Rate responsive pacing using the ventricular gradient

Details Rate responsive pacing using the ventricular gradient Rate responsive pacing using the ventricular gradient

1986-03-19

1988-07-26

Kamm, William E.

Surgery

Truss

Pad

128704, A61N 136

Patent

active

047593660

ABSTRACT:
A rate responsive cardiac pacing system is provided. In the illustrative embodiment, electrical stimulus pulses are applied to the heart ventricle and the evoked potential of the applied electrical stimulus pulses is detected. The detected potential is integrated over time to obtain a depolarization gradient and a repolarization gradient. A peak to peak time interval is determined from the peak of the depolarization gradient to the peak of the repolarization gradient. The peak to peak time interval is compared to the peak to peak time interval of at least one previous cardiac cycle. The rate of the electrical stimulus pulses is controlled in response to this comparison.

REFERENCES:
patent: 3572321 (1971-03-01), Bloomfield et al.
patent: 4140132 (1979-02-01), Dahl
patent: 4202339 (1980-05-01), Wirtzfeld et al.
patent: 4228803 (1980-10-01), Rickards
patent: 4305396 (1981-12-01), Wittkampf et al.
patent: 4622980 (1986-11-01), Kunig
Fananapazir et al., "Reliability of the Evoked Response . . . ," 8 Pace 701-714, (Sep.-Oct. 1985).

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