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Artykuły w czasopismach na temat „Arterial stenoses”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Kleinekofort, W., M. Kraemer, C. Rode, and V. Wizemann. "Extracorporeal Pressure Monitoring and the Detection of Vascular Access Stenosis." International Journal of Artificial Organs 25, no. 1 (2002): 45–50. http://dx.doi.org/10.1177/039139880202500108.

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Prospective monitoring of static venous pressure is an established tool to detect outflow stenoses in a vascular access. However, with this method it is not possible to identify vascular stenoses which are localized between the arterial and venous dialysis needle. We describe a new approach based on both static arterial and venous extracorporeal pressures. Pressure data of 9 dialysis patients with normal vascular access function and 9 patients with stenotic access were analyzed. Extracorporeal pressure was found to depend on the position of the heart relative to the extracorporeal blood circui

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2

Planken, R. N., T. Leiner, R. J. Nijenhuis, et al. "Contrast-Enhanced Magnetic Resonance Angiography Findings Prior to Hemodialysis Vascular access Creation: A Prospective Analysis." Journal of Vascular Access 9, no. 4 (2008): 269–77. http://dx.doi.org/10.1177/112972980800900408.

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Purpose To determine prospectively the clinical value of contrast-enhanced magnetic resonance angiography (CE-MRA) for assessment of the arterial inflow and venous outflow prior to vascular access (VA) creation. Methods Seventy-three patients underwent duplex ultrasonography (DUS) and CE-MRA prior to VA creation for detection of stenoses and occlusions. Two observers read the CE-MRA images for determination of inter-observer agreement. A VA was considered functional if it could be used for successful two-needle hemodialysis therapy within 2 months after creation. Results CE-MRA detected 6 sten

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3

Heinen, Stefan GH, Wouter Huberts, Daniel AF van den Heuvel, Frans N. van de Vosse, Jean-Paul PM de Vries, and Tammo Delhaas. "A comparative study of geometry-based methods and intra-arterial pressure measurements to assess the hemodynamic significance of equivocal iliac artery stenoses." Vascular 27, no. 2 (2018): 119–27. http://dx.doi.org/10.1177/1708538118805659.

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Objectives To date, the ultimate decision to treat iliac artery stenoses in patients suffering from symptomatic peripheral arterial disease is based on the patient’s symptoms and on visual inspection of angiographical images. The primary aim of this study was to investigate the accuracy of geometry-based methods (i.e. visual inspection and quantitative vascular analysis (Viewforum version R7.2v1 Advanced vessel analysis, Philips Healthcare, Best, The Netherlands) of 3D rotational angiography) to identify the severity of equivocal iliac artery stenosis in peripheral arterial disease patients wi

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4

MUSTAPHA, NORZIEHA, SANTABRATA CHAKRAVARTY, PRASHANTA K. MANDAL, and NORSARAHAIDA AMIN. "UNSTEADY RESPONSE OF BLOOD FLOW THROUGH A COUPLE OF IRREGULAR ARTERIAL CONSTRICTIONS TO BODY ACCELERATION." Journal of Mechanics in Medicine and Biology 08, no. 03 (2008): 395–420. http://dx.doi.org/10.1142/s0219519408002723.

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A two-dimensional (2D) nonlinear mathematical model to study the response of the pulsatile flow of blood through a couple of irregular stenoses influenced by externally imposed periodic body acceleration is developed. The model is 2D and axisymmetric with an outline of the stenosis obtained from the three-dimensional (3D) casting of a mildly stenosed artery. The combined influence of an asymmetric shape and surface irregularities of the constrictions is explored in a computational study of blood flow through arterial stenoses with 48% areal occlusion. The arterial wall is treated as an elastic

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5

Li, Xiaoyun, Ling Wang, Chi Zhang, et al. "Why Is ABI Effective in Detecting Vascular Stenosis? Investigation Based on Multibranch Hemodynamic Model." Scientific World Journal 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/185691.

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The ankle-brachial index (ABI), defined as the ratio of systolic pressure in the ankle arteries and that in the brachial artery, was a useful noninvasive method to detect arterial stenoses. There had been a lot of researches about clinical regularities of ABI; however, mechanism studies were less addressed. For the purpose of a better understanding of the correlation between vascular stenoses and ABI, a computational model for simulating blood pressure and flow propagation in various arterial stenosis circumstances was developed with a detailed compartmental description of the heart and main a

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6

Hansen, Peter, Kristoffer Hansen, Mads Pedersen, et al. "Atherosclerotic Lesions in the Superficial Femoral Artery (SFA) Characterized with Velocity Ratios using Vector Velocity Ultrasound." Ultrasound International Open 04, no. 03 (2018): E79—E84. http://dx.doi.org/10.1055/a-0637-2437.

