Renal Artery Constriction

Abstract

In acute experiments, during renal artery constriction of constant magnitude, the intrarenal vascular resistance was altered by injection of angio-tensin into the renal artery distal to the constriction. In the presence of a marked pressure gradient 80-100 mm. Hg), angiotensin injection resulted in the disappearance of the pressure gradient and return to baseline values of the damped poststenotic pulse pressure. The pressure gradient across a stenotic lesion of the renal artery probably cannot by considered as a static value and any change in intrarenal resistance will be reflected by a concomitant change in poststenotic arterial pressure.