Apparatus for detecting and treating tachyarrhythmia for a pacer, cardioverter, defibrillator.

摘要

The cardiac cycle length of the heart in a slow supraventricular rhythm (240) is used to establish and automatically adapt the rate detection threshold (210) for a tachyarrhythmia detector A timing window (W1) is established extending from the end of a blanking interval (200) to the end of a fibrillation detection interval (210) and sensed ventricular events falling within the window are counted. The lower (211) and upper (212) limits of the fibrillation detection interval are physician-programmable.