Document Detail


Renal-portal shunt ameliorates renovascular hypertension in pigs.
MedLine Citation:
PMID:  15787629     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Renovascular hypertension is the most common curable form of secondary hypertension. Renin angiotensin system activation depends on the balance between renin production by the kidney and renin degradation by the liver. Thus, we aimed to examine whether deviation of renin-rich blood from the affected kidney into the portal circulation (portalization) can ameliorate renovascular hypertension. METHODS: We selected a porcine model of unilateral renal artery stenosis because the pig's anatomy and physiology are comparable to those of humans and because pigs have already been found capable of developing chronic renovascular hypertension. Angiography and ultrasonography were deliberately used to evaluate renal artery stenosis and the renal-portal shunt. Histology was used to examine the effects of portalization on the kidney and liver after a period of two months. RESULTS: As expected, following the creation of a left renal artery stenosis both renin activity and mean blood pressure measurements increased from 1.23 +/- 0.06 ng/mL/h and 85.6 +/- 0.5 mm Hg at baseline to 4.59 +/- 0.02 ng/mL/h and 126 +/- 1.76 mm Hg, respectively. After portalization renin activity returned to the normal range (1.59 +/- 0.07 ng/mL/h) followed by a concomitant reduction of mean blood pressure to 91 +/- 2 mm Hg. Moreover, a significant correlation was observed between changes in renin activity and blood pressure measurements during the two stages of the experiment. Both the kidney and liver remained macroscopically and microscopically intact at the end of the experiment. CONCLUSION: Portalization of the affected kidney can ameliorate renovascular hypertension and therefore, it might be of benefit in those individuals with fibromascular or atheromatous lesions in the renal artery or its branches not amenable to balloon angioplasty or surgical revascularization.
Authors:
Konstantinos Katsenis; Demetrios V Vlahakos; Pavlos Antoniadis; Georgia Kostopanagiotou; Aris Antoniou; Achilles Chatziioannou; Vassilis Arapoglou; Basil Agroyannis; Panagiotis Dimakakos
Related Documents :
12801039 - Portal hypertension and portal hypertensive gastropathy in patients with liver cirrhosi...
3953799 - Interaction of flow and resistance in maintenance of portal hypertension in a rat model.
7801949 - Effects of intravenous nitroglycerin and nitroglycerin and metoclopramide on intravaric...
606739 - Accumulation of technetium-99m stannous pyrophosphate in contused myocardium.
8496039 - Animal model of portal hypertension with observations regarding the relationship betwee...
10209079 - Splanchnic and systemic haemodynamic response to volume changes in patients with cirrho...
9728829 - Propofol and hyperventilation for the treatment of increased intracranial pressure in r...
12801039 - Portal hypertension and portal hypertensive gastropathy in patients with liver cirrhosi...
10869679 - Separation of ketoconazole enantiomers by chiral subcritical-fluid chromatography.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Artificial organs     Volume:  29     ISSN:  0160-564X     ISO Abbreviation:  Artif Organs     Publication Date:  2005 Apr 
Date Detail:
Created Date:  2005-03-24     Completed Date:  2005-08-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7802778     Medline TA:  Artif Organs     Country:  United States    
Other Details:
Languages:  eng     Pagination:  333-7     Citation Subset:  IM    
Affiliation:
Aretaieio University Hospital, Athens, Greece.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Disease Models, Animal
Hypertension, Renovascular / enzymology,  pathology,  surgery*
Kidney / pathology
Liver / pathology
Renal Veins / surgery
Renin / blood
Splenic Vein / surgery
Splenorenal Shunt, Surgical*
Swine
Treatment Outcome
Chemical
Reg. No./Substance:
EC 3.4.23.15/Renin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Thyroid disorders in hemodialysis patients in an iodine-deficient community.
Next Document:  Influence of growth hormone on maintenance of capillary-like structures in an in vitro model of stro...