A reversible form of apical left ventricular hypertrophy associated with pheochromocytoma.

A patient with pheochromocytoma was found to have typical features of apical left ventricular hypertrophy similar to apical hypertrophic cardiomyopathy of the Japanese type. The electrocardiogram showed giant negative T waves (1.0 mV), and echocardiography as well as angiographic examination revealed left ventricular hypertrophy confined to the apex. Surgical removal of the tumor resulted in striking regression of apical hypertrophy and essential normalization of the electrocardiogram within 1 year of operation. These findings emphasize the possible role of catecholamines in the cause of apical hypertrophic cardiomyopathy and illustrate the potential reversibility of this condition in association with pheochromocytoma. It is suggested that patients with signs of apical left ventricular hypertrophy should undergo thorough screening for a pheochromocytoma.