Echocardiographic changes in pheochromocytoma.

M-mode echocardiography proved to be a useful method in the diagnosis of cardiac changes produced by pheochromocytoma. Findings recorded during a hypertensive crisis included systolic anterior movement of the anterior mitral leaflet, paradoxical septal motion, and prominent excursion of the posterior wall. After surgery, early regression of the chronic effects of hypertension was observed.