NDLI: Computational Study of Blood Flow in an Aorto-Coronary Bypass Model using Single versus Sequential Grafting Technique

Content Provider	IEEE Xplore Digital Library
Author	Meena, S. Chen Xiang
Copyright Year	2007
Description	Author affiliation: Inst. for Infocomm Res., Singapore (Meena, S.; Chen Xiang)
Abstract	Coronary artery bypass grafting (CABG) is performed to obtain myocardial reperfusion downstream from severe coronary stenoses. When a single artery is blocked the routine CABG is performed while more than one artery are blocked, say the branches of the coronary vessels are stenosed, sequential grafting technique is adopted. However even though the advantage of using sequential bypass grafting over single bypass grafts are not fully known, the hemodynamics of the surgically reconstructed coronary bed is strongly dependent on the bypass configuration. Hence an attempt is made to analyse the blood flow in a three-dimensional aorto-coronary bypass graft model (which has the proximal portion of the branches of the left circumflex artery, namely the obtuse marginals 1 and 2 to be 90% and 80% occluded) using single grafts and sequential bypass graft. The finite volume technique was employed to model the 3-D blood flow pattern to determine the distribution of wall shear stress (WSS) and their spatial gradients (WSSG) in the bypassed regions for two specific instances of the cardiac cycle namely, t=0.15 s the mid-ejection phase and t=0.57 s the mid- diastole phase Results confirm that WSSG distribution is much higher while using single bypass grafts. Hence it is suggested that when two or more branches of the coronary vessels are occluded, sequential bypass grafting technique would be more efficient thereby contributing to the long-term graft patency.
Starting Page	2701
Ending Page	2704
File Size	440315
Page Count	4
File Format	PDF
ISBN	9781424407873
ISSN	1557170X
DOI	10.1109/IEMBS.2007.4352886
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-22
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Blood flow Arteries Hemodynamics Surgery Computational fluid dynamics Veins Geometry Solid modeling Myocardium Diseases
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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