195.Heart size with stenotic versus regurgitant valve

主动脉狭窄V.S.主动脉瓣返流心影大小比较

A, Poststenotic dilatation of the ascending aorta (white arrow) is present in this patient with aortic stenosis. Notice that the heart is not enlarged because this lesion produces left ventricular hypertrophy (dotted black double arrow). 

A.主动脉狭窄后扩张。心影没有增大。该病变导致左心室肥大。

B, This patient has aortic regurgitation. Note the extremely large heart due to an enlarged left ventricle (solid black double arrow). Volume overload will cause a greater increase in chamber size than will increased pressure.

B.该患者有主动脉返流，心影明显增大，由于左心室增大。血流过载导致心腔明显增大，压力增高。

Notes

1. regurgitant   /ri'gɝdʒətənt/ adj. 返流的

2. hypertrophy  /haɪ'pɜːtrəfɪ/  n. 肥大

3. chamber  /'tʃeɪmbə/n. 室

来源：每天朗读一段医学影像学英语文章