A-V responsive rate adaptive pacemaker

Details A-V responsive rate adaptive pacemaker A-V responsive rate adaptive pacemaker

1988-08-29

1989-08-15

Jaworski, Francis

Surgery

Truss

Pad

A61N 136

Patent

active

048565245

ABSTRACT:
A microprocessor controlled A-V responsive rate adaptive DDD cardiac pacemaker is disclosed. The pacemaker includes atrial and ventricular sense amplifiers for detecting P-waves and Q-waves respectively, atrial and ventricular stimulus pulse generators, and A-V interval timer times the interval between a P-wave and subsequent Q-wave. The timed interval is used by a pacing interval calculation algorithm to calculate an A-A pacing interval based on one of two linear functions depending upon whether atrial activity is spontaneous or induced. The pacing interval timer times the pacing interval. If no atrial activity is detected, the atrial stimulus pulse generator paces the atrium. The A-V interval timer also times a maximum A-V interval. If no ventricular activity is sensed in the interval, the ventricular stimulus pulse generator paces the ventricle.

REFERENCES:
patent: 4228803 (1980-10-01), Rickards
patent: 4298007 (1987-11-01), Wright et al.
patent: 4312355 (1982-01-01), Funke
patent: 4313442 (1982-02-01), Knudson et al.
patent: 4397316 (1983-08-01), Barthel
patent: 4421116 (1983-12-01), Markowitz

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