Patent ID: 7515956
Filing Date: 2009-04-07
Classification: A61B,A61N

Abstract:
1. A system for discriminating ventricular tachycardia (VT) from supraventricular tachycardia (SVT), the system comprising: a sensing circuit that senses an atrial electrogram indicative of atrial depolarizations and a ventricular electrogram indicative of ventricular depolarizations; a rate detector circuit, coupled to the sensing circuit, that detects an atrial rate based on the atrial electrogram and a ventricular rate based on the ventricular electrogram; a tachycardia detector circuit, coupled to the rate detector circuit, that detects a tachycardia based on at least one of the atrial rate and the ventricular rate; a rhythm classifier circuit, coupled to the rate detector circuit and the tachycardia detector circuit, that classifies the detected tachycardia as a 1:1 tachycardia in response to the atrial rate and the ventricular rate being substantially equal; and a tachycardia discriminator circuit coupled to the rhythm classifier circuit, the tachycardia discriminator circuit including: