| US 7,548,783 B1 | ||
| Implantable cardiac stimulation device having a system for providing atrial therapy based on circadian variations and method | ||
| Laurence S. Sloman, West Hollywood, Calif. (US) | ||
| Assigned to Pacesetter, Inc., Sylmar, Calif. (US) | ||
| Filed on Jan. 11, 2006, as Appl. No. 11/330,208. | ||
| Int. Cl. A61N 1/362 (2006.01) | ||
| U.S. Cl. 607—14 [600/515] | 21 Claims |
| 1. An implantable cardiac stimulation device comprising:
an arrhythmia detector configured to detect an accelerated arrhythmia of a heart;
a data circuit configured to, during a predetermined sampling period, measure a plurality of cardiac cycle lengths during
detected accelerated arrhythmias, determine a time of day corresponding to each of the measured cardiac cycle lengths and
generate a record comprising a count of the number of times a given measured cardiac cycle length occurs within a time-of-day
period; and
a therapy circuit configured to, subsequent to the predetermined sampling period and, upon detection of an accelerated arrhythmia,
provide a selected therapy to the heart based upon the time of day of accelerated arrhythmia detection and the predetermined
count corresponding to the time of day of accelerated arrhythmia detection.
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