Increased level of serum
catecholamines in the acute phase was reported to be a feature of
takotsubo cardiomyopathy (TC). We report a TC case with
pheochromocytoma, which caused a stir in the diagnosis of TC and suggests the importance of screening for a
catecholamine-producing
tumor. A female patient was referred to our emergency department due to ongoing
chest pain. Coronary angiography showed no abnormality; however, subsequent left ventriculography showed basal
hyperkinesis and apical ballooning, which completely recovered in 2 weeks. She experienced significant emotional stress on the eve of her admission, to which the diagnosis of TC was attributed. Although serum
catecholamine levels on admission in our case were higher than on day 14, the value on day 14 was much higher than the normal range in our patient. The screening abdominal computed tomography scan revealed a left adrenal mass, which was diagnosed as
pheochromocytoma by 24-hour urinary excretion of
catecholamine and (131)I-MIBG scintigraphy. The mass was successfully resected and pathological findings supported the diagnosis. In our case, emotional stress was thought to be the direct trigger to develop TC by exceeding the threshold of
catecholamine-induced
cardiomyopathy. Screening for a
catecholamine-producing
tumor through careful history-taking and measuring
catecholamines at a follow-up stage were important clinical aspects in this case and may well be for others.