Protection circuit for implantable cardioverter
US4595009A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1985 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Sep 30, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3931
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implantable medical device to deliver cardioverting energy to cardiac tissue in synchrony with detected ventricular depolarizations having a low power sensing and control circuitry and high power cardioversion circuitry, sharing a common lead and interface circuitry. The lead possesses a superior vena cava electrode and ring and tip electrodes intended to be placed in the ventricle. A sense amplifier is connected across the ring and tip electrode, and the cardioversion energy is delivered across the superior vena cava electrode and the ventricular electrodes. A circuit for protecting the low voltage sense amplifier circuits from high voltage cardioversion output pulses includes a triac which is electrically shorted across the ring and tip electrodes and the input terminals of the sense amplifier during the delivery of the stimulating pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.