Warnowicz M A, Santucci B A, Bucheleres H G, Denes P
Circulation. 1981 Aug;64(2):421-6. doi: 10.1161/01.cir.64.2.421.
Paroxysmal supraventricular tachycardia (PSVT) is associated with altered hemodynamics. We describe the echocardiographic features of myocardial dysfunction during a prolonged episode of PSVT in an 11-year-old male. The abnormality of the phases of cardiac activity presented as a markedly prolonged left ventricular systole (320 msec) and isovolumic relaxation phase (220 msec) and a shortened and delayed diastolic filling period (140 msec). These abnormalities reverted to normal immediately after spontaneous conversion to sinus rhythm. Propranolol, which was used to prevent PSVT in this child, may have been involved in the mechanism of the altered mechanical events.
阵发性室上性心动过速（PSVT）与血流动力学改变有关。我们描述了一名11岁男性在PSVT长时间发作期间心肌功能障碍的超声心动图特征。心脏活动各阶段的异常表现为左心室收缩期明显延长（320毫秒）和等容舒张期延长（220毫秒），舒张期充盈期缩短且延迟（140毫秒）。自发转为窦性心律后，这些异常立即恢复正常。用于预防该患儿PSVT的普萘洛尔可能参与了机械事件改变的机制。
