Document Detail


Chronic heart failure model with sequential ligation of the homonymous artery and its diagonal branch in the sheep.
MedLine Citation:
PMID:  11730208     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We report a reliable chronic heart failure model in sheep using sequential ligation of the homonymous artery and its diagonal branch. After a left anterior thoracotomy in Corridale sheep, the homonymous artery was ligated at a point approximately 40% of the distance from the apex to the base of the heart, and after 1 hour, the diagonal vessel was ligated at a point at the same level. Hemodynamic measurements were done preligation, 30 minutes after the homonymous artery ligation, and 1 hour after diagonal branch ligation. The electrocardiograms were obtained as needed, and cardiac function was also evaluated with ultrasonography. After a predetermined interval (2 months for five animals and 3 months for two animals), the animals were reevaluated in the same way as before, and were killed for postmortem examination of their hearts. All seven animals survived the experimental procedures. Statistically significant decreases in systemic arterial blood pressure and cardiac output and increases in pulmonary artery capillary wedge pressure were observed 1 hour after sequential ligation of the homonymous artery and its diagonal branch. Untrasonographic analyses demonstrated variable degrees of anteroseptal dyskinesia and akinesia in all animals. The data from animals at 2 months after coronary artery ligation showed significant increases in central venous pressure, pulmonary artery pressure, and pulmonary artery capillary wedge pressure. Left ventricular enddiastolic dimension and left ventricular end-systolic dimension on ultrasonographic studies were also increased. Electrocardiography showed severe ST elevation immediately after the ligation and pathologic Q waves were found at 2 months after ligation. The thin walled infarcted areas with chamber enlargement were clearly seen in the hearts removed at 2 and 3 months after ligation. In conclusion, we could achieve a reliable ovine model of chronic heart failure using a simple concept of sequential ligation of the homonymous and diagonal arteries. This animal model was comparable to the clinical situation.
Authors:
W G Kim; J J Park; S I Oh
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  ASAIO journal (American Society for Artificial Internal Organs : 1992)     Volume:  47     ISSN:  1058-2916     ISO Abbreviation:  ASAIO J.     Publication Date:    2001 Nov-Dec
Date Detail:
Created Date:  2001-12-03     Completed Date:  2002-05-03     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9204109     Medline TA:  ASAIO J     Country:  United States    
Other Details:
Languages:  eng     Pagination:  667-72     Citation Subset:  IM    
Affiliation:
Department of Thoracic and Cardiovascular Surgery and Heart Research Institute, Seoul National University Hospital, Korea.
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MeSH Terms
Descriptor/Qualifier:
Animals
Chronic Disease
Coronary Vessels*
Disease Models, Animal*
Electrocardiography
Heart Failure / pathology,  physiopathology*,  ultrasonography
Heart Ventricles / pathology
Ligation
Male
Myocardial Infarction / pathology,  physiopathology,  ultrasonography
Sheep*

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


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