Multiple coronary thrombosis in a patient with thrombocytosis.

A 59-year-old woman was admitted with acute inferior myocardial infarction. Cardiac catheterization revealed total occlusion in the right coronary artery and thrombus-like filling defect in the left anterior descending coronary artery. With simultaneous intracoronary urokinase infusion to the right and left coronary arteries, the right coronary artery became patent and the thrombus in the left anterior descending coronary artery was released to the distal coronary artery. Thrombocytosis was disclosed by laboratory examination. The relationship between myocardial infarction and thrombocytosis is discussed.