Abstract

A year-old female was admitted for evaluation of exercise-induced angina and mild dyspnoea. The patient underwent transthoracic echocardiography, which showed no wall motion abnormality or significant valvular disorder. However, parasternal long-axis view revealed a markedly dilated proximal right coronary artery (RCA) (see, Fig. 1 panel A). A treadmill exercise test was stopped after 4 min because of exercise-limiting angina and 2-mm ST-segment depression. Selective left coronary angiography revealed a short left anterior descending coronary a a a M r c r C fi o t o D

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