Righetti A, Crawford M H, O'Rourke R A, Daily P O, Ross J
Chest. 1977 Oct;72(4):455-8. doi: 10.1378/chest.72.4.455.
In 38 patients undergoing elective coronary arterial bypass graft surgery, the radiographic dimension of the left side of the heart was determined and echocardiographic studies were performed before and after surgery. On the plain chest x-ray film one week after surgery, all patients showed an increase in the size of the left side of the heart, which usually was not accompanied by an increase in the echocardiographic left ventricular end-diastolic dimension; however, in 25 patients, pericardial fluid was detected soon after surgery, which would explain the enlarged cardiac silhouettes. Several months after surgery, the radiographic size of the heart returned to the preoperative value in most patients, and pericardial fluid was no longer demonstrated on the echocardiogram. Thus, pericardial fluid frequently is found in the first week following coronary arterial bypass graft surgery and may give the impression of increased cardiac size on plain chest x-ray films; however, echocardiographic studies provide a more accurate estimate of left ventricular size and reveal the presence of pericardial effusion.
在38例行择期冠状动脉旁路移植术的患者中，测定了心脏左侧的影像学尺寸，并在手术前后进行了超声心动图研究。术后一周的胸部平片上，所有患者心脏左侧大小均增大，但其通常并不伴有超声心动图测得的左心室舒张末期内径增加；然而，25例患者在术后不久检测到心包积液，这可以解释心脏轮廓增大的原因。术后数月，大多数患者心脏的影像学大小恢复到术前值，超声心动图也不再显示心包积液。因此，心包积液在冠状动脉旁路移植术后第一周很常见，可能会在胸部平片上给人心脏增大的印象；然而，超声心动图研究能更准确地评估左心室大小，并揭示心包积液的存在。
