Coronary spasm as a cause of takotsubo cardiomyopathy and intraventricular obstruction.

A 79-year-old man presented to the emergency room because of chest pain on 3 successive mornings. An electrocardiogram (ECG) showed ST segment elevation in leads II, III, and aVF. Laboratory findings including cardiac enzymes, were within normal limits, except a positive result for the troponin T test. Two-dimensional echocardiography revealed akinesis of the left ventricular apex and hyperkinesis of the basal wall. Doppler echocardiography revealed a significant subaortic pressure gradient. Emergent coronary angiography showed no significant coronary artery stenosis, but the ergonovine test induced a right coronary artery spasm with exaggeration of the ST segment elevation in II, III, and aVF leads. The computed tomography performed 2 weeks later showed normal left ventricular wall motion with sigmoid septum. The patient was diagnosed with takotsubo cardiomyopathy and intraventricular obstruction due to coronary spasm; he was treated with calcium channel blockers and nitrates. This case suggests the importance of differential diagnosis of the pathogenesis of takotsubo cardiomyopathy.