TY - JOUR
T1 - Development of a computational fluid dynamics model for myocardial bridging
AU - Javadzadegan, Ashkan
AU - Moshfegh, Abouzar
AU - Fulker, David
AU - Barber, Tracie
AU - Qian, Yi
AU - Kritharides, Leonard
AU - Yong, Andy S.C.
N1 - An erratum exists for this article and can be found in the Journal of Biomechanical Engineering (2019) Vol 141(1)
PY - 2018/9/1
Y1 - 2018/9/1
N2 - Computational fluid dynamics (CFD) modeling of myocardial bridging (MB) remains challenging due to its dynamic and phasic nature. This study aims to develop a patient-specific CFD model of MB. There were two parts to this study. The first part consisted of developing an in silico model of the left anterior descending (LAD) coronary artery of a patient with MB. In this regard, a moving-boundary CFD algorithm was developed to simulate the patient-specific muscle compression caused by MB. A second simulation was also performed with the bridge artificially removed to determine the hemodynamics in the same vessel in the absence of MB. The second part of the study consisted of hemodynamic analysis of three patients with mild and moderate and severe MB in their LAD by means of the developed in silico model in the first part. The average shear stress in the proximal and bridge segments for model with MB were significantly different from those for model without MB (proximal segment: 0.32 ± 0.14 Pa (with MB) versus 0.97 ± 0.39 Pa (without MB), P < 0.0001-bridge segment: 2.60 ± 0.94 Pa (with MB) versus 1.50 ± 0.64 Pa (without MB), P < 0.0001). When all three patients were evaluated, increasing the degree of vessel compression shear stress in the proximal segment decreased, whereas the shear stress in the bridge segment increased. The presence of MB resulted in hemodynamic abnormalities in the proximal segment, whereas segments within the bridge exhibited hemodynamic patterns which tend to discourage atheroma development.
AB - Computational fluid dynamics (CFD) modeling of myocardial bridging (MB) remains challenging due to its dynamic and phasic nature. This study aims to develop a patient-specific CFD model of MB. There were two parts to this study. The first part consisted of developing an in silico model of the left anterior descending (LAD) coronary artery of a patient with MB. In this regard, a moving-boundary CFD algorithm was developed to simulate the patient-specific muscle compression caused by MB. A second simulation was also performed with the bridge artificially removed to determine the hemodynamics in the same vessel in the absence of MB. The second part of the study consisted of hemodynamic analysis of three patients with mild and moderate and severe MB in their LAD by means of the developed in silico model in the first part. The average shear stress in the proximal and bridge segments for model with MB were significantly different from those for model without MB (proximal segment: 0.32 ± 0.14 Pa (with MB) versus 0.97 ± 0.39 Pa (without MB), P < 0.0001-bridge segment: 2.60 ± 0.94 Pa (with MB) versus 1.50 ± 0.64 Pa (without MB), P < 0.0001). When all three patients were evaluated, increasing the degree of vessel compression shear stress in the proximal segment decreased, whereas the shear stress in the bridge segment increased. The presence of MB resulted in hemodynamic abnormalities in the proximal segment, whereas segments within the bridge exhibited hemodynamic patterns which tend to discourage atheroma development.
KW - computational fluid dynamics
KW - Coronary artery
KW - hemodynamics
KW - myocardial bridging
UR - http://www.scopus.com/inward/record.url?scp=85047920539&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/record.url?scp=85056880237&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/LP150100574
UR - https://doi.org/10.1115/1.4041903
U2 - 10.1115/1.4040127
DO - 10.1115/1.4040127
M3 - Article
C2 - 29801175
AN - SCOPUS:85047920539
SN - 0148-0731
VL - 140
SP - 1
EP - 11
JO - Journal of Biomechanical Engineering
JF - Journal of Biomechanical Engineering
IS - 9
M1 - 091010
ER -