Electrocardiography:
To evaluate the function of heart lesion, we also did the electrocardiography examination (Data not shown). 44 cases were normal, 10 were sinus rhythm and t-wave changed, 4 had high voltage in the left ventricle with sinus rhythm, 2 nodal tachycardia, 2 left anterior fascicular block with sinus rhythm, 2 t-wave changed accompanied with U-wave elevated and sinus rhythm.