open access

Vol 67, No 1 (2009)
Other
Published online: 2009-01-26
Submitted: 2012-12-28
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Original article
Assessment of left ventricular structure and function in rats subjected to pressure-overload hypertrophy in time

Vili Stoyanova, Nikolai Zhelev, Evghenii Ghenev, Miroslava Bosheva
Kardiol Pol 2009;67(1):27-34.

open access

Vol 67, No 1 (2009)
Other
Published online: 2009-01-26
Submitted: 2012-12-28

Abstract


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.

Abstract


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.
Get Citation

Keywords

cardiac hypertrophy; left ventricle; pressure overload; time-course; rats

About this article
Title

Original article
Assessment of left ventricular structure and function in rats subjected to pressure-overload hypertrophy in time

Journal

Kardiologia Polska (Polish Heart Journal)

Issue

Vol 67, No 1 (2009)

Pages

27-34

Published online

2009-01-26

Bibliographic record

Kardiol Pol 2009;67(1):27-34.

Keywords

cardiac hypertrophy
left ventricle
pressure overload
time-course
rats

Authors

Vili Stoyanova
Nikolai Zhelev
Evghenii Ghenev
Miroslava Bosheva

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