Atrial flutter cardioverter

摘要

An implantable atrial defibrillator includes a lead system (33) having a plurality of electrodes (40, 42; 48, 50; 44, 46) to deliver a cardioverting pulse to atria of a heart, for sensing A waves of the heart, and for sensing R waves of the heart. A first detector (54) detects the A waves sensed by the lead system and a second detector (58) detects the R waves sensed by the lead system. An inhibit stage (69) includes a timer (61) to time an inhibit time period responsive to each detected R wave and an output (90) provides the cardioverting pulse to the lead system responsive to an A wave being detected. The inhibit stage precludes provision of the cardioverting pulse during each inhibit time period. <IMAGE>