“…Since then, various therapeutic approaches to reno vascular hypertension have been tried, the most impor tant being reconstructive or ablative surgery, antihyper tensive drugs including converting enzyme inhibitors and percutaneous transluminal dilatation (PTD). There are numerous studies on the results of these therapeutic procedures reporting an improved and cured incidence of renovascular hypertension in 60-95% of surgically treated patients [2][3][4] and in 35-90% in dilated patients [5][6][7][8]. Medical therapy with conventional antihyperten sive drugs seems to be successful in controlling hyperten sion in about 50% of the cases [9], whereas under the converting enzyme inhibitor, captopril, sufficient blood pressure control was observed in as many as 80% of the cases [10,11], Up to now, direct comparisons between the described therapeutic regimes have been lacking.…”