Patent ID: 7653436
Filing Date: 2010-01-26
Classification: A61B,G01S,G07C

Abstract:
1. A method for evaluating global cardiac performance using an implantable medical device, comprising: measuring dynamic intracardiac impedance over a time period; identifying a first systolic event and a second systolic event from the time period; evaluating an integral of the dynamic intracardiac impedance from about the first systolic event to about the second systolic event to determine a systolic performance parameter; identifying a first diastolic event and a second diastolic event from the time period; evaluating an integral of the dynamic intracardiac impedance from about the first diastolic event to about the second diastolic event to determine a diastolic performance parameter; determining global cardiac performance by comparing the systolic performance parameter with the diastolic performance parameter; and modifying therapy delivered by the implantable medical device as a function of the global cardiac performance.