Patent ID: 8825146

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 and a complexity analyzer, coupled to the signal input, the irregularity analyzer including an irregularity entropy computer adapted to compute an irregularity parameter Γ I indicative of a degree of cycle length irregularity of the cardiac signal, Γ I related to an irregularity sample entropy (SampEn I ) indicative of the degree of cycle length irregularity of the cardiac signal, wherein SampEn I =−InΓ I , the complexity analyzer including a complexity entropy computer adapted to compute a complexity parameter Γ C indicative of a degree of morphological complexity of the cardiac signal, Γ C related to a complexity sample entropy (SampEn C ) indicative of the degree of morphological complexity of the cardiac signal, wherein SampEn C =−InΓ C ; and an arrhythmia classifier coupled to the irregularity analyzer and the complexity analyzer, the arrhythmia classifier adapted to classify the detected arrhythmia episode using the irregularity parameter and the complexity parameter.