索他洛尔除具有β-受体阻滞作用外还具有类抗心律失常药特性。该药可阻滞房室交界区的折返或使房室结顺行性(慢)通道和逆行性(快)通道的不应期增加,电生理研究提示可用于阵发性室上性心动过速(PSVT)的治疗。但由于PSVT发作间隔极不规律,发作频率因人而异,故评价药效困难。本研 Sotalol has antiarrhythmic properties in addition to beta-blocker effects. The drug can block the turn of the junction of atrioventricular junction or make the atrioventricular (retrograde (slow) atrioventricular and retrograde (fast) channel refractory period increase, electrophysiological studies suggest that paroxysmal supraventricular tachycardia Speed ​​(PSVT) treatment. However, because PSVT seizure interval is very irregular, seizure frequency varies, it is difficult to evaluate efficacy. This research