qrs amplitudes ( s1 + r5 ) , minnesota code ecg abnormalities and qtc intervals were analyzed in ecgs from 31 pheochromocytoma patients on admission to hospital , after 17 +/- 7.2 ( sd ) days of preoperative phenoxybenzamine therapy in a dosage of 148 +/- 45.0 ( sd ) mg/day and after a mean postoperative follow-up of 6 years .
C0031511
pheochromocytoma
C0031441
phenoxybenzamine