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本文结合心电图对７２例心肌梗塞Ｘ线胸片进行观察，探讨心肌梗塞心脏Ｘ线表现及其相关因素，结果如下：１、心脏增大率５４．２％，左心室增大为主，７６．９％呈主动脉型增大。左心房增大与左心衰和乳头肌功能异常有关。右心室增大多为继发性。２、心肌缺血是心肌梗塞心脏增大的主要原因，缺血组心脏增大率及左心横径均数都高于无缺血组（Ｐ均＜０．００５）。前壁大面积梗塞也是导致心脏增大的原因之一。高血压并非影响心肌梗塞心脏增大的主要原因。３、２６．４％病例显示肺循环异常，上肺静脉扩张是常见表现。肺循环异常的发生率随心脏增大程度而升高（Ｐ＜０．００５）。
In this paper, 72 patients with myocardial infarction X-ray combined with electrocardiogram to observe the chest X-ray findings and related factors, the results are as follows: 1, cardiac enlargement rate of 54.2%, mainly increased left ventricular, 76. 9% showed aortic type increased. Left atrial enlargement and left heart failure and papillary muscle dysfunction related. Right ventricular enlargement mostly secondary. 2. Myocardial ischemia is the main cause of myocardial infarction heart enlargement. The mean heart rate and the mean left heart diameter of ischemic group are higher than that of no ischemic group (all P <0.005). Large anterior infarction is also one of the causes of heart enlargement. Hypertension is not the major cause of heart enlargement in MI. 3,26.4% of cases showed abnormal pulmonary circulation, pulmonary vein dilation is a common manifestation. The incidence of abnormal pulmonary circulation increased with heart enlargement (P <0.005).