Ventricular conduction delay trending system and method
AssigneeCardiac Pacemakers, Inc.
InventorJiang Ding
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Abstract
A method and system for ascertaining the condition of the heart's conduction system in a patient treated for congestive heart failure with pacing therapy. In accordance with the invention, changes in ventricular activation patterns are monitored over time in order to detect changes in the heart's conduction system that may occur due to physiological regeneration of conduction pathways. The activation patterns are reflected by electrogram signals detected from different ventricular locations. By measuring the difference in conduction times of an excitation impulse traveling from the AV node to the different ventricular locations, a parameter representative of the heart's conduction system is obtained that may be used to adjust the pacing therapy in accordance therewith.
Claims21
1-42. (Canceled)
A method for operating a cardiac device, comprising:
- detecting first and second R-waves at first and second ventricular locations during an intrinsic ventricular beat;
- and,
- calculating a ventricular conduction delay as the time interval between the occurrences of the first and second R-waves.
A cardiac device, comprising;
- first and second ventricular sensing channels for detecting first and second R-waves resulting from depolarizations occurring at first and second ventricular locations;
- and,
- circuitry for calculating a ventricular conduction delay as the time interval between the occurrences of the first and second R-waves.
Dependencies are inferred from the claim text.