatus using, for example, sterile extension cables, such that the apparatus can measure the electrical activity at the tip of the catheter. Another electrode of the apparatus is placed for reference on the patient's skin. In one embodiment of the present Invention, a control electrode is placed on the patient's chest over the manubrium of the sternum below the presternal notch. In this case, if a catheter is inserted in the venous system, for example in the basilic vein, the Invention will indicate if the tip of the catheter navigates from the insertion point in the basilic vein into the subclavian vein on the same side, into the subclavian vein counter laterally, into the jugular vein, into the superior vena cava, into the cavoatrial junction (CAJ), into the right atrium (RA), into the right ventricle (RV), or into the inferior vena cava (IVC). For the same location of a control electrode, if a catheter is inserted in the arterial system, the Invention will indicate when the tip of the catheter is navigating into the arch of the aorta, into the right coronary artery, into the left circumflex artery, or into the left ventricle (LV). In another embodiment of the present Invention, a control electrode can be placed on the sternum over the xiphoid process. In one embodiment of the present invention, a catheter can be inserted in the arterial systems by arterial radial, brachial or axillary access. In another embodiment of the present Invention, a catheter may be inserted into either the arterial or the venous systems by femoral or saphenous access. In one aspect of the present Invention, navigation maps are introduced for different locations in the vasculature which allow for easy identification of the location of the catheter tip. In another aspect of the present Invention, a novel algorithm is introduced to compute a navigation signal in real time using electrical signals from the tip of the catheter and from control electrodes. In another aspect of the present Invention, a novel algorithm is introduced to compute in real time navigation parameters from the navigation signal computes according to the present Invention. In another aspect of the present Invention, a method is introduced which makes use of the navigation signal to allow for placing an intravascular catheter at a desired location in the vasculature relative to the ECSH and to the control electrodes placed on the skin. In another aspect of the present Invention, the electrical signals obtained from control electrodes and from the tip of the catheter may be generated by the natural ECSH, e.g., the sino-atrial node (SAN), by artificial (implanted) pacemakers or by electrical generators external to the body. In yet another aspect of the Invention, an apparatus is introduced which supports data acquisition required by the computation of a navigation signal according to the present Invention. | 10-15-2015 |
| 20150342489 | QRS COMPLEX IDENTIFICATION IN ELECTROCARDIOGRAM SIGNALS - The present subject matter relates to processing of Electrocardiogram (ECG) signals, and in particular, relates to identifying a QRS complex in an ECG signal. The method includes receiving, and filtering the ECG signal by passing through at least one of a first low-pass filter and a high-pass filter to obtain a filtered ECG signal. The filtered ECG signal is processed based on a moving average technique. Further, a search region is identified in the processed ECG signal, and a maximum amplitude peak is identified in a time interval of the filtered ECG signal that corresponds to a time span of the search region of the processed ECG signal. The maximum amplitude peak is an R peak of the QRS complex. Subsequently, a Q peak and an S peak of the QRS complex is identified based on the R peak. | 12-03-2015 |
| 20150342490 | BIOLOGICAL SIGNAL DETECTING APPARATUS AND IMPLANTABLE MEDICAL DEVICE - A biological signal detecting apparatus includes a BPF to which a biological signal is input via a lead directly connected to a subcutaneous tissue that emits the biological signal including a predetermined signal of a first frequency and which outputs a filtered biological signal by filtering a biological event signal of a predetermined frequency including the first frequency; and a peak detecting means to which at least the filtered biological signal is input and which detects a peak location of the biological event signal. The BPF includes a first order HPF which filters a frequency higher than a second frequency and a first order LPF which filters a frequency lower than a third frequency. The HPF and the LPF are connected in series between the lead and the peak detecting means. A difference between the second frequency and the third frequency is less than or equal to 10 Hz. | 12-03-2015 |
| 20160045132 | PEAK SELECTION FOR SELF CORRELATION ANALYSIS OF CARDIAC RATE IN AN IMPLANTABLE MEDICAL DEVICES - Self-correlation enhancements and implementations are described. In particular, certain examples demonstrate the use of a peak selector to identify peaks of a self-correlation function which serve as candidate cardiac rates for an implantable medical device. The approach may enable an alternative calculation of cardiac rate in an implantable medical device as a stand-alone rate detector or as a double-check of other rate calculations. | 02-18-2016 |
