#$%^&*AU2017208227A120180301. Pdf#####ABSTRACT methods, including receiving the people from neighbouring bipolar signal a pair of electrodes cardiac muscle, and a reception electrode pair of first unipolar signal from selection. This method further includes describing single bipolar signal of interested window (WOI), the unipolar signal of the minimum derivative of local monopole is calculated in WOI, with the minimum derivative of the local monopole of time of origin, and WOI calculate bipolarity derivative bipolar signal occur herein. This method further includes the minimum derivative assessed than bipolar derivative and local monopole, and when the ratio is greater than the ratio of preset threshold, the number for distributing appearance is used as time activation cardiac muscle, counts Activation is many and classification unipolar signal is according to number. 5/22 CN) H-aLLJLHJ S>C) L
