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CT检查可以区别极微小的X线衰减差异,灵敏度极高,有可能用以检出心肌缺血或梗塞的区域。本文报道在狗离体心脏,用CT检出实验性心肌梗塞的位置及范围的结果。方法:20条狗,剖胸结扎冠状动脉左前降支或回旋支,造成实验性心肌梗塞,24～72小时后,经静脉注入泛影葡胺(600毫克/公斤),5分钟内处死,再次剖胸结扎大血管,取出心脏标本,放入塑料容器中作CT扫描检查。由于供应的冠状动脉分支已被结扎,实验性心肌梗塞区没有造影剂充盈,所以在这些CT图象中,很容易构划出梗塞的轮廊范围。以连续
CT can distinguish very small differences in attenuation of X-ray, high sensitivity, it may be used to detect myocardial ischemia or infarction area. This article reports the results of detecting the location and extent of experimental myocardial infarction in isolated hearts of dogs using CT. Methods: Twenty dogs, thoracotomy, ligation of the left anterior descending coronary artery or ligation of the coronary artery, causing experimental myocardial infarction, 24 to 72 hours after the intravenous diatrizoate (600 mg / kg), were sacrificed within 5 minutes, again Closure of large blood vessels chest, remove the heart specimens, into plastic containers for CT scanning. Since the supplied coronary artery branches have been ligated and there is no contrast filling in the experimental myocardial infarction area, it is easy to map out the infarcted area of the wheelchair in these CT images. To continuous