Rate responsive cardiac pacemaker

Details Rate responsive cardiac pacemaker Rate responsive cardiac pacemaker

1990-05-01

1991-05-14

Jaworski, Francis

Surgery

Truss

Pad

A61N 100

Patent

active

050147021

ABSTRACT:
An implantable activity-based variable rate pacemaker includes an accelerometer for detecting movements of the patient, and discriminates between those of the detected movements indicative of physical exercise by the patient and those of the detected movements indicative of non-exercise. The pacemaker is responsive to detected movements indicative of physical exercise to select a pacing rate according to the level of the physical exercise. Separately, a parameter of the patient which varies in proportion to physical exercise but differs from direct detection of patient movement is sensed to generate an output representing the present state of physical exercise of the patient. That output either confirms or contradicts the determination of physical exercise from the accelerometer-detected movements of the patient, and the pacing rate is consequently set at the aforesaid selected rate according to the intensity of the exercise, or at a base rate consistent with the patient being in a resting state, respectively.

REFERENCES:
patent: 4771780 (1988-09-01), Sholder
patent: 4802481 (1989-02-01), Schroeppel
patent: 4926863 (1990-05-01), Alt

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