Acute coronary syndrome with angiographically normal coronary arteries and apical ballooning of the left ventricle. (a) Twelve-lead ECG demonstrating ST-segment elevation in anterior leads; (b) normal right coronary artery; (c) normal left coronary artery; (d) contrast left ventriculography in the right anterior oblique projection at end-diastole; (e) end-systole showing apical ballooning and basal hyperkinesia.