METHOD AND APPARATUS FOR DETECTING MYOCARDIAL ELECTRICAL RECOVERY AND CONTROLLING EXTRA-SYSTOLIC STIMULATION

摘要

An implantable system and method are provided for detecting myocardial electrical recovery time and for controlling the delivery of cardiac stimulation pulses relative to the detected recovery time. One or more fiducial points on a T-wave signal sensed from one or more intracardiac EGM or subcutaneous ECG signals are detected for estimating myocardial recovery time. Extra systolic stimulation pulses are delivered at an extra systolic interval based on a detected recovery time to effectively produce post-extra systolic potentiation while preventing delivery of extra systolic stimuli during the vulnerable period.