title: [The haemodynamic effects of renal artery stenosis (author's transl)].
abstract: Three reasons are suggested for the difficulty of judging the haemodynamic effects of renal artery stenosis: 1. The flow characteristics in the renal arteries of dogs indicate that, at the critical level of reduction to one third of normal diameter, a further change of only 0.5 mm. will cause a 50% alteration in flow volume. Variations of this order of magnitude cannot be reliably measured on the angiogram. 2. The production of turbulence, which can increase the effect of a stenosis considerably, depends, amongst other things, on the nature of the surface of the stenosis and this cannot be judged. 3. The effect of a stenosis depends on peripheral resistance in the kidney.
mesh_terms: D000818:Animals; D004285:Dogs; D006439:Hemodynamics; D007668:Kidney / Q000098:blood supply; D012039:Regional Blood Flow; D012077:Renal Artery / Q000503:physiopathology; D012078:Renal Artery Obstruction / Q000503:physiopathology*; D014655:Vascular Resistance
vernacular_title: Zur hämodynamischen Wirksamkeit der Nierenarterienstenose.