Renovascular hypertension is counted among the surgically curable hypertensions, and occupies from 5 to 20per cent of all hypertensions (UENO et al. 1965). Its mechanism is the same as the Goldblatt hypertension (GOLDBLATT et al. 1934), whose vascular lesion can gradually advance, until it becomes refractory to all surgical procedures, if it is left untreated. These circumstances will be greatl...