Α 33–year-old woman was admitted to our clinic with electrocardiographic (ECG) manifestations of anterior ST-elevation myocardial infarction, dizziness, weakness, and feeling of oncoming collapse. She underwent coronary angiography that showed normal coronary arteries and an echocardiography study that showed reduced left ventricular contractility with diffuse hypokinesis and an estimated ejection fraction of (EF) 35–40 %. The biochemical testing showed enzymatic activity typical of myocardial necrosis. The patient had hypertensive peaks on a 24-h recording of blood pressure, while immunological and virological test results were negative. Magnetic resonance imaging showed partial epicardial enhancement. A tumor in the right adrenal medulla was detected with computed tomography, and biochemical testing showed increased levels of urinary vanillylmandelic acid as well as serum metanephrines. The diagnosis of pheochromocytoma was made and confirmed by histological findings after surgical resection of the tumor. The left ventricular systolic dysfunction gradually reversed, the EF returned to normal, and the ECG findings were normalized, indicating cardiomyopathy due to pheochromocytoma.