Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2007-04-10
2007-04-10
Pezzuto, Robert E. (Department: 3766)
Surgery
Diagnostic testing
Cardiovascular
Reexamination Certificate
active
09417558
ABSTRACT:
An implantable cardioverter/defibrillator includes a tachycardia detection system that detects one-to-one (1:1) tachycardia, which is a tachycardia with a one-to-one relationship between atrial and ventricular contractions. When the 1:1 tachycardia is detected, the system discriminates ventricular tachycardia (VT) from supraventricular tachycardia (SVT) based on analysis of a cardiac time interval. Examples of the cardiac time interval include an atrioventricular interval (AVI) and a ventriculoatrial interval (VAI). A template time interval is created during a known normal sinus rhythm. The system measures a tachycardia time interval after detecting the 1:1 tachycardia, and indicates a VT detection if the tachycardia time interval differs from the template time interval by at least a predetermined percentage of the template time interval.
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Hsu William
Lovett Eric G.
Sweeney Robert J.
Cardiac Pacemakers Inc.
Oropeza Frances P.
Pezzuto Robert E.
Schwegman - Lundberg Woessner - Kluth
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