Cardiac pacemaker with activity sensor
US5215084A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Mar 15, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36542
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cardiac pacemaker includes an activity sensor for detecting physical activity of a patient and generating a momentary output signal and an activity clock cycle generator having an adjustable clock cycle rate adjustable to the activity of the patient, for generating stimulation impulses for cardiac muscles of the patient at a rate defined by an end of one of a basic rate interval and an escape interval, the basic rate interval being a normal interval between stimulating impulses, and the escape interval being an on-demand interval between stimulating impulses. Varying circuitry for varying the basic rate interval and escape interval of the activity clock cycle generator between upper and lower fixed limits dependent on the activity of the patient detected by the activity sensor is provided, wherein the varying circuitry includes evaluation circuitry for generating a control signal for controlling the activity clock cycle generator as a time measurement for the rate of the stimulation impulses based on a comparison of the momentary output of the activity sensor with a threshold value. The rate of the stimulation impulses is thereby determined by the evaluation circuitry based on a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.