Output pulse artifact rejection in demand pacemakers
US4333470A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1980 |
| Grant date | Jun 8, 1982 |
| Priority date | — |
| Expiry date | Apr 7, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/368
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An atrial-ventricular demand pacemaker having improved atrial pulse artifact rejection includes a blanking circuit (30, 100) connected in the signal path from the ventricular output terminal (17) to the sensing amplifier (21) to blank the signal during an atrial pulse. A holding circuit including a low-pass filter (46, 137) and a switching element (43, 112) stores a prior signal value at the sensing amplifier input during the blanking interval, and delays return to normal operation until after the blanking circuit has returned to normal. Artifact rejection is also improved by limiting atrial pulse output circuit recharge time and by limiting polarization current driven into the ventricular output circuitry by an atrial output pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.