Implantable cardiac device providing rapid pacing T wave...

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems

Reexamination Certificate

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C607S009000, C607S014000

Reexamination Certificate

active

10868240

ABSTRACT:
An implantable cardiac device that delivers electrical therapy to a patient's heart determines if a T wave alternan pattern of the patient's heart exists. The device includes a sensing circuit that generates an electrical signal including T waves representing paced electrical activity of the heart and a morphology detector that measures a metric of each T wave in the electrical signal. A T wave alternan pattern detector determines, responsive to the measured T wave metrics, if a paced activity T wave alternan pattern is present. The T wave alternan pattern detector may also detect for intrinsic T wave alternan patterns. A therapy control initiates suitable different responses for a paced T wave alternan pattern detection and an intrinsic T wave alternan pattern detection.

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David J. Christini, et al., “Endocardial Detection of Repolarization Alternans,”IEE Transactions on Biomedical Engineering; vol. 50, No. 7 (2003), pp. 855-862.

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