Document Detail


Echocardiography Alone Allows the Determination of Heart Failure Stages in Rats with Pressure Overload.
MedLine Citation:
PMID:  23344767     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Background There is currently no standard for the assessment of contractile function in animals. We aimed to determine whether transthoracic echocardiography in rats with chronic pressure overload allows determining the stage of hypertrophy and heart failure (HF).Methods Pressure overload was created by placement of a metal clip around the thoracic aorta at a weight of 40 to 50 g. After 1, 2, 6, 10, and 20 weeks, we performed echocardiography according to the American Heart Association guidelines (n = 26, four to six rats for each time point). We also obtained heart, lung, and body weights and regularly evaluated clinical signs of HF.Results Pressure overload caused significant hypertrophy within 1 week. Contractile function was normal until 6 weeks when diastolic dysfunction appeared. After 10 weeks of pressure overload, systolic function decreased. At 20 weeks, hearts were dilated and cardiac index was decreased. These findings correlated with increased lung-to-body weight ratio after 6 weeks and clinical signs of HF after 20 weeks.Conclusion Echocardiography alone allows the reproducible determination of HF stages after aortic constriction in rats.
Authors:
Yasushige Shingu; Paulo A Amorim; T Dung Nguyen; Moritz Osterholt; Michael Schwarzer; Torsten Doenst
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-23
Journal Detail:
Title:  The Thoracic and cardiovascular surgeon     Volume:  -     ISSN:  1439-1902     ISO Abbreviation:  Thorac Cardiovasc Surg     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7903387     Medline TA:  Thorac Cardiovasc Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Georg Thieme Verlag KG Stuttgart · New York.
Affiliation:
Department of Cardiovascular and Thoracic Surgery, Hokkaido University School of Medicine, Sapporo, Japan.
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