Results 11 to 20 of about 11,439 (75)

Phase changes of the flow rate in the vertebral artery caused by debranching thoracic endovascular aortic repair: effects of flow path and local vessel stiffness on vertebral arterial pulsation [PDF]

open access: yes
Despite numerous studies on cerebral arterial blood flow, there has not yet been a comprehensive description of hemodynamics in patients undergoing debranching thoracic endovascular aortic repair (dTEVAR), a promising surgical option for aortic arch aneurysms.
arxiv   +1 more source

Inference of gene loss rates after whole genome duplications at early vertebrates through ancient genome reconstructions [PDF]

open access: yesarXiv, 2018
The famous 2R hypothesis was first proposed by Susumu Ohno in 1970. It states that the two whole genome duplications had shaped the genome of early vertebrates. The most convincing evidence for 2R hypothesis comes from the 4:1 ratio chromosomal regions that have preserved both gene content and order in vertebrates compared with closely related. However,
arxiv  

Steroid Receptors and Vertebrate Evolution [PDF]

open access: yesarXiv, 2019
Considering that life on earth evolved about 3.7 billion years ago, vertebrates are young, appearing in the fossil record during the Cambrian explosion about 542 to 515 million years ago. Results from sequence analyses of genomes from bacteria, yeast, plants, invertebrates and vertebrates indicate that receptors for adrenal steroids (aldosterone ...
arxiv  

Fused Segmentation of Geometric Models for Myocardium and Coronary Artery via Medial Axis [PDF]

open access: yesarXiv, 2017
Coronary arteries and their branches supply blood to myocardium. The obstruction of coronary arteries results in significant loss of myocardium, called acute myocardial infarction, and the number one cause of death globally. Hence, quantification of the regional amount of heart muscle subtended by obstructed coronary arteries is of critical value in ...
arxiv  

The role of vascular complexity on optimal junction exponents [PDF]

open access: yesarXiv, 2020
We examine the role of complexity on arterial tree structures, determining globally optimal vessel arrangements using the Simulated AnneaLing Vascular Optimization (SALVO) algorithm, which we have previously used to reproduce features of cardiac and cerebral vasculatures.
arxiv  

Modeling the Safety Effect of Access and Signal Density on Suburban Arterials: Using Macro Level Analysis Method [PDF]

open access: yesarXiv, 2018
With rapidly increasing of the land development density along suburban arterials, much more irregular signal spacing appeared on suburban arterials, and high access density is commonly observed on suburban arterials. These issues tend to increase the risk of crash occurrence of arterials.
arxiv  

Dynamic-Computed Tomography Angiography for Cerebral Vessel Templates and Segmentation [PDF]

open access: yesarXiv
Background: Computed Tomography Angiography (CTA) is crucial for cerebrovascular disease diagnosis. Dynamic CTA is a type of imaging that captures temporal information about the We aim to develop and evaluate two segmentation techniques to segment vessels directly on CTA images: (1) creating and registering population-averaged vessel atlases and (2 ...
arxiv  

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