Standby heart pacer
US4030510A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Nov 5, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/365
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pace pulse generator connects to the heart for stimulating it as required. Heart action due to both natural and artificially stimulated beats is detected. Detected signals are variously processed and stored in a hysteresis circuit which serves as a memory as to the last naturally stimulated heart beat. With the hysteresis circuit set to operate in the negative mode, the hysteresis circuit will wait to determine if a natural beat occurs in a predetermined period of time. If no natural beat occurs, the hysteresis circuit turns on the pulse generator to furnish one or more artificial stimulating pulses until the circuit is reset by occurrence of a naturally stimulated heart beat. With the hysteresis circuit set to operate in the positive mode, the hysteresis circuit similarly waits to determine if a natural beat occurs in a predetermined period of time, but this predetermined period of time is less than the period between the constant rate pulses which are produced by the pulse generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.