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Chest imaging
Published in Sarah McWilliams, Practical Radiological Anatomy, 2011
o In coronary dominance, the dominant vessel supplies the left ventricle mainly. In left coronary dominance the left coronary artery supplies the left ventricle. Coronary dominance indicates the coronary artery that supplies the posterior descending branch to the inferior surface of the heart. Right dominance is most common.
A computational fluid dynamics study pre- and post-fistula closure in a coronary artery fistula
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2020
Haoyao Cao, Yue Qiu, Ding Yuan, Jianqun Yu, Da Li, Yi Jiang, Li Su, Liqing Peng, Tinghui Zheng
Because a CAF generally have a dilated fistula, so just like this particular CAF patient, the fistula not only leads to myocardium ischemia but also inadequate perfusion to the ascending aorta. This could explain why there are some untreated CAF patients develop cardiac failure or pectoris angina depending on the flow volume entering the right ventricle via the fistula orifice and stealing flow volume from the left coronary artery and ascending aorta (Buccheri et al. 2018; Yun et al. 2018). Moreover, as it indicated by this CFD simulation that a severely dilated fistula is always associated with aberrant WSS and flow pattern which might predispose the formation of thrombosis and atherosclerosis and further expansion of the vessel wall (Kulcsár et al. 2012; Hazan et al. 2018). Accordingly, a timely treatment to a CAF accompanying with coronary dilatation or aneurysms is suggested to prevent the further deterioration of the blood stealing phenomena (Gowda et al. 2011).
Numerical study of multivessel coronary plaque hemodynamics
Published in International Journal for Computational Methods in Engineering Science and Mechanics, 2019
Hossein Mohammadi, Raymond Cartier, Gilles Soulez, Rosaire Mongrain
Medical imaging techniques have limited capability to perform functional assessment of the coronary plaques. Accordingly, in order to improve the understanding of the formation and development of plaques, numerical methods has been widely used to study blood flow characteristics through the coronary arteries over the last few years [11]–[14]. Only few studies have investigated the dynamics of coronary lesions by mainly considering the impact of plaque severity on hemodynamic conditions using regional computational fluid dynamics (CFD) models of coronary arteries, i.e., either the left coronary artery or the right coronary artery [11], [15], and [16]. It is hypothesized that configuration of coronary lesions plays a key role in haemodynamic interactions between stenoses and could be the main determinant of the lesion physiological severity. We have recently developed a 3D fluid–structure interaction (FSI) model of the aortic valve region incorporating anatomically inspired small coronary vessels and investigated the association between the aortic valve impairment and abnormal coronary hemodynamic conditions [17]–[19]. In the current study, this computational model is employed to investigate the potential intricate hemodynamic interactions between multiple coronary lesions and assess the functional impact of different coronary multilesional configurations as a function of lesion severity.
Automatic 3-D tubular centerline tracking of coronary arteries in coronary computed tomographic angiography
Published in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2018
Nasrin Salehi, Ahmad Reza Naghsh-Nilchi
We used Frangi’s vesselness filter (Frangi et al. 1998) to find right and left coronary artery origins as the most prominent small tubular structures surrounding aorta. This filter was originally presented by Frangi et al. as a vesselness measure based on eigenvalues of hessian image with the purpose of developing a vessel enhancement filter. Among points with the most vesselness filter, we select two points with smallest axial slice number that are located in surface of a tube with a radius close to average aorta radius. Figure 5 shows vesselness filter applied in aorta region and selected left and right coronary artery origins.