Stefan Hjelm;Karin Järverud;Tomas Svensson;Anders Björling;Malin Hollmark;Kjell Norén
发明人:
Anders Björling,Malin Hollmark,Tomas Svensson,Stefan Hjelm,Kjell Norén,Karin Järverud
申请号：
US13696261
公开号：
US08738120B2
申请日:
2010.05.12
申请国别(地区):
US
年份:
2014
代理人:
摘要：
An implantable medical device (100) is configured for generating a cardiogenic impedance signal representative of the cardiogenic impedance of at least a portion of a heart (10) of a subject (20) during at least a portion of cardiac cycle. A moment processor (132) calculates a moment parameter value based on the cardiogenic impedance signal. The moment parameter is representative of a weighted sum of impedance amplitudes within a time window centered at defined time instance within the cardiac cycle. The weights of the impedance amplitudes are further dependent on the length in time between the defined time instance and the point of time of the associated impedance amplitude. The moment parameter is of high diagnostic value and is employed by an arrhythmia classifier (132) in order to classify a detected arrhythmia of the heart (10), such as discriminate between hemodynamically stable or unstable arrhythmias and/or supraventricular or ventricular tachycardia.
