Myocardial Infarction
نویسندگان
چکیده
Coronary arteriography was performed before and after the intracoronary injection of nitroglycerin to determine the presence or absence of spasm in patients within the first 12 hours of acute myocardial infarction. Coronary arterial spasm was demonstrated in six of fifteen (40%) acute myocardial infarctions associated with coronary artery disease. In five of the six instances the interval from the onset of symptoms to arteriography was less than 6 hours. Spasm was superimposed on a high-grade atherosclerotic obstruction and was separated from the catheter tip by a segment of normal vessel in each instance. The coronary artery
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