Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2005-10-25
2005-10-25
Jastrzab, Jeffrey R (Department: 3762)
Surgery
Diagnostic testing
Cardiovascular
Reexamination Certificate
active
06959212
ABSTRACT:
The present invention provides a system and a method for discriminating supraventricular tachyarrhythmias from ventricular arrhythmias during a tachycardia episode. First cardiac signals and second cardiac signals are sampled for cardiac complexes. A first feature on the first cardiac signal and a second feature on the second cardiac signal are utilized to determine an average time difference for a plurality of normal sinus rhythm complexes. A time difference between the first feature and the second feature is then determined for each cardiac complex of a tachycardiac rhythm. The cardiac complex is characterized as a ventricular tachycardia complex if the time difference exceeds the average time difference by a predetermined amount. Otherwise, it is classified as VT if its morphology after alignment is different from that during normal sinus rhythm.
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Hsu William
Smith Joseph Martin
Cardiac Pacemakers Inc.
Jastrzab Jeffrey R
Schwegman Lundberg Woessner & Kluth P.A.
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