Pacemaker with safe R-wave synchronization during countershock c

Details Pacemaker with safe R-wave synchronization during countershock c Pacemaker with safe R-wave synchronization during countershock c

1997-07-21

1999-12-07

Jastrzab, Jeffrey R.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 139

Patent

active

059998504

ABSTRACT:
An implantable atrial defibrillator analyzes both the atrium and the ventricle to determine an abnormal atrial condition of the atrium and if the ventricle is unstable. Therapy is applied to correct the abnormal atrial condition, such as atrial fibrillation, only if the ventricle is stable, to insure that the therapy does not provoke a ventricular tachyarrhythmia. If the ventricle is unstable, first a process is performed to stabilize it, for example by using a ventricular pacing protocol. After the ventricle is stabilized, the atrial therapy is applied in synchronism with the ventricular events (i.e., in synchronism with either ventricular intrinsic events or ventricular pacing pulses.)

REFERENCES:
patent: 4766901 (1988-08-01), Callaghan
patent: 5207219 (1993-05-01), Adams et al.
patent: 5411524 (1995-05-01), Rahul
patent: 5441523 (1995-08-01), Nappholz
patent: 5480413 (1996-01-01), Greenhut et al.
patent: 5591215 (1997-01-01), Greenhut et al.

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