Programmable multi-mode cardiac pacemaker
US4562841A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1982 |
| Grant date | Jan 7, 1986 |
| Priority date | — |
| Expiry date | Aug 5, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/37223
- WIPO fieldMedical technology
- WIPO sectorInstruments
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 analo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.