Patent ID: 7881779

Claim:
A VF detector, comprising: a data sampler configured to sample a n number of samples of an ECG signal at a predetermined sampling rate; a filter configured to preprocess the samples so as to obtain data y(n); a standardizer configured to perform amplitude standardization to the data y(n) so as to obtain data y 1 ( n ); a numeric value calculator, configured to calculate parameters including a slope peak value SLMax, a probability density value PD, and a complexity value C(n) of the data y 1 ( n ); and an arbitrator configured to detect a VF in accordance with the calculated slope peak value SLMax, probability density value PD and complexity value C(n), respectively, wherein said numeric value calculator further comprises: a slope calculator, configured to calculate the slope peak value SLMax of said data y 1 ( n ); a probability density calculator, configured to calculate the probability density value PD of data y 1 ( n ); and a complexity calculation device, configured to calculate the complexity value of data y 1 ( n ).