Arq. Bras. Cardiol. 2017; 108(6): 572-575
Myocardial Bridge and Angiotomography of the Coronary Arteries: Perfusion under Pharmacological Stress
DOI: 10.5935/abc.20170021
Introduction
The myocardial bridge is one of the most prevalent congenital anomalies that involve the coronary circulation, and its incidence in the general population is high, affecting from 23 to 55% in necropsy studies.The impairment of the anterior descending artery is more frequent, on its proximal 2/3.In most patients, the myocardial bridges do not cause symptoms, because in order to have ischemia, there must be an imbalance between supply and consumption of oxygen. The superficial bridges, with small or slender muscle band, are the most common ones, and they may account for 75% of the cases, with average length of 1.5 cm and usually without causing symptoms. In approximately 24% of the cases, we observed deep myocardial bridges, with thicker muscle band.,
Atherosclerosis is the most common cause of ischemic heart disease. However, other causes for ischemia are frequent, and among them, we highlight the myocardial bridge, which may provoke typical or atypicalchest angina,acute myocardial infarction and sudden death.–
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