Programmable multi-mode cardiac pacemaker

Details Programmable multi-mode cardiac pacemaker Programmable multi-mode cardiac pacemaker

1982-08-05

1986-01-07

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

045628416

ABSTRACT:
A programmable cardiac pacemaker that is selectively programmable via a radio frequency communications link into one of a plurality of a single and dual chamber pacing modes. Depending upon the mode selected, an associated plurality of pacing parameters may be programmed, each within a predetermined range of possible magnitudes.
The pacemaker includes a rate smoothing function for preventing the rate interval from changing by more than a predetermined percentage on a cycle-to-cycle basis; and a graceful degradation function for causing the ventricular pacing rate to decay when the atrial rate exceeds a programmed upper rate limit for a predetermined length of time. A graceful degration onset time and rate of decay are also programmable. Additionally, the pacemaker contains a set of pre-programmed alternative pacing parameters for at least one mode and which can be independently reverted to.
The pacemaker control circuitry is organized about a central bus into an I/O controller and a pacing controller. Pacing control is continuous and its I/O communications operate on a prioritized basis. I/O control permits the programming of any register and the interrogation of a variety of analog parameters associated therewith.

REFERENCES:
patent: 3662759 (1972-05-01), Dabolt
patent: 3693626 (1972-09-01), Cole
patent: 3718909 (1973-02-01), Greatbatch
patent: 4052991 (1977-10-01), Zacouto
patent: 4290429 (1981-09-01), Blaser
patent: 4305397 (1981-12-01), Weisbrod et al.

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