| US 7,493,163 B2 | ||
| Rate-adaptive therapy with sensor cross-checking | ||
| Weimin Sun, Plymouth, Minn. (US); Bruce R. Jones, Hopkins, Minn. (US); and Douglas J. Lang, Arden Hills, Minn. (US) | ||
| Assigned to Cardiac Pacemakers, Inc., St. Paul, Minn. (US) | ||
| Filed on Aug. 01, 2006, as Appl. No. 11/461,632. | ||
| Application 11/461632 is a continuation of application No. 10/364129, filed on Feb. 10, 2003, granted, now 7,092,758. | ||
| Application 10/364129 is a continuation of application No. 09/638975, filed on Aug. 15, 2000, granted, now 6,519,495. | ||
| Prior Publication US 2006/0265019 A1, Nov. 23, 2006 | ||
| Int. Cl. A61N 1/365 (2006.01) | ||
| U.S. Cl. 607—19 [607/18] | 10 Claims |
| 1. An implantable device, comprising:
an exertion level sensor for measuring exertion levels;
an activity level sensor for measuring activity levels; and,
a processor for controlling the delivery of pacing pulses, wherein the processor is programmed to:
determine a periodic maximum exertion level over a specified period of time;
associate the periodic maximum exertion level with a simultaneously taken activity level measurement;
associate the simultaneously taken activity level measurement with a particular percentage of the patient's reserve exercise
capacity;
estimate a maximum exercise capacity from the periodic maximum exertion level and a percentage of reserve exercise capacity
represented by the simultaneously taken activity level measurement; and,
compute the patient's maximum exercise capacity as an average of a plurality of estimated maximum exercise capacities.
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