Shock timing technology
AssigneeImperception, Inc.
InventorCharles Swerdlow
Life of this patent
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Abstract
A method for accurately determining timing points for T-wave shocks is particularly useful in a system for determining a cardiac shock strength in an implantable cardioverter defibrillator (ICD. The method involves acquiring at least one first signal, acquiring at least a second signal, comparing the signals, and selecting a timing point with the T-wave of the signal. The first and second signals may be two different aspects of a single electrogram, first and second electrograms, or a combination thereof. Comparison preferably involves signal alignment and qualitative analysis.
Claims43
A method for accurately timing T-wave shocks, comprising the steps of:
- (a) deriving a first signal from a cardiac electrical signal from a system for determining implantable cardioverter defibrillator cardiac shock strength, wherein the first derived signal relates to a change with respect to time of the T wave of the cardiac electrical signal (b) deriving at least a second signal from a cardiac electrical signal from the system, wherein the at least second derived signal relates to a change with respect to time of the T wave of its respective cardiac electrical signal, (c) comparing the first derived signal and the at least one second derived signal, and (d) based on the comparison, selecting one or more timing points within the T wave of at least one of the derived signals for delivering shocks.
Dependencies are inferred from the claim text.