Document Detail

Hemodynamic evaluation of porcine bioprostheses in the mitral position by Doppler echocardiography.
MedLine Citation:
PMID:  3825906     Owner:  NLM     Status:  MEDLINE    
Twenty-four patients with porcine bioprostheses in the mitral position were studied by Doppler echocardiography followed by cardiac catheterization within 24 hours. Doppler mean diastolic mitral valve gradient was calculated by a 3-point method and mitral valve area was determined by the pressure half-time method. Data from Doppler echocardiography and cardiac catheterization were compared. There was a strong correlation between Doppler echocardiography and catheterization-determined mean diastolic gradient: r = 0.9, standard error of estimate (SEE) = 1.4 mm/Hg (regression equation y = 0.63x + 1.41), p less than 0.001. There was also a strong correlation between Doppler echocardiography and catheterization-determined mitral valve area: r = 0.86, SEE = 0.18 cm2 (regression equation y = 0.64x + 0.52), p less than 0.001. Fourteen patients whose valvular function was considered normal by clinical evaluation had Doppler-calculated mean diastolic gradients of 4.5 to 9.5 mm Hg (mean 6.5 +/- 1.4); the Doppler-determined valve area was 1.15 to 2.0 cm2 (mean 1.54 +/- 0.3). Ten patients had a malfunctioning bioprosthesis, 7 had severe mitral regurgitation and 3 had stenosis. Valvular malfunction in all 10 patients was detected by Doppler echocardiography and confirmed by catheterization and angiocardiography. Nine patients underwent reoperation. Doppler hemodynamic evaluation of porcine bioprostheses in the mitral position provided noninvasive information comparable to that obtained by cardiac catheterization.
M E Fawzy; M Halim; G Ziady; E Mercer; R Phillips; W Andaya
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  59     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1987 Mar 
Date Detail:
Created Date:  1987-04-14     Completed Date:  1987-04-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  643-6     Citation Subset:  AIM; IM    
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MeSH Terms
Blood Pressure
Heart Catheterization*
Heart Valve Prosthesis*
Middle Aged
Mitral Valve*
Mitral Valve Insufficiency / physiopathology
Mitral Valve Stenosis / physiopathology

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

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