Predictors of Myocardial Infarction after Distal Embolization of Coronary Vessels with Percutaneous Transluminal Coronary Angioplasty

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Abstract
Of 1,855 patients with angina pectoris who underwent percutaneous transluminal coronary angioplasty (PTCA) in our hospital, 21 experienced distal embolization. Five of the patients had slow washout of contrast medium distal to the dilated stenosis accompanied by S-T segment elevation (slow-flow pattern). In the other 16 cases, a dislodged embolus was found distal to the dilated stenosis (occlusive pattern) following balloon inflation. Of the 21 patients, 8 (38%) developed acute myocardial infarction (MI). All patients with acute MI were thought to have intraluminal thrombus on angiography performed before PTCA. Interestingly, patients with recent MI or worsening angina had a significantly higher rate of acute MI (p < 0.05).

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