Evangelista A, González T, García del Castillo H, Candell J, Soler Soler J
Servicio de Cardiología, Hospital General Vall d'Hebron.
Rev Esp Cardiol. 1990 Oct;43(8):581-3.
A case of spontaneous echocardiographic contrast in the left ventricle of a patient with severe aortic insufficiency is presented. This contrast appeared through the mitral valve which opened mainly during tele-diastole. Pulsed Doppler showed the blood flow responsible was laminar and of normal velocity. The mechanism of spontaneous intraventricular contrast cannot be attributed to poor left ventricle function or to high-velocity turbulent flow. We believe that spontaneous contrast was triggered by the decrease in proto-diastolic mitral flow secondary to aortic insufficiency. Transient stagnation of blood in the left atrium might modify the echogenic characteristics of the blood which persist during the passage of the flow through the left ventricle.
本文报告了一例严重主动脉瓣关闭不全患者左心室内出现自发超声心动图造影的病例。这种造影通过主要在舒张末期开放的二尖瓣出现。脉冲多普勒显示，产生造影的血流呈层流且速度正常。左心室内自发造影的机制不能归因于左心室功能不良或高速湍流。我们认为，自发造影是由主动脉瓣关闭不全继发的舒张早期二尖瓣血流减少所触发的。左心房内血液的短暂停滞可能改变了血液的回声特性，这种特性在血流通过左心室的过程中持续存在。
