Patent application number | Description | Published |
20090281438 | HEART MONITORING SYSTEM AND METHOD - An implantable heart monitoring system includes a housing configured for implantation in a subject, at least one sensor member implanted relative to the heart of the subject to detect an electrical signal related to cardiac activity of the heart, a control circuit in the housing, and a memory accessible by the control circuit. The control circuit, from said electrical signal, derives a first value related to the volume of a first part of the heart and derives a second value related to the volume of a second part of the heart, and monitors variation of said first value over time in at least a substantial portion of a heart cycle, and monitors variation of said second value over time in said substantial portion of said heart cycle, and stores in the memory information representing the monitoring of said first and second values that represents a relationship between the first and second values in the substantial portion of the heart cycle and variation of the relationship in the substantial portion of the heart cycle. | 11-12-2009 |
20100041970 | IMPLANTABLE MEDICAL DEVICE - An implantable medical device has an oxygen sensor adapted to measure the level of oxygen in oxygenized blood, and to generate an oxygen measurement signal in dependence of the level of oxygen. The oxygen sensor is adapted to perform measurements inside the heart, of blood entering the left atrium of a patient's heart. The obtained oxygen measurement signal is compared to a predetermined threshold level and an indication signal is generated in dependence of the comparison. The, indication signal is indicative of the lung functionality of the patient. | 02-18-2010 |
20100099994 | IMPLANTABLE HEART ANALYZING DEVICE, SYSTEM AND METHOD - An implantable heart analyzing device has a housing and a control circuit located within said housing. The control circuit generates an output signal adapted to actuate an activator, which is able to make a wall of the heart deflect or vibrate. The control circuit also communicates with a sensor, which can be identical with the activator, with which the movement of the heart wall can be sensed. The control circuit executes a procedure that involves the generation of an output signal and sensing a corresponding sensor signal, and to be able to derive information concerning the tension of the heart wall. An implantable heart analyzing includes the aforementioned heart analyzing device, as well as the activator and the sensor. The heart analyzing device and the system implement a method that results in generation of the aforementioned information concerning the tension of the heart wall. | 04-22-2010 |
20100113961 | MEDICAL DEVICE FOR DETERMINING THE POSTURE OF PATIENT - The present invention relates to a method for determining the posture of a patient. The method comprises the steps of: initiating ( | 05-06-2010 |
20100121400 | IMPLANTABLE CARDIAC DEVICE AND METHOD FOR MONITORING THE STATUS OF A CARDIOVASCULAR DISEASE - An implantable cardiac device has a heart stimulator for electrically stimulating the heart of a patient, detector that measures a physiologic parameter that is affected by the status of a cardiovascular disease associated with sympathetic activation, a signal processor that determines at least one of a low frequency, LF, and a very low frequency, VLF, Mayer wave component in the measured parameter, and analyzer that automatically analyzes the determined Mayer wave component in relation to a predetermined reference value to determine the status of the cardiovascular disease. The detector is a cardio-mechanical parameter detector that measures, as said physiologic parameter, a mechanical change in at least one of the four chambers of the heart. In a corresponding method for monitoring the status of a cardiovascular disease associated with sympathetic activation of a patient having an implantable electric heart stimulator a physiologic parameter affected by the cardiac disease is measured. At least one of a low frequency, LF, and a very low frequency, VLF, Mayer wave component in the parameter is determined, and the wave component is analyzed in relation to a predetermined reference value to determine the status of the cardiovascular disease. A mechanical change in at least one of the four chambers of the heart is measured as the physiologic parameter. | 05-13-2010 |
20100179411 | IMPLANTABLE MEDICAL DEVICE AND A METHOD COMPRISING MEANS FOR DETECTING AND CLASSIFYING VENTRICULAR TACHYARRHYTMIAS (As Amended) - In a method and implantable medical device for ventricular tachyarrhythmia detection and classification, upon detection of a ventricular tachyarrhythmia based on an electrocardiogram signal, cardiogenic impedance data representative of ventricular volume dynamics are collected and used for classifying the detected tachyarrhythmia as stable or unstable. In the latter case but typically not in the former case, defibrillation shocks or other forms of therapy are applied to combat the unstable ventricular tachyarrhythmia. | 07-15-2010 |
20100292550 | IMPLANTABLE MEDICAL DEVICE - An analyte measuring system has an implantable medical device having a signal source arranged for generating a current signal and electrodes for applying the current signal to a surrounding tissue in a subject body. The device measures a resulting voltage signal with the electrodes and calculates an impedance signal therefrom. The system comprises a signal processor arranged for generating an estimate of a concentration of an analyte in the tissue based on a spectrum analysis of the determined impedance signal. | 11-18-2010 |
20100298904 | IMPLANTABLE HEART STIMULATOR FOR MEASURING DYSSYNCHRONY USING IMPEDANCE - Implantable heart stimulator connectable to an electrode arrangement has a pulse generator adapted to deliver stimulation pulses to a heart of a subject; an impedance measurement unit adapted monitor at least one heart chamber of the heart of the subject to measure the impedance in the at least one monitored heart chamber for generating an impedance signal corresponding to the measured impedance. The impedance signal is applied to a processor where the signal is processed, according to specified criteria, and a fractionation index value is determined represented by the curve length of the impedance signal during a predetermined measurement period. The fractionation index value is a measure of different degrees of mechanical dyssynchrony of the heart. | 11-25-2010 |
20110144508 | METHOD AND DEVICE FOR MONITORING ACUTE DECOMPENSATED HEART FAILURE - An implantable medical device has an impedance determiner for determining a cardiogenic impedance signal based on electric signals sensed by connected electrodes. A parameter calculator processes the impedance signal to calculate an impedance parameter representative of the cardiogenic impedance in connection with the diastolic phase of a heart cycle. This parameter is then employed by the device for monitoring acute decompensated heart failure status of a subject. | 06-16-2011 |
20110166614 | IMPLANTABLE ANALYTE RF SPECTROSCOPY MEASURING SYSTEM - An analyte measuring system includes implantable medical device having a RF signal source arranged for generating a RF signal and a transmitting antenna for transmitting the RF signal into a surrounding tissue in a subject body. The system has a receiving RF antenna for receiving the RF signal from the tissue and a signal processor arranged for generating an estimate of a concentration of an analyte in the tissue based on a spectral analysis of the received RF signal. | 07-07-2011 |
20110184301 | HEART FAILURE DETECTOR - In an apparatus and method for detecting incipient heart failure of a patient. Impedance signals reflecting volume changes of the right ventricle and/or the right atrium of a heart of the patient are obtained. The impedance signals are processed to determine a first impedance parameter substantially reflecting a volume of the right ventricle, and a heart failure status is determined based on the first impedance parameter, wherein a decreasing first impedance parameter is determined to be an indication of a deterioration of the heart failure status. | 07-28-2011 |
20120004700 | IDENTIFICATION OF PACING SITE - An implantable medical device applies an electric signal over two electrodes and measures the resulting electric signal over a candidate pair of neighboring electrodes on a lead for a first heart ventricle or over a candidate electrode of the lead and a case electrode. An impedance signal is determined for each candidate pair or electrode based on the applied signal and the measured resulting signal. A time difference between start of contraction in a second ventricle and the timing of local myocardial contraction as identified from the impedance signal at the site of the candidate pair or electrode is determined for each candidate pair or electrode. An optimal pacing electrode is selected to correspond to one of the electrodes of the candidate pair having the largest time difference or the candidate electrode having largest time difference. | 01-05-2012 |