Dilated cardiomyopathy secondary to pheochromocytoma is rare but has been reported to be partially or completely reversible in some cases. A woman with hypertension and cardiac failure due to pheochromocytoma was found to have a dilated, hypokeinetic left ventricle and a restrictive left ventricular filling pattern on two-Dimensional and Doppler echocardiograms. Left ventricular cavity was normalized after aggressive drug treatment, and after sugery of pheochromocytoma,left ventricular filling pattern and blood pressure as well as left ventricular function in echocardiogram were also completely normalized on follow-up without any drug.