Method and apparatus for stimulating a heart

Details Method and apparatus for stimulating a heart Method and apparatus for stimulating a heart

1993-09-09

1995-03-07

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 14, A61N 1368

Patent

active

053953975

ABSTRACT:
A heart stimulator is disclosed which is capable of sensing and stimulating both the atrium and ventricle in a heart such a way that a ventricular stimulation pulse is emitted either after a stimulated or spontaneous atrial event following the atrioventricular interval, or after the expiration of a minimum synchronous interval following a stimulated or spontaneous ventricular event, depending on which interval elapses last. The functioning of the heart stimulator, when the atrium's spontaneous rate is faster than a stimulation rate corresponding to the minimum synchronous interval, is improved by delivering an extra atrial stimulation pulse at a second predetermined atrioventricular interval before the next ventricular stimulation pulse, if the interval between the most recently detected atrial event and the next ventricular stimulation pulse exceeds a predetermined threshold value.

REFERENCES:
patent: 4539991 (1985-09-01), Boute et al.
patent: 4890617 (1990-01-01), Markowitz et al.
patent: 4974589 (1990-12-01), Sholder
patent: 5103820 (1992-04-01), Markowitz
patent: 5123412 (1992-06-01), Betzold
patent: 5129393 (1992-07-01), Brumwell

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