Wall Shear Stress and Pressure Distribution on Aneurysms and Infundibulae in the Posterior Communicating Artery Bifurcation

Baek, Hyoungsu; Jayaraman, Mahesh; Karniadakis, George Em

doi:10.1007/s10439-009-9794-y

Cited by 47 publications

(26 citation statements)

References 54 publications

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“…As previously reported by Chien et al 6 and Baek et al, 27 aneurysm and vascular shape affect pulsatile flow properties at the aneurysm site. These effects are made especially clear when a single, standard flow profile is used for hemodynamic analysis of all cases, as is the standard method and was done in this research.…”

Section: Discussionsupporting

confidence: 56%

Morphologic and Hemodynamic Risk Factors in Ruptured Aneurysms Imaged before and after Rupture

Chien¹,

Sayre

2014

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE:Due to limited information about aneurysm natural history, choosing the appropriate management strategy for an unruptured aneurysm is challenging. By comparing unruptured and ruptured cases, studies have identified a variety of aneurysm morphologic and hemodynamic properties as risk factors for rupture. In this study, we investigated changes in 4 ruptured aneurysms before and after rupture and tested whether previously published risk factors identified a risk before rupture.

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Section: Discussionsupporting

confidence: 56%

Morphologic and Hemodynamic Risk Factors in Ruptured Aneurysms Imaged before and after Rupture

Chien¹,

Sayre

2014

AJNR Am J Neuroradiol

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“…5,33 Computer simulations provide a relatively straightforward way to explore the effect of geometry on flow characteristics, such as wall shear stress (WSS). Although computer simulations can predict the fluid dynamics in anatomically realistic in vitro models, 3 assumptions are inevitably made in such models. For example, assuming rigid vessel walls and Newtonian flow, 2,32 which may not be sufficiently physiologically realistic, requires that validation with in vivo data should be conducted wherever possible.…”

Section: Introductionmentioning

confidence: 99%

X-ray Velocimetry and Haemodynamic Forces Within a Stenosed Femoral Model at Physiological Flow Rates

et al. 2011

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High resolution in vivo velocity measurements within the cardiovascular system are essential for accurate calculation of vessel wall shear stress, a highly influential factor for the progression of arterial disease. Unfortunately, currently available techniques for in vivo imaging are unable to provide the temporal resolution required for velocity measurement at physiological flow rates. Advances in technology and improvements in imaging systems are allowing a relatively new technique, X-ray velocimetry, to become a viable tool for such measurements. This study investigates the haemodynamics of pulsatile blood flow in an optically opaque in vitro model at physiological flow rates using X-ray velocimetry. The in vitro model, an asymmetric stenosis, is designed as a 3:1 femoral artery with the diameter and flow rate replicating vasculature of a mouse. Velocity measurements are obtained over multiple cycles of the periodic flow at high temporal and spatial resolution (1 ms and 29 μm, respectively) allowing accurate measurement of the velocity gradients and calculation of the wall shear stress. This study clearly illustrates the capability of in vitro X-ray velocimetry, suggesting it as a possible measurement technique for future in vivo vascular wall shear stress measurement.

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“…This approach was considered because we found that the ID of the PCo-A had a wide junction with the internal carotid artery, making full clipping quite difficult similar to wide-necked aneurysms [21]. Moreover, a previous study has shown that the bleeding points in the ruptured ID of the PCo-A were mostly located at the distal side of the ID, close to the internal carotid artery [22]. Under such circumstances, blood could still flow into the inside of the ID along the PCo-A even when the origin of the ID is clipped.…”

Section: Discussionmentioning

confidence: 99%

Endovascular Embolization of Ruptured Infundibular Dilation of Posterior Communicating Artery: A Case Report

Wang²,

Xu³

et al. 2010

Case Reports in Medicine

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Hemorrhage due to the rupture of the infundibular dilatation of the posterior communicating artery (ID of the PCo-A) occurs infrequently. The preferred treatment of such hemorrhages is surgical clipping through craniotomy. There are few reports about endovascular coil embolization in such cases. We report such a case treated by endovascular embolization. A 35-year-old man, who had experienced 2 episodes of subarachnoid hemorrhage (SAH), was found to have a ruptured ID of the PCo-A by head computed tomography angiography (CTA) and digital subtraction angiography (DSA). We performed stent-assisted endovascular coil embolization through a combined anterior and posterior circulation approach. Postembolization angiography showed absence of contrast filling of the ID of the PCo-A and nonleakage of the contrast agent. The patient recovered well with no complications. SAH recurrence was not recorded during the 1-year followup. The postoperative angiographic result was good. To our knowledge, this is the first case of hemorrhage due to ruptured ID of the PCo-A that was treated by such a technique.

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Wall Shear Stress and Pressure Distribution on Aneurysms and Infundibulae in the Posterior Communicating Artery Bifurcation

Cited by 47 publications

References 54 publications

Morphologic and Hemodynamic Risk Factors in Ruptured Aneurysms Imaged before and after Rupture

Morphologic and Hemodynamic Risk Factors in Ruptured Aneurysms Imaged before and after Rupture

X-ray Velocimetry and Haemodynamic Forces Within a Stenosed Femoral Model at Physiological Flow Rates

Endovascular Embolization of Ruptured Infundibular Dilation of Posterior Communicating Artery: A Case Report

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