Document Detail


Hemodynamic performance of mitroflow aortic pericardial bioprosthesis - optimizing management for the small aortic annulus.
MedLine Citation:
PMID:  20333567     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Documentation of the hemodynamics of the Mitroflow aortic pericardial bioprosthesis has been incomplete. The aim of the study was to provide reference effective orifice areas for the implant calculation of effective orifice area indexes to avoid prosthesis-patient mismatch. METHODS: Echocardiograms were evaluated in 55 patients (39 females, 16 males), mean age 77.0 +/- 6.9 years (range 51-90 years). The mean time of the studies was 11.0 months. The prosthesis sizes and numbers evaluated were 19 mm (n = 13), 21 mm (n = 19), 23 mm (n = 13) and 25 mm (n = 10). RESULTS: Peak aortic velocities averaged from 2.2 to 2.7 m/sec, mean gradients from 10.6 to 15.1 mmHg, peak gradients from 20.7 to 29.7 mmHg, and effective orifice area (EOA) from 1.4 to 1.8 cm (2). When accounting for the subaortic velocity, mean gradients averaged from 7.5 to 10.0 mmHg, and peak gradients averaged 15.1 to 23.5 mmHg. The effective orifice area indexes ranged from 0.8 to 1.0 cm (2)/m (2). The mean postoperative left ventricular mass index was 101.6 gm/m (2). CONCLUSIONS: The IN VIVO effective orifice areas by valve size of the Mitroflow aortic pericardial bioprosthesis provide the opportunity of avoiding obstructive characteristics for all valve sizes, including optimizing the management of the small aortic annulus.
Authors:
W R E Jamieson; W R Forgie; R I Hayden; Y Langlois; H Ling; E A Stanford; K A Roberts; W B Dolman
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Publication Detail:
Type:  Journal Article; Multicenter Study     Date:  2010-03-23
Journal Detail:
Title:  The Thoracic and cardiovascular surgeon     Volume:  58     ISSN:  1439-1902     ISO Abbreviation:  Thorac Cardiovasc Surg     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-24     Completed Date:  2010-06-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7903387     Medline TA:  Thorac Cardiovasc Surg     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  69-75     Citation Subset:  IM    
Affiliation:
Division of Cardiovascular Surgery, University of British Columbia, Vancouver, Canada. eric.jamieson@vch.ca
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MeSH Terms
Descriptor/Qualifier:
Aged
Aged, 80 and over
Animals
Aortic Valve / physiopathology,  surgery*,  ultrasonography
Bioprosthesis*
Canada
Cattle
Female
Heart Valve Diseases / physiopathology,  surgery*,  ultrasonography
Heart Valve Prosthesis*
Heart Valve Prosthesis Implantation / instrumentation*
Hemodynamics*
Humans
Male
Middle Aged
Pericardium / transplantation*
Prosthesis Design
Texas
Time Factors
Treatment Outcome

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


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