A 16 years old Korean boy was admitted with chief complaints of exertional dyspnea, precordial pain, and headache. His brachial and femoral arterial pressure were 180/100 mmHg and 120/95 mmHg respectively. Aortogram by Seldinger technique revealed postductal adult type coarctation and marked dilation of the poststenotic aortic portion. With arfonad 40mg infusion during clamping, resection of the coarctation segment, and end-to-end anastomosis of the aorta maximal brachial arterial pressure was maintained below 180 mmHg. Postopertive course was uneventful and the patient was discharged two weeks after operation. Precordial pain and headache diasappeared. Brachial and fernoral arterial pressure were 140/80 mmHg and 110/90 mmHg at the time of discharge.[KTCS 1973:1:47-50]