| Visualization of flow structures in Fontan patients using 3-dimensional phase contrast magnetic resonance imaging. | |
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MedLine Citation:
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PMID: 22088274 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: Our objective was to analyze 3-dimensional (3D) blood flow patterns within the total cavopulmonary connection (TCPC) using in vivo phase contrast magnetic resonance imaging (PC MRI). METHODS: Sixteen single-ventricle patients were prospectively recruited at 2 leading pediatric institutions for PC MRI evaluation of their Fontan pathway. Patients were divided into 2 groups. Group 1 comprised 8 patients with an extracardiac (EC) TCPC, and group 2 comprised 8 patients with a lateral tunnel (LT) TCPC. A coronal stack of 5 to 10 contiguous PC MRI slices with 3D velocity encoding (5-9 ms resolution) was acquired and a volumetric flow field was reconstructed. RESULTS: Analysis revealed large vortices in LT TCPCs and helical flow structures in EC TCPCs. On average, there was no difference between LT and EC TCPCs in the proportion of inferior vena cava flow going to the left pulmonary artery (43% ± 7% vs 46% ± 5%; P = .34). However, for EC TCPCs, the presence of a caval offset was a primary determinant of inferior vena caval flow distribution to the pulmonary arteries with a significant bias to the offset side. CONCLUSIONS: 3D flow structures within LT and EC TCPCs were reconstructed and analyzed for the first time using PC MRI. TCPC flow patterns were shown to be different, not only on the basis of LT or EC considerations, but with significant influence from the superior vena cava connection as well. This work adds to the ongoing body of research demonstrating the impact of TCPC geometry on the overall hemodynamic profile. |
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Authors:
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Kartik S Sundareswaran; Christopher M Haggerty; Diane de Zélicourt; Lakshmi P Dasi; Kerem Pekkan; David H Frakes; Andrew J Powell; Kirk R Kanter; Mark A Fogel; Ajit P Yoganathan |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-15 |
Journal Detail:
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Title: The Journal of thoracic and cardiovascular surgery Volume: - ISSN: 1097-685X ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376343 Medline TA: J Thorac Cardiovasc Surg Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 The American Association for Thoracic Surgery. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology & Emory University, Atlanta, Ga. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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