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Abstract Purpose Atherosclerotic arteries are challenging to evaluate quantitatively using spectral Doppler ultrasound because of the turbulent flow conditions that occur in relation to the atherosclerotic stenoses. Vector velocity ultrasound is angle independent and provides flow information, which could potentially improve the diagnosis of arterial stenoses. The purpose of the study is to distinguish significant stenoses in the superficial femoral artery (> 50% diameter reduction) from non-significant stenoses based on velocity ratios derived from the commercially available vector velocit

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7

Kleinekofort, W. "Improved Measurement of Vascular Access Pressure." Journal of Vascular Access 3, no. 2 (2002): 58–63. http://dx.doi.org/10.1177/112972980200300203.

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Vascular access stenosis and thrombosis is one of the key problems for hemodialysis patients. Prospective monitoring of static venous dialysis pressures can be applied to detect outflow stenoses in a vascular access. However, the location of stenoses within the access may influence the diagnostic value of venous pressure measurements. Whereas a decrease in access flow occurs with all types of stenosis, strictures within the arterial anastomosis or between arterial and venous dialysis needle cannot be detected with venous pressure measurements alone. A new approach is discussed, which bases on

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8

Santamore, W. P., and A. A. Bove. "A theoretical model of a compliant arterial stenosis." American Journal of Physiology-Heart and Circulatory Physiology 248, no. 2 (1985): H274—H285. http://dx.doi.org/10.1152/ajpheart.1985.248.2.h274.

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Recent clinical and experimental evidence indicates that coronary artery stenoses may rapidly change their size and shape in response to alterations in vasomotor tone and intraluminal pressure. This theoretical study models a partially compliant arterial stenosis to examine the hemodynamic impact of these alterations. In rigid vessels, a 98% reduction in luminal area would predictably produce subendocardial ischemia in the resting state. In contrast, stenoses, with part of the arterial wall normal by the underlying plaque, responded to vasoconstriction and to changes in intraluminal pressure.

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9

Su, C. M., D. Lee, R. Tran-Son-Tay, and W. Shyy. "Fluid Flow Structure in Arterial Bypass Anastomosis." Journal of Biomechanical Engineering 127, no. 4 (2005): 611–18. http://dx.doi.org/10.1115/1.1934056.

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The fluid flow through a stenosed artery and its bypass graft in an anastomosis can substantially influence the outcome of bypass surgery. To help improve our understanding of this and related issues, the steady Navier-Stokes flows are computed in an idealized arterial bypass system with partially occluded host artery. Both the residual flow issued from the stenosis—which is potentially important at an earlier stage after grafting—and the complex flow structure induced by the bypass graft are investigated. Seven geometric models, including symmetric and asymmetric stenoses in the host artery,

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10

Siegel, John M., Christos P. Markou, David N. Ku, and S. R. Hanson. "A Scaling Law for Wall Shear Rate Through an Arterial Stenosis." Journal of Biomechanical Engineering 116, no. 4 (1994): 446–51. http://dx.doi.org/10.1115/1.2895795.

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Atherosclerosis of the human arterial system produces major clinical symptoms when the plaque advances to create a high-grade stenosis. The hemodynamic shear rates produced in high-grade stenoses are important in the understanding of atheromatous plaque rupture and thrombosis. This study was designed to quantify the physiologic stress levels experienced by endothelial cells and platelets in the region of vascular stenoses. The steady hemodynamic flow field was solved for stenoses with percent area reductions of 50, 75, and 90 percent over a range of physiologic Reynolds numbers (100–400). The

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11

Mathur, Vandana S., Robert K. Kerlan, Juliet Melzer, Stephen J. Tomlanovich, and William Amend. "Acute renal allograft dysfunction secondary to suprarenal arterial stenosis: a case series and review of the literature." Clinical Transplantation 12, no. 4 (1998): 333–42. http://dx.doi.org/10.1111/j.1399-0012.1998.tb00978.x.

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Stenosis of vessels proximal to the renal artery is an unusual cause of allograft ischemia. We report four patients who had such ‘suprarenal’ arterial stenoses leading to graft dysfunction that was reversed with revascularization. We additionally review the existing literature on this entity, outline the etiologies of such stenoses, as well as discuss the surgical and non‐surgical therapeutic options in patients with this uncommon cause of allograft dysfunction.

