Rate responsive pacemaker and pacing method
US5134997A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Aug 14, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36585
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A rate responsive pacemaker and a pacing method for optimizing the pacing decay curve after a period of increased activity. The pacing method includes the steps of selecting a set of predetermined achievement criteria such as an achievement rate and an achievement time interval. The achievement rate is selected between an upper pacing rate and a first pacing switch rate threshold. The pacing method then determines whether the achievement criterion has been met. If the achievement criterion has been met, then the decay time constant of the decay curve changes from a first value to a second value, as the pacing rate drops below the first pacing switch rate threshold. A second pacing switch rate threshold lower than the first pacing switch rate threshold is then selected, and, if the achievement criteria have been met, then the decay time constant of the decay curve is modified from the second value to a third value, as the pacing rate drops below the second pacing switch rate threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.