明确区分各种类型的PSVT需要进行详细临床电生理检查,特别是程序刺激可诱发和终止各种折返性心动过速,对诊断和鉴别诊断有重要意义。但这并不排除体表心电图的作用。 IART较少见,其心电图表现为:发作时心率一般在100～150次/min,P波形态与正常窦性心律时不同,且每次心搏也可有差别,其后跟随正常的QRS波。P-R间期大于0.12 s,但可因心率快慢不 A clear distinction between various types of PSVT requires a detailed clinical electrophysiological examination, in particular the program can induce and terminate a variety of reentry tachycardia, diagnosis and differential diagnosis of great significance. But this does not rule out the role of surface ECG. IART is rare, the ECG showed: heart attack rate is generally 100 to 150 beats / min, P wave morphology and normal sinus rhythm, and each heartbeat may be different, followed by the normal QRS wave . P-R interval is greater than 0.12 s, but may not because of the heart rate