Electrocardiogram and Vectorcardiogram on Paroxysmal Hypertension of Cystic Pheochromocytoma

Report of a Case

Abstract

A case of cystic pheochromocytoma with paroxysmal hypertension was described in details. We observed that T waves in the lead II, III and aVF were significantly elevated, and the enlarged T loops on vectorcardiogram were more displaced to the left and downward than that before the attack and the QRS-T angle was markedly widened during the attacks. The mechanism for these changes was discussed.