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Computational fluid dynamics in Fontan patients to evaluate power loss during simulated exercise

Authors :
Merih Cibis
Jan L. M. Strengers
Adriaan Moelker
Sjoerd S. M. Bossers
Frank J. H. Gijsen
René F. Verhaart
Jolanda J. Wentzel
Michiel Schokking
Willem A. Helbing
Pediatrics
Cardiology
Cardiothoracic Surgery
Radiology & Nuclear Medicine
Source :
Heart, 100, 696-701, Heart, 100, 9, pp. 696-701, Heart, 100(9), 696-701. BMJ Publishing Group
Publication Year :
2014

Abstract

Item does not contain fulltext OBJECTIVE: Exercise intolerance is common in total cavopulmonary connection (TCPC) patients. It has been suggested that power loss (Ploss) inside the TCPC plays a role in reduced exercise performance. Our objective is to establish the role of Ploss inside the TCPC during increased flow, simulating exercise in a patient-specific way. METHODS: Cardiac MRI (CMR) was used to obtain flow rates from the caval veins during rest and increased flow, simulating exercise with dobutamine. A 3D reconstruction of the TCPC was created using CMR data. Computational fluid dynamics (CFD) simulations were performed to calculate Ploss inside the TCPC structure for rest and stress conditions. To reflect the flow distribution during exercise, a condition where inferior caval vein (IVC) flow was increased twofold compared with rest was added. 29 TCPC patients (15 intra-atrial lateral tunnel (ILT) and 14 extracardiac conduit (ECC)) were included. RESULTS: Mean Ploss at rest was 1.36 +/- 0.94 (ILT) and 3.20 +/- 1.26 (ECC) mW/m(2) (p

Details

ISSN :
13556037
Database :
OpenAIRE
Journal :
Heart, 100, 696-701, Heart, 100, 9, pp. 696-701, Heart, 100(9), 696-701. BMJ Publishing Group
Accession number :
edsair.doi.dedup.....f152689f94c09b03b7efbcb2acb50572