The reversibility of cardiac neuronal function after removal of a pheochromocytoma: an I-123 MIBG Scintigraphic Study.

Purpose: Twelve patients with proved pheochromocytoma evaluated in our institution between 1991 and 1997 are described.

Methods: The patients' urinary excretion rates and their metabolites (vanylmandelic acid and metanephrines) were significantly greater than normal before surgery. Echocardiography showed normal left ventricular ejection fractions (72% +/- 8%).