Bending and twisting of an in vivo coronary artery at a bifurcation

Pao, Y. C.; Lu, Jing; Ritman, Erik L.

doi:10.1016/0021-9290(92)90026-w

Cited by 71 publications

(40 citation statements)

References 8 publications

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“…beat induce a cyclic flexion (bending and twisting) of the coronary vessels, especially at bifurcations [39], and it has been hypothesized that this repeated torsion contributes to the development of atherosclerotic lesions [40].…”

Section: Introductionmentioning

confidence: 99%

Mechanotransduction by Vascular Smooth Muscle

1995

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Mechanotransduction by vascular smooth muscle (VSM) is defined as a cellular response (contraction, secretion, growth, division) to transmural pressure or stretch. This review includes an overview of the physical forces VSM cells experience in vivo, consideration of experimental techiques used to study VSM mechanotransduction, and a discussion of the scientific literature pertinent to the individual cellular components that have been implicated in the transduction of physical forces. These include: the extracellular matrix, integrins, ion channels, the sarcoplasmic reticulum, second messenger systems, contractile proteins, and the cytoskeleton.

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Section: Introductionmentioning

confidence: 99%

Mechanotransduction by Vascular Smooth Muscle

1995

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“…The structural features of the vascular walls are more marked with increasing discrepancy under functioning conditions. The major branches of coronary arteries located in grooves above the cardiac muscle under the epicardium and branching into the mass of the myocardium to smaller arteries are tightly pressed to the myocardium and continuously undergo relaxation and compression with the myocardium in cardiac systole and diastole [26]. These anatomical and hemodynamic features are possibly the major specific reasons for early atherosclerosis in human coronary arteries.…”

Section: Discussionmentioning

confidence: 99%

Features of biomechanical properties of human coronary arteries

1999

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“…A large absolute torsion correlates with the occurrence of vascular pathologies. Similar investigations of the torsion based on tomographic data are made for the coronary artery (Pao et al, 1992;Puentes et al, 1998;Medina et al, 2004;Zhenga and Qib, 2011;Strandmark et al, 2013) and for the superficial femoral arteries (Wood et al, 2006). The methodology in medical applications differs from that in other fields of application.…”

Section: Introductionmentioning

confidence: 97%

“…A similar concept is used in Medina et al (2004) and Lewinger et al (2005), where models of continuous curves are fitted to discrete ones by least-squares methods, and the continuous curve representations are again used for torsion assessment. In Pao et al (1992) and Crenshaw et al (2000), cubic splines are fitted to the positions of anatomic landmarks and organisms, respectively. Mokhtarian (1997) follows a multiscale description of curve shape and applies anisotropic Gaussian smoothing to attenuate discretization effects on torsion estimations.…”

Section: Introductionmentioning

confidence: 99%

Estimating Torsion of Digital Curves Using 3d Image Analysis

Blankenburg¹,

Daul²,

Ohser³

2016

Image Anal Stereol

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Curvature and torsion of three-dimensional curves are important quantities in fields like material science or biomedical engineering. Torsion has an exact definition in the continuous domain. However, in the discrete case most of the existing torsion evaluation methods lead to inaccurate values, especially for low resolution data. In this contribution we use the discrete points of space curves to determine the Fourier series coefficients which allow for representing the underlying continuous curve with Cesàro's mean. This representation of the curve suits for the estimation of curvature and torsion values with their classical continuous definition. In comparison with the literature, one major advantage of this approach is that no a priori knowledge about the shape of the cyclic curve parts approximating the discrete curves is required. Synthetic data, i.e., curves with known curvature and torsion, are used to quantify the inherent algorithm accuracy for torsion and curvature estimation. The algorithm is also tested on tomographic data of fiber structures and open foams, where discrete curves are extracted from the pore spaces.

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Bending and twisting of an in vivo coronary artery at a bifurcation

Cited by 71 publications

References 8 publications

Mechanotransduction by Vascular Smooth Muscle

Mechanotransduction by Vascular Smooth Muscle

Features of biomechanical properties of human coronary arteries

Estimating Torsion of Digital Curves Using 3d Image Analysis

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