Patent ID: 7480529

Claim:
A system for classifying cardiac arrhythmias, the system comprising: a signal input to receive a cardiac signal indicative of a detected arrhythmia episode; an irregularity analyzer coupled to the signal input, the irregularity analyzer adapted to produce an irregularity parameter being an irregularity sample entropy (SampEn I ) indicative of a degree of cycle length irregularity of the cardiac signal or a parameter having a predetermined mathematical relationship with SampEn I ; a complexity analyzer coupled to the signal input, the complexity analyzer adapted to produce a complexity parameter being a complexity sample entropy (SampEn C ) indicative of a degree of morphological complexity of the cardiac signal or a parameter having a predetermined mathematical relationship with SampEn C ; and an arrhythmia classifier coupled to the irregularity analyzer and the complexity analyzer, the arrhythmia classifier adapted to classify the detected arrhythmia episode based on the irregularity parameter and the complexity parameter.