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12

Liu, Biyue, and Dalin Tang. "Influence of Distal Stenosis on Blood Flow Through Coronary Serial Stenoses: A Numerical Study." International Journal of Computational Methods 16, no. 03 (2019): 1842003. http://dx.doi.org/10.1142/s0219876218420033.

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Computer simulations of the blood flow through right coronary arteries with two stenoses in the same arterial segment are carried out to investigate the interactions of serial stenoses, especially the effect of the distal stenosis. Various mathematical models are developed by varying the location of the distal stenosis. The numerical results show that the variation of the distal stenosis has significant impact on coronary hemodynamics, such as the pressure drop, flow shifting, wall shear stress and flow separation. Our simulations demonstrate that the distal stenosis has insignificant effect o

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13

Lorthois, Sylvie, Pierre-Yves Lagre´e, Jean-Pierre Marc-Vergnes, and Francis Cassot. "Maximal Wall Shear Stress in Arterial Stenoses: Application to the Internal Carotid Arteries." Journal of Biomechanical Engineering 122, no. 6 (2000): 661–66. http://dx.doi.org/10.1115/1.1318907.

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Maximal wall shear stress (MWSS) in the convergent part of a stenosis is calculated by the interactive boundary-layer theory. A dimensional analysis of the problem shows that MWSS depends only on a few measurable parameters. A simple relationship between MWSS and these parameters is obtained, validated, and used to calculate the magnitude of MWSS in a carotid stenosis, as a function of the patency of the circle of Willis and the stenotic pattern. This demonstrates the huge effect of collateral pathways. Elevated MWSS are observed even in moderate stenoses, provided they are associated with a c

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14

Cubero, Alain, Javier Ayala, Gadah Hamzeh, Andrés Cortes, June Udaondo, and José Ignacio Aramendi. "Severe Arterial Tortuosity." World Journal for Pediatric and Congenital Heart Surgery 8, no. 2 (2016): 231–34. http://dx.doi.org/10.1177/2150135116629396.

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Arterial tortuosity syndrome is a rare autosomal recessive connective tissue disease characterized by elongation, tortuosity, and aneurysmal formation of the large and middle-sized arteries sometimes associated with stenosis of the pulmonary arteries and/or aorta. We present three cases of severe arterial tortuosity with different manifestations. In two cases, the aortic arch was involved. Angiography showed a very tortuous aortic arch, with many loops and twists and a normal descending aorta. One required operation. The third case presented multiple severe stenoses of both pulmonary arteries

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15

Radford, Dorothy J., and Peter G. Pohlner. "The middle aortic syndrome: an important feature of Williams' Syndrome." Cardiology in the Young 10, no. 6 (2000): 597–602. http://dx.doi.org/10.1017/s1047951100008878.

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AbstractThe middle aortic syndrome, with diffuse narrowing of the thoracic and abdominal aorta, was present in 10 of 18 patients with Williams' syndrome (55%). There were 3 thoracic coarctations, and 2 abdominal coarctations, with gradients greater than 20 mmHg across the zone of narrowing. Seven patients had mild renal arterial stenosis, and 6 had visceral arterial stenoses. Ten were hypertensive. Measured dimensions of the aortic lumen failed to increase with age in 3 males who had serial angiographic studies. One developed mesenteric arterial stenosis, with mild bilateral renal arterial ste

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16

Gul, R., and S. Bernhard. "Optimal measurement locations for diagnosis of aortic abnormalities in a lumped-parameter model of the systemic circulation using sensitivity analysis." International Journal of Biomathematics 10, no. 08 (2017): 1750116. http://dx.doi.org/10.1142/s1793524517501169.

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The basic theme of this work is to identify the optimal measurement locations for pressure and flow in the systemic circulation to detect aortic stenoses and aneurysms in early stages of a disease. For this purpose, a linear elastic lumped parameter model of the fluid dynamical simulator, major arterial cardiovascular simulator (MACSim), is considered and global sensitivity analysis is applied to identify the better measurement locations for pressure and flow in the systemic circulation. The obtained results of sensitivity analysis provide insight that enable the experimentalists to optimize t

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17

Porenta, G., D. F. Young, and T. R. Rogge. "A Finite-Element Model of Blood Flow in Arteries Including Taper, Branches, and Obstructions." Journal of Biomechanical Engineering 108, no. 2 (1986): 161–67. http://dx.doi.org/10.1115/1.3138596.

