PG A1, B1, E2, F1,2alpha and PRA have been measured in 8 hypertensive patients with unilateral renal arterial stenosis, 7 hypertensive patients with unilateral renal atrophy and 20 control normotensive subjects. PRA and PGA1 were significantly increased in patients with renovascular hypertension but not in patients with atrophy. PGE2 and PGF1,2alpha were increased in both groups of patients, especially on the stenotic or atrophic side. The increase of PGA1 and PGE2, represents a secondary antihypertensive, diuretic and natriuretic mechanism, the increase of PGF1,2alpha a direct hypertensive mechanism.
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