System and method for reliably detecting atrial events of a hear

Details System and method for reliably detecting atrial events of a hear System and method for reliably detecting atrial events of a hear

1998-07-01

2000-04-18

Jastrzab, Jeffrey R.

Surgery

Diagnostic testing

Cardiovascular

607 5, A61N 139, A61B 5046

Patent

active

060526173

ABSTRACT:
An atrial defibrillator including a cardioverter for applying cardioverting electrical energy to atria of a heart when the atria are in need of cardioversion and an atrial arrhythmia detector for detecting if the atria are in need of cardioversion includes a continuous monitoring system for causing the atrial arrhythmia detector to initiate a detection. The monitoring system includes a sense amplifier for sensing atrial activity of the heart and an A wave detector for detecting A waves from the sensed atrial activity. The A wave detector has a first threshold and a selectable 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 detection is initiated when the A wave detection rate exceed a predetermined limit.

REFERENCES:
patent: 5267559 (1993-12-01), Jin et al.
patent: 5685315 (1997-11-01), McClure et al.

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