| 摘要 |
<p>An atrial defibrillator including a cardioverter for applying cardioverting electrical energy to atria of a heart when the atria is in need of cardio-version, and includes a continuous monitoring system for causing the atrial arrhythmia detector to initial a detection. The monitoring system includes a sense amplifier (51) for sensing atrial activity of the heart, and an A wave detector (53) for detecting A waves of the heart. The A wave detector has a first threshold, and a selecting second threshold higher than the first threshold. A threshold selector is responsive to each detected A wave for activating the second threshold for a finite time period commencing a delay time period after each detected A wave. The A wave detector provides an indication of each detected A wave, and an atrial arrhythmia detector (70) is initiated when the A wave detection rate exceeds a predetermined limit.</p> |
