Patent ID: 7430446

Claim:
A system for classifying tachyarrhythmias, the system comprising: a correlation input to receive a plurality of feature correlation coefficient (Fcc) values each indicative of whether an arrhythmic heart beat of a 1:1 tachyarrhythmia is morphologically correlated to a template heart beat of a known type cardiac rhythm; a majority voting circuit coupled to the correlation input, the majority voting circuit adapted to classify the 1:1 tachyarrhythmia as a first type tachyarrhythmia if a number of the arrhythmic heart beats that are correlated to the template heart beat equals or exceeds a predetermined threshold number, the majority voting circuit including: a correlation comparator to receive each Fcc value of the plurality of Fcc values and indicate a correlated beat if the each Fcc value is greater than a predetermined detection threshold for the plurality of Fcc values; a correlated beat counter circuit to count a number of the indicated correlated beats (N CORR ); and a first type tachyarrhythmia classification circuit to classify the 1:1 tachyarrhythmia as the first type tachyarrhythmia if the N CORR equals or exceeds the predetermined threshold number; and a morphology stability analysis circuit coupled to the majority voting circuit, the morphology stability analysis circuit adapted to further classify the 1:1 tachyarrhythmia based on a stability associated with the Fcc values if the number of the arrhythmic heart beats that are correlated to the template heart beat is smaller than the predetermined threshold number.