Document Detail


Assessment of left ventricular structure and function in rats subjected to pressure-overload hypertrophy in time.
MedLine Citation:
PMID:  19253187     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Left ventricular hypertrophy (LVH) is an adaptive response to increased haemodynamic load and an independent risk factor for the development of heart failure. Although the pathophysiological features during the development of cardiac hypertrophy have been extensively studied, the time course of LVH is less clearly defined. AIM: To define the time-dependency of the LVH process in vivo and compare the data by necropsy. METHODS: Using abdominal aortic banding (AAB) in male Wistar strain albino rats we assessed the changes of LV structure and function in short intervals of 5 days for a period of 45 days. We determined the changes by serial echocardiography and confirmed the results in a second echocardiographic experiment and by necropsy. RESULTS: In our model the magnitude of the pressure overload was sufficient to produce significant LVH within a 10-day time frame and further progression on the 15th day after AAB. Interestingly, on the 20th day after banding a short-lasting regression of LVH (and heart weight and LV wall thickness) was found. It was followed by an increase in the next 15 days (till the 35th day), after which LVH was roughly complete (as measured at the 45th day). CONCLUSIONS: Following the development of LVH over a relatively long period of time and providing the changes in short intervals, a short lasting regression during ongoing pressure overload was noted. Understanding and targeting the associated signalling underlying this regression may have considerable clinical consequences.
Authors:
Vili Stoyanova; Nikolai Zhelev; Evghenil Ghenev; Miroslava Bosheva
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Kardiologia polska     Volume:  67     ISSN:  0022-9032     ISO Abbreviation:  Kardiol Pol     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-03-02     Completed Date:  2009-04-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376352     Medline TA:  Kardiol Pol     Country:  Poland    
Other Details:
Languages:  eng     Pagination:  27-34; discussion 35     Citation Subset:  IM    
Affiliation:
Department of Pediatrics and Medical Genetics, Medical University, Vasil Aprilov Blv 15A, Plovdiv, Bulgaria. vi1sto@abv.bg
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MeSH Terms
Descriptor/Qualifier:
Animals
Constriction
Disease Models, Animal
Echocardiography
Hypertension / complications*
Hypertrophy, Left Ventricular / etiology*,  pathology*,  ultrasonography
Organ Size
Pressure
Rats
Rats, Wistar
Ventricular Dysfunction, Left / etiology*,  pathology*,  ultrasonography

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


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