Demand pacer with programmable rate hysteresis
US4169480A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1978 |
| Grant date | Oct 2, 1979 |
| Priority date | — |
| Expiry date | Jun 19, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/37254
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A demand pacer has a local memory element, programmable from a remote source, which detects whether or not the hysteresis rate adjustment is to be employed. When hysteresis is disabled, the pacer operates in the normal demand mode, at a rate optionally selected by the same memory. In the hysteresis mode, a flip-flop controls gating means, ultimately operable at conventional or hysteresis rates, ultimately for controlling the output amplifier. An input amplifier senses natural heart beat signals, and enables a gating means, which has been conditioned for hysteresis mode operation, to reset the flip-flop and in turn the output controlling gates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.