System and method for detecting physiologic states based on intracardiac electrogram signals while distinguishing cardiac rhythm types
US8262578B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2006 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Jul 13, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/37
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Techniques are provided for tracking patient respiration or other physiologic states based upon intracardiac electrogram (IEGM) signals. In one example, respiration patterns are detected based upon cycle-to-cycle changes in morphological features associated with individual cardiac cycles while taking into account different cardiac rhythm types within the patient, such as predominantly paced or predominantly intrinsic rhythm types. Once respiration patterns have been identified, episodes of abnormal respiration, such as apnea, hyperpnea, nocturnal asthma, or the like, may be detected and therapy automatically delivered. In addition, techniques for detecting abnormal respiration using a pattern classifier are described, wherein the pattern classifier is trained while distinguishing the different cardiac rhythm types of the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.