Measurement of plasma renin concentration and angiotensin II in peripheral and renal venous plasma in the management of renovascular hypertension.

Athough in general, measurement of renal vein renin appears to give a good prediction as to the subsequent response to surgery, its main value lies in its ability to reflect changes in renal plasma flow; true changes in renin secretion rate being much more difficult to detect. Although it is a little early to say how much information can be derived from saralasin infusions, caution must be exercised in necessarily assuming that the test accurately reflects subsequent surgical response.