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US 7,257,443 B2Granted
Method and apparatus for detecting oscillations in cardiac rhythm with electrogram signals
AssigneeCardiac Pacemakers, Inc.
InventorsJoseph M. Pastore, Steven D. Girouard, Bruce H. KenKnight, Qingsheng Zhu, Jiang Ding
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Abstract
A cardiac rhythm management device is configured to detect oscillations in cardiac rhythm by comparing electrogram signals during successive heart beats. Upon detection of electrical alternans, the device may adjust its operating behavior to compensate for the deleterious effects of the condition.
Claims20
A cardiac rhythm management device, comprising:
- a sensing channel for generating an electrogram waveform;
- a controller programmed to extract a feature from the electrogram waveform during successive cardiac cycles and to detect electrical alternans by determining if a beat-to-beat oscillation above a specified threshold exists with respect to the extracted feature;
- pacing channels configurable for delivering cardiac resynchronization therapy;
- wherein the controller is programmed to either initiate or modify the delivery of cardiac resynchronization therapy if electrical alternans is detected.
1 more element
A method, comprising:
- generating an electrogram waveform;
- extracting a feature from the electrogram waveform during successive cardiac cycles and detecting electrical alternans by determining if a beat-to-beat oscillation above a specified threshold exists with respect to the extracted feature;
- initiating or modifying delivery of cardiac resynchronization therapy if electrical alternans is detected.
Dependencies are inferred from the claim text.