Patent ID: 8386039

Claim:
A tachyarrhythmia detection and classification system, comprising: a sensing circuit to sense at least one cardiac signal; and an implant controller, coupled to the sensing circuit, the implant controller including: an arrhythmia discriminator module, the arrhythmia discriminator module to create a first classification of a tachyarrhythmia as either ventricular tachycardia (VT) or supraventricular tachycardia (SVT) and to discriminate between VT and SVT using one or more template patterns of respective sequences of atrial and ventricular contractions to determine how many template patterns occur in a sequence of detected atrial and ventricular depolarizations, wherein to determine how many template patterns occur in the sequence of atrial and ventricular depolarizations, the arrhythmia discriminator module is to: count a number of one or more VT-likely template patterns representing one or more corresponding indications that a ventricular tachyarrhythmia is likely; and characterize the first classification of the tachyarrhythmia as more likely indicative of ventricular tachycardia if the number of one or more VT-likely template patterns representing one or more corresponding indications that a ventricular tachyarrhythmia is likely exceeds a threshold number.