患者女性,15岁。临床诊断,风心病二尖瓣关闭不全,心衰Ⅱ度。图示心室波群以两个一组的形式出现,其前有增宽的双峰形窦性P波,频率为125次/min。P—R间期由0.20s延长至0.28s,其后继以长心室间歇,为Ⅱ°Ⅰ型房室传导阻滞,文氏周期3:2。但是,在长心室间歇中,没有漏搏的窦性P波出现,而在具有长P—R间期的QRS Patient female, 15 years old. Clinical diagnosis, rheumatic mitral regurgitation, heart failure Ⅱ degree. The graph shows a group of two ventricular waves in front of a widening bimodal sinus P wave frequency of 125 beats / min. P-R interval extended from 0.20s to 0.28s, followed by the long chamber intermittent, Ⅱ ° Ⅰ type atrioventricular block, Wen cycle 3: 2. However, in the long chamber ventricular septal sinus waveform without leakage of leakage, and in the long P-R interval QRS