A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve

AIM: To compare the classical and simplified form of the continuity equation in small Trifecta valves. METHODS: This is a retrospective analysis of post-operative echocardiograms performed for clinical reasons after implantation of Trifecta bioprosthetic valves. RESULTS: There were 60 patients aged...

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Autores principales: Chambers, John B, Parkin, Denise, Roxburgh, James, Bapat, Vinayak, Young, Christopher
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Bioscientifica Ltd 2016
Materias:
Research
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5329893/
https://www.ncbi.nlm.nih.gov/pubmed/27249811
http://dx.doi.org/10.1530/ERP-16-0007
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author Chambers, John B
Parkin, Denise
Roxburgh, James
Bapat, Vinayak
Young, Christopher
author_facet Chambers, John B
Parkin, Denise
Roxburgh, James
Bapat, Vinayak
Young, Christopher
author_sort Chambers, John B
collection PubMed
description AIM: To compare the classical and simplified form of the continuity equation in small Trifecta valves. METHODS: This is a retrospective analysis of post-operative echocardiograms performed for clinical reasons after implantation of Trifecta bioprosthetic valves. RESULTS: There were 60 patients aged 74 (range 38–89) years. For the valves of size 19, 21 and 23mm, the mean gradient was 11.3, 10.7 and 9.7mmHg, respectively. The effective orifice areas by the classical form of the continuity equation were 1.4, 1.7 and 1.9cm(2), respectively. There was a good correlation between the two forms of the continuity equation, but they were significantly different using a t-test (P<0.00001). Results using the classical form were a mean 0.11 (s.d. 0.18)cm(2) larger than those using the simple formula. CONCLUSION: Haemodynamic function of the Trifecta valve in the small aortic root is good. There are significant differences between the classical and simplified forms of the continuity equation.
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spelling pubmed-53298932017-03-06 A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve Chambers, John B Parkin, Denise Roxburgh, James Bapat, Vinayak Young, Christopher Echo Res Pract Research AIM: To compare the classical and simplified form of the continuity equation in small Trifecta valves. METHODS: This is a retrospective analysis of post-operative echocardiograms performed for clinical reasons after implantation of Trifecta bioprosthetic valves. RESULTS: There were 60 patients aged 74 (range 38–89) years. For the valves of size 19, 21 and 23mm, the mean gradient was 11.3, 10.7 and 9.7mmHg, respectively. The effective orifice areas by the classical form of the continuity equation were 1.4, 1.7 and 1.9cm(2), respectively. There was a good correlation between the two forms of the continuity equation, but they were significantly different using a t-test (P<0.00001). Results using the classical form were a mean 0.11 (s.d. 0.18)cm(2) larger than those using the simple formula. CONCLUSION: Haemodynamic function of the Trifecta valve in the small aortic root is good. There are significant differences between the classical and simplified forms of the continuity equation. Bioscientifica Ltd 2016-03 2016-03 /pmc/articles/PMC5329893/ /pubmed/27249811 http://dx.doi.org/10.1530/ERP-16-0007 Text en © 2016 The authors http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/) .
spellingShingle Research
Chambers, John B
Parkin, Denise
Roxburgh, James
Bapat, Vinayak
Young, Christopher
A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve
title A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve
title_full A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve
title_fullStr A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve
title_full_unstemmed A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve
title_short A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve
title_sort comparison of two forms of the continuity equation in the trifecta bovine pericardial aortic valve
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5329893/
https://www.ncbi.nlm.nih.gov/pubmed/27249811
http://dx.doi.org/10.1530/ERP-16-0007
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