Corya B C
Cardiovasc Clin. 1975;7(2):113-27.
Echocardiography has many attributes that are desirable for diagnostic and research studies in acute myocardial infarction patients. It does not alter the physiologic state being evaluated, is relatively inexpensive, and does not interfere with other hospital procedures. For these reasons, the test may be repeated frequently and used to monitor the changes after acute infarction. Useful information about left ventricular volume, diastolic pressure, and segmental wall motion may be obtained. Because echocarciographic estimates of stroke volume, ejection fraction, and velocity of circumferential fiber shortening are based on motion seen in only one "ice-pick" view of the heart, it is likely that they will be less reliable in patients with asynergy of contraction. Although a definite diagnosis of acute myocardial infarction cannot be made by echocardiography, abnormalities of wall motion may occur very early and support a clinical impression of infarction. An echocardiogram may also reveal changes suggesting ischemia or infarction (abnormal motion) in patients who have atypical chest pain and no other objective evidence of coronary artery disease.
超声心动图具有许多特性，对于急性心肌梗死患者的诊断和研究很有价值。它不会改变所评估的生理状态，相对便宜，并且不会干扰医院的其他检查程序。由于这些原因，该检查可以频繁重复进行，并用于监测急性梗死后的变化。可以获得有关左心室容积、舒张压和节段性室壁运动的有用信息。由于超声心动图对每搏输出量、射血分数和圆周纤维缩短速度的估计仅基于心脏一个“冰锥”视图中看到的运动，因此在收缩不协调的患者中这些估计可能不太可靠。虽然超声心动图不能确诊急性心肌梗死，但室壁运动异常可能很早就出现，并支持梗死的临床印象。超声心动图还可能显示非典型胸痛且无其他冠状动脉疾病客观证据的患者存在提示缺血或梗死（运动异常）的变化。
