Defibrillator and method utilizing three channel sensing

Details Defibrillator and method utilizing three channel sensing Defibrillator and method utilizing three channel sensing

1994-08-29

1995-04-04

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 139

Patent

active

054033543

ABSTRACT:
An implantable atrial defibrillator provides a pulse of defibrillating electrical energy to the atria of the heart in synchronism with sensed R waves in response to non-coincident sensing of an R wave at first and second areas of the heart. The defibrillating pulse is provided after a predetermined number of consecutive R waves are non-coincidently sensed to assure reliable synchronization. The atrial defibrillator is also operational in a marker mode wherein a number of synchronization marker pulses are delivered to the heart for detection on an externally generated electrocardiogram. The atrial fibrillation detector of the defibrillator is normally disabled and is activated when the sensed ventricular activity indicates a probability of atrial fibrillation to conserve a depletable power source. An endocardial lead is also described which ensures that the delivered atrial defibrillating electrical energy is substantially confined to the atria of the heart.

REFERENCES:
patent: 3716059 (1973-02-01), Welborn et al.
patent: 4354497 (1982-10-01), Kahn
patent: 4790317 (1988-12-01), Davies
patent: 5101824 (1992-04-01), Lekholm
patent: 5165403 (1992-11-01), Mehra

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