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We encountered 4 patients aged over 80 with acute coronary syndrome involving the left main coronary trunk (LMT) who obtained a successful outcome by non-surgical management. CASE 1: An 80-year-old women suffered acute myocardial infarction. A coronary stent was placed at the orifice of the LMT for dilatation of severe 90% stenosis. Cardiac function was markedly improved after treatment during the chronic period. CASE 2: An 81-year-old man who developed non-sustained ventricular tachycardia. Coronary angiography demonstrated severe stenosis with haziness of the LMT. Intra-aortic balloon pumping was performed for one whole day after the attack and the follow-up study performed one month later revealed that the stenosis was markedly diminished to an insignificant grade without residual ischemia. CASE 3: An 81-year-old man developed acute inferior wall infarction with a background of severe triple vessel disease accompanied by an LMT lesion. Coronary stents were placed at three sites, i.e., the right coronary, LMT, and left anterior descending branch. Though initial treatment was successful, this patient died due to severe arrhythmia. Patients in who CABG is strongly indicated due to LMT lesion complicated with multiple organ disorders will increase as the population of the aged continues to increase in Japan. We obtained satisfactory results by intensive intense non-surgical management including PTCA. From our experience, adequate selection of therapeutic regimens for individual patients is important to improve the long-term prognosis as well as the immediate outcome in the acute stage.

Successful Non-Surgical Treatment of Acute Coronary Syndrome Involving the Left Main Coronary Trunk in Four Elderly Patients.