Hemodynamic responses to acute and gradual renal artery stenosis in pigs

American Journal of Hypertension
Nicolas RognantLaurent Juillard

Abstract

Reduction of renal blood flow (RBF) due to a renal artery stenosis (RAS) can lead to renal ischemia and atrophy. However in pigs, there are no data describing the relationship between the degree of RAS, the reduction of RBF, and the increase of systemic plasma renin activity (PRA). Therefore, we conducted a study in order to measure the effect of acute and gradual RAS on RBF, mean arterial pressure (MAP), and systemic PRA in pigs. RAS was induced experimentally in six pigs using an occluder placed around the renal artery downstream of an ultrasound flow probe. The vascular occluder was inflated gradually to reduce RBF. At each inflation step, percentage of RAS was measured by digital subtraction angiography (DSA) with simultaneous measurements of RBF, MAP, and PRA. Data were normalized to baseline values obtained before RAS induction. Piecewise regression analysis was performed between percentage of RAS and relative RBF, MAP, and PRA, respectively. In all pigs, the relationship between the degree of RAS and RBF was similar. RBF decreased over a threshold of 42% of RAS, with a rapid drop in RBF when RAS reached 70%. PRA increased dramatically over a threshold of 58% of RAS (+1,300% before occlusion). MAP increased slightly (+15%...Continue Reading

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Citations

Jan 29, 2011·European Heart Journal·Iris Baumgartner, Lilach O Lerman
Mar 4, 2011·American Journal of Physiology. Renal Physiology·Alfonso EirinLilach O Lerman
Feb 6, 2013·American Journal of Hypertension·James D KrierLilach O Lerman
Mar 16, 2017·Medical Engineering & Physics·A R GhigoJ-M Fullana
Jul 2, 2019·Investigative Radiology·Kai JiangLilach O Lerman
Oct 26, 2018·Hypertension·Alfonso EirinLilach O Lerman
Jun 3, 2021·Antioxidants·Áine M de BhailísPhilip A Kalra
Jun 30, 2021·Trends in Molecular Medicine·Lilach O Lerman

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