ACTIVE IMPLANTABLE MEDICAL DEVICE, IN PARTICULAR CARDIAC STIMULATOR, DEFIBRILLATOR AND / OR CARDIOVERVER AND / OR MULTI-SITE DEVICE COMPRISING MEANS OF MEASUREMENT OF TRANSIENT BIOIMPEDANCE

摘要

P Electrodes are placed at a plurality of separate respective sites having at least one left ventricular site and one right atrial site. These electrodes are connected to a cardiac signal collection circuit, to detect a depolarization potential, as well as to a stimulation circuit, to apply stimulation pulses to at least some of the sites. The device further comprises means for evaluating cardiac output by measuring intracardiac bioimpedance, which are means for measuring transseptal impedance between left ventricle and right atrium, these means operating by injecting a current (16) between a atrial site (AD-) and a ventricular site (VG-) and collection of a differential potential (20) between an atrial site (AD +) and a ventricular site (VG-). /P