Apparatus and method for adjusting heart/pacer rate relative to cardiac pO.sub.2 obtain a required cardiac output
US4827933A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1987 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | May 15, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36557
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The apparatus for pacing a heart in accordance with the heart rate needed to produce a required cardiac output while the person is exercising, comprises a pacer adapted to be implanted in a human body and having a pulse generator and control circuitry (e.g. a microprocessor) therein, a pacing lead adapted to be implanted in a heart and having a distal electrode adapted to engage and supply pacing pulses to a right ventricle of a heart, and a pO.sub.2 sensor for sensing pO.sub.2 of the blood in the heart. An algorithm or routine utilizing same are stored in the control circuitry (microprocessor) and are adapted to relate pO.sub.2 and/or .DELTA.pO.sub.2 with the required heart rate or change in heart rate, .DELTA.R, needed to supply a desired cardiac output and to cause the pacer to pace the heart at the required heart rate when the heart is not naturally paced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.