Lead system for use with an atrial defibrillator and method

Details Lead system for use with an atrial defibrillator and method Lead system for use with an atrial defibrillator and method

1993-10-01

1994-09-27

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 4, 607122, A61N 139

Patent

active

053504046

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. A plurality of lead systems are also described for use with the atrial defibrillator which reduce the quantity of electrical energy required to defibrillate the heart and ensure that the delivered atrial defibrillating electrical energy is substantially confined to the atria of the heart.

REFERENCES:
patent: 4401126 (1983-08-01), Reenstierna
patent: 4643201 (1987-02-01), Stokes
patent: 5014696 (1991-05-01), Mehra
patent: 5111811 (1992-05-01), Smits
patent: 5165403 (1992-11-01), Mehra

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