Computational fluid dynamics analysis and validation of blood flow in Coronary Artery Bypass Graft using specific models

2014 ◽  
Author(s):  
Ravi Laohasurayodhin ◽  
Paweena Diloksumpan ◽  
Pranya Sakiyalak ◽  
Phornphop Naiyanetr
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Blood Flow ◽  
Coronary Artery ◽  
Coronary Artery Bypass Graft ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Dynamics Analysis ◽  
Artery Bypass Graft ◽  
Computational Fluid Dynamics Analysis

scholarly journals Patient-Specific Multiscale Modeling of Blood Flow for Coronary Artery Bypass Graft Surgery

2012 ◽  
Vol 40 (10) ◽  
pp. 2228-2242 ◽  
Author(s):  
Sethuraman Sankaran ◽  
Mahdi Esmaily Moghadam ◽  
Andrew M. Kahn ◽  
Elaine E. Tseng ◽  
Julius M. Guccione ◽  
...  
Keyword(s):  
Blood Flow ◽  
Coronary Artery ◽  
Coronary Artery Bypass Graft ◽  
Coronary Artery Bypass ◽  
Multiscale Modeling ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Patient Specific ◽  
Artery Bypass Graft

The effects of fenoldopam on coronary conduit blood flow after coronary artery bypass graft surgery

2001 ◽  
Vol 15 (1) ◽  
pp. 72-76 ◽  
Author(s):  
Michele Halpenny ◽  
Stinivasan Lakshmi ◽  
Aonghus O'Donnell ◽  
Sheila O'Callaghan-Enright ◽  
Damian O'Connell ◽  
...  
Keyword(s):  
Blood Flow ◽  
Coronary Artery ◽  
Coronary Artery Bypass Graft ◽  
Coronary Artery Bypass ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Artery Bypass Graft

A Numerical Study of Blood Flow in Coronary Artery Bypass Graft Side-to-Side Anastomoses

2002 ◽  
Vol 30 (5) ◽  
pp. 599-611 ◽  
Author(s):  
Michael Bonert ◽  
Jerry G. Myers ◽  
Stephen Fremes ◽  
James Williams ◽  
C. Ross Ethier
Keyword(s):  
Blood Flow ◽  
Coronary Artery ◽  
Coronary Artery Bypass Graft ◽  
Coronary Artery Bypass ◽  
Numerical Study ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Artery Bypass Graft

Sympathetic ganglion transcutaneous electrical nerve stimulation after coronary artery bypass graft surgery improves femoral blood flow and exercise tolerance

2014 ◽  
Vol 117 (6) ◽  
pp. 633-638 ◽  
Author(s):  
Gerson Cipriano ◽  
J. Alberto Neder ◽  
Daniel Umpierre ◽  
Ross Arena ◽  
Paulo J. C. Vieira ◽  
...  
Keyword(s):  
Blood Flow ◽  
Coronary Artery ◽  
Coronary Artery Bypass Graft ◽  
Coronary Artery Bypass ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Stellate Ganglion ◽  
Cold Pressor Test ◽  
Walking Distance ◽  
Artery Bypass Graft

We tested the hypothesis that transcutaneous electrical nerve stimulation (TENS) over the stellate ganglion region would reduce sympathetic overstimulation and improve femoral blood flow (FBF) after coronary artery bypass graft surgery. Thirty-eight patients (20 men, 24 New York Heart Association class III-IV) were randomized to 5-day postoperative TENS ( n = 20; 4 times/day; 30 min/session) or sham TENS ( n = 18) applied to the posterior cervical region (C7-T4). Sympathetic nervous system was stimulated by the cold pressor test, with FBF being measured by ultrasound Doppler. Femoral vascular conductance (FVC) was calculated as FBF/mean arterial pressure (MAP). Six-min walking distance established patients' functional capacity. Before and after the intervention periods, pain scores, opiate requirements, and circulating β-endorphin levels were determined. As expected, preoperative MAP increased and FBF and FVC decreased during the cold pressor test. Sham TENS had no significant effect on these variables ( P > 0.05). In contrast, MAP decreased in the TENS group (125 ± 12 vs. 112 ± 10 mmHg). This finding, in association with a consistent increase in FBF (95 ± 5 vs. 145 ± 14 ml/min), led to significant improvements in FVC ( P < 0.01). Moreover, 6-min walking distance improved only with TENS (postsurgery-presurgery = 35 ± 12 vs. 6 ± 10 m; P < 0.01). TENS was associated with lesser postoperative pain and opiate requirements but greater circulating β-endorphin levels ( P < 0.05). In conclusion, stellate ganglion TENS after coronary artery bypass graft surgery positively impacted on limb blood flow during a sympathetic stimulation maneuver, a beneficial effect associated with improved clinical and functional outcomes.

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