Frade García J, Maldonado Villalón A, Paras Chavero E
Arch Inst Cardiol Mex. 1983 Sep-Oct;53(5):413-20.
In 936 coronary angiocardiographies we found 46 patients with muscular bands. This report concerns 23 patients in which a muscular band was the only coronary pathological finding. In all cases the muscular band was located at the anterior descending artery. The angiocardiographic features that distinguishes the muscular epicardial bands are pointed out. The muscular bands can produce myocardial ischemic changes. Eighty-two per cent had ischemic changes in the resting EKG. Stress tests were positive only when the systolic obstruction was greater than 70%. The ischemic changes were observed in the myocardial zone irrigated by the narrowed artery and in 60% of the cases were accompanied by malfunction of the ventricular wall. In a follow up period averaging 28 months, the majority improved with beta-blockers. Two remained with angina.
在936例冠状动脉造影检查中，我们发现46例存在肌束。本报告涉及23例，其中肌束是唯一的冠状动脉病理发现。所有病例中，肌束均位于前降支动脉。指出了区分心外膜肌束的血管造影特征。肌束可产生心肌缺血性改变。82%的患者静息心电图有缺血性改变。仅当收缩期梗阻大于70%时，负荷试验才呈阳性。缺血性改变在狭窄动脉供血的心肌区域观察到，60%的病例伴有心室壁功能障碍。在平均28个月的随访期内，大多数患者使用β受体阻滞剂后病情改善。2例仍有胸痛。