| 20160106332 | ECG WAVEFORM DETECTING APPARATUS AND IMAGING APPARATUS - According to one embodiment, an ECG waveform detecting apparatus includes an input circuit and processing circuitry. The input circuit receives an ECG signal. The processing circuitry performs first detection of a specific waveform included in the ECG signal, performs update processing of a detection parameter for detecting the specific waveform based on a part of the specific waveform or result of the first detection, performs second detection of the specific waveform from the ECG signal by using the detection parameter after the update processing, and generates a synchronization signal based on information on the second detection. | 04-21-2016 |
| 20160113538 | RELAXATION STATE EVALUATION SYSTEM AND METHOD AND COMPUTER PROGRAM PRODUCT THEREOF - The present invention proposes a relaxation state evaluation system and method and a computer program product thereof. The method comprises steps: measuring ECG data of a user; analyzing the ECG data to generate a first, second, third and fourth parameters, wherein the first parameter is the short-scale entropy slope of the user before cardiovascular disease treatment (CVDT); the second parameter is the difference of the post-CVDT and pre-CVDT mean RR intervals; the third parameter is the logarithm of the variance of the pre-CVDT high frequency NN intervals; the fourth parameter is the logarithm of the ratio of the variances of the pre-CVDT low frequency and high frequency NN intervals; working out an evaluation index, which is a function of the abovementioned parameters; and evaluating the relaxation state of the user, wherein the user is determined to be in a relaxation state if the evaluation index is over a threshold. | 04-28-2016 |
| 20160143552 | ELECTROCARDIOGRAPHY SIGNAL EXTRACTION METHOD - An electrocardiography signal extraction method includes receiving an electrocardiography signal, detecting a peak of a waveform of the electrocardiography signal, separating the waveform into left and right waves, normalizing the left wave and a plurality of scales of Gaussian function, comparing the normalized left wave with a left part of the normalized scales of Gaussian function, acquiring a left part error function, indicating a left minimum comparative error, selecting a left scale of Gaussian function with the left minimum comparative error, obtaining a left duration of the waveform, normalizing the right wave, comparing the normalized right wave with a right part of the normalized scales of Gaussian function, acquiring a right part error function, indicating a right minimum comparative error, selecting a right scale of Gaussian function with the right minimum comparative error, obtaining a right duration of the waveform, and obtaining an extracted wave. | 05-26-2016 |
| 20160175023 | VENTRICULAR FAR FIELD REDUCTION | 06-23-2016 |
| 20160183834 | SEMI-CONTACT-TYPE ECG MEASUREMENT SYSTEM AND MEASUREMENT METHOD THEREOF - The present disclosure provides a semi-contact type ECG measurement system, comprising a contact-type sensor configured to directly contact a skin of a passenger in a vehicle and detect a first ECG signal; a non-contact type sensor configured to be in proximity to the passenger to detect a second ECG signal without directly contacting the skin of the passenger; and an ECG sensor module configured to process the first and second ECG signals and configured to determine a biological status of the passenger from the first and second ECG signals microcontroller. | 06-30-2016 |
| 20160249843 | ALERTNESS DEVICE, SEAT, AND METHOD FOR DETERMINING ALERTNESS | 09-01-2016 |
| 20160375245 | VALIDITY TEST ADAPTIVE CONSTRAINT MODIFICATION FOR CARDIAC DATA USED FOR DETECTION OF STATE CHANGES - Methods, systems, and apparatus for quantifying the quality of a fiducial time marker for a candidate heart beat, quantifying the quality of a candidate heart beat, or determining a time of beat sequence of the patient's heart. A fiducial time marker is obtained for a candidate heart beat. A quality index of said candidate heart beat is set to a first value. The candidate heart beat is tested with at least one beat validity test. At least a second value is added to said quality index of said candidate heart beat if said candidate heart beat passes said at least one beat validity test. The candidate heart beat is tested with at least a second heart beat validity test. At least a third value is added to said quality index of said candidate heart beat if said candidate heart beat passes said at least second heart beat validity test. In one class of beat validity test, a constraint defining a pass is modified at one or more times after the most recent prior valid heart beat that is greater than a constraint modification time threshold | 12-29-2016 |
