Hypertension and post-traumatic renal arteriovenous fistula: demonstration of unilaterally elevated renin secretion.

Ipsilateral elevation and contralateral suppression of renin secretion have been established in a patient with a post-traumatic renal arteriovenous fistula associated with diastolic hypertension. This finding is rare because of the dilutional effect of arterial blood shunted in the renal vein. Increased renin secretion in this instance supports the proposed mechanism of diastolic hypertension with renal arteriovenous fistula.