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Three-dimensional CFD/MRI modeling reveals that ventricular surgical restoration improves ventricular function by modifying intraventricular blood flow.
MedLine Citation:
PMID:  24753501     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Surgical ventricular restoration (SVR) is designed to normalize distorted ventricular shape and size in patients with left ventricular (LV) dysfunction and akinetic and dyskinetic segments. This study is aimed to quantify the characteristics of LV as a pump for a case before and after SVR, which is followed by coronary artery bypass grafting (CABG). We hypothesize that SVR+CABG improves heart flow. A patient with heart failure had magnetic resonance (MR) scans before and 4 months after SVR. LV endocardial geometries were semi-automated segmented and reconstructed using our customized algorithm. The arbitrary Lagrangian-Eulerian formulation of Navier-Stokes equations was solved to derive the flow patterns and calculate pressure differences in LV. After SVR, LV ejection fraction increased from 34% to 48% in patient but was still lower than normal (70%). Second, LV vortices were stronger than pre-surgery but still weaker than normal. The maximum pressure differences between ventricular base and apex increased from 180 to 400 Pa during diastole, from 252 to 560 Pa during systole, respectively. As anticipated, SVR reduced LV volumes and augmented LV ejection fraction. Three-dimensional CFD/MRI modeling suggests that improved diastolic and systolic ventricular function after SVR is associated with changes in intraventricular blood flow. Copyright © 2014 John Wiley & Sons, Ltd.
Authors:
S S Khalafvand; L Zhong; E Y K Ng
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-4-21
Journal Detail:
Title:  International journal for numerical methods in biomedical engineering     Volume:  -     ISSN:  2040-7947     ISO Abbreviation:  Int j numer method biomed eng     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-4-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101530293     Medline TA:  Int j numer method biomed eng     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 John Wiley & Sons, Ltd.
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