The electrocardiographic features during sinus rhythm in 13 patients included:(1)unique QRS comples(rsR?,RR?and qrS)in V 1 and V 2;

• 13例中8例有特殊ECG伴交替图形改变，窦性心律时ECG特征为：（1）V1、V2导联呈特殊QRS波形（rsR?、RR?、qrS型）；