Document Detail


Pericardium-lined skeletal muscle ventricles in circulation up to 589 days.
MedLine Citation:
PMID:  7944819     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Skeletal muscle ventricles (SMVs) were constructed from the latissimus dorsi muscle in 15 beagles. The animals were divided into two groups based on modifications in the SMV construction: group I consisted of 5 animals and group II of 10 animals. After a 3-week vascular delay and 6 to 8 weeks of 2-Hz electrical conditioning, the SMVs were connected to the thoracic aorta. In group I, counterpulsation at 33 Hz resulted in an initial 24.4% augmentation of the mean diastolic pressure, a 27.1% decrease in the presystolic pressure, and a 15.9% increase in the endocardial viability ratio. In group II, the mean diastolic pressure rose by 24.7%, the presystolic pressure decreased by 14.3%, and the endocardial viability ratio increased by 24.5%. During propranolol-induced heart failure, the percentage increase in the mean diastolic pressure was improved (12.9% before propranolol infusion versus 27.6% during propranolol infusion), as was the percentage increase in the endocardial viability ratio (11.2% versus 28.7%). Under low cardiac output conditions, SMV contraction resulted in small but statistically significant increases in the total cardiac output (4.3% at 33 Hz, 7.6% at 85 Hz). One animal in group I survived for 589 days with a functioning SMV before progressive dilation of the SMV (impending rupture) developed. Delayed rupture of the SMV sewing ring anastomosis occurred in 2 dogs. Five animals in group II are all alive, with functioning SMVs in the circulation for 377 to 464 days. No animals in group II had rupture of their SMV or showed evidence of thrombus formation.
Authors:
G A Thomas; H Lu; S Isoda; R L Hammond; H Nakajima; H O Nakajima; M Colson; L W Stephenson
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Annals of thoracic surgery     Volume:  58     ISSN:  0003-4975     ISO Abbreviation:  Ann. Thorac. Surg.     Publication Date:  1994 Oct 
Date Detail:
Created Date:  1994-11-10     Completed Date:  1994-11-10     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  15030100R     Medline TA:  Ann Thorac Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  978-87; discussion 987-8     Citation Subset:  AIM; IM    
Affiliation:
Department of Surgery, Wayne State University, Detroit, Michigan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Bioprosthesis*
Cardiac Output
Counterpulsation / methods*
Dogs
Electric Stimulation
Heart Ventricles*
Hemodynamics
Muscle, Skeletal / physiology,  transplantation*
Myocardium / metabolism
Oxygen Consumption
Time Factors
Ventricular Function
Ventricular Function, Left
Grant Support
ID/Acronym/Agency:
HL08384/HL/NHLBI NIH HHS; HL34778/HL/NHLBI NIH HHS

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


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