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A nonlinear mathematical model of arterial blood flow, which can account for tapering, branching, and the presence of stenosed segments, is presented. With the finite-element method, the model equations are transformed into a system of algebraic equations that can be solved on a high-speed digital computer to yield values of pressure and volume rate of flow as functions of time and arterial position. A model of the human femoral artery is used to compare the effects of linear and nonlinear modeling. During periods of rapid alterations in pressure or flow, the nonlinear model shows significantl

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18

Davis, Thomas S., Monica S. Epelman, Peace C. Madueme, Karen S. Bender, and Gul H. Dadlani. "MRI detection of occult venous anomalies in a patient with Williams syndrome: a case report." Cardiology in the Young 30, no. 4 (2020): 568–70. http://dx.doi.org/10.1017/s104795112000030x.

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AbstractWilliams syndrome is a multisystem, congenital disorder which is commonly associated with arterial stenoses: supravalvar aortic stenosis and peripheral pulmonary artery stenosis. Venous abnormalities have not been previously reported in children with Williams syndrome. We present a case of a 3-year-old girl with Williams syndrome and diffuse venous ectasia as detected by MRI.

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19

Geschwind, Herbert J., Bernard Teisseire, Georges Boussignac, and Christian Vieilledent. "Laser angioplasty of arterial stenoses." Cardiovascular and Interventional Radiology 9, no. 5-6 (1986): 313–17. http://dx.doi.org/10.1007/bf02577962.

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20

Higgins, Daniel, William P. Santamore, Paul Walinsky, and Paul Nemir. "Hemodynamics of human arterial stenoses." International Journal of Cardiology 8, no. 2 (1985): 177–92. http://dx.doi.org/10.1016/0167-5273(85)90286-4.

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21

Zelenock, Gerald B. "Brachiocephalic Arterial Occlusions and Stenoses." Archives of Surgery 120, no. 3 (1985): 370. http://dx.doi.org/10.1001/archsurg.1985.01390270108019.

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22

Daniels, I. D., G. M. Berlyne, and R. H. Barth. "Blood Flow Rate and Access Recirculation in Hemodialysis." International Journal of Artificial Organs 15, no. 8 (1992): 470–74. http://dx.doi.org/10.1177/039139889201500805.

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We studied the effect of extracorporeal blood flow rate (BFR) on access recirculation (recirc) in 19 hemodialysis patients. BUN was determined in simultaneous peripheral (P), arterial (A), and venous (V) blood obtained at BFRs of 200, 400 and 600 ml/min. Percent recirc was calculated for each BFR using the formula (P-A) / (P-V) X 100. Venous drip-chamber (VP) and pre-blood-pump (AP) pressures were measured at each BFR. Fistulograms were performed in 10 patients, and stenoses were identified in 5, all at the proximal (arterial) end of the access. Recirc increased with increasing BFR from 200 to

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23

Vajda, Zsolt, Elisabeth Schmid, Thomas Güthe, et al. "The Modified Bose Method for the Endovascular Treatment of Intracranial Atherosclerotic Arterial Stenoses Using the Enterprise Stent." Neurosurgery 70, no. 1 (2011): 91–101. http://dx.doi.org/10.1227/neu.0b013e31822dff0f.

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Abstract BACKGROUND Balloon dilatation and deployment of a self-expanding stent is a safe treatment for intracranial atherosclerotic stenoses. The significant recurrence rate might be related to the high radial force of the Wingspan stent. OBJECTIVE To evaluate the procedural safety and stenosis recurrence rate by the use of a stent with reduced radial force (Enterprise). METHODS Two hundred nine atherosclerotic stenoses (189 patients) were treated (median age, 68 years; 132 male) in a single center. Lesion locations included internal carotid artery (n = 27), middle cerebral artery (n = 62), v

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24

He, Fan, Lu Hua, and Tingting Guo. "Fluid–structure interaction analysis of hemodynamics in different degrees of stenoses considering microcirculation function." Advances in Mechanical Engineering 13, no. 1 (2021): 168781402198901. http://dx.doi.org/10.1177/1687814021989012.

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In developed countries, stenosis is the main cause of death. To investigate hemodynamics within different degrees of stenoses, a stenosis model incorporating fluid–structure interaction and microcirculation function is used in this paper. Microcirculation is treated as a seepage outlet boundary condition. Compliant arterial wall is considered. Numerical simulation based on fluid–structure interaction is performed using finite element method. Our results indicate that (i) the increasing degree of stenosis makes the pressure drop increase, and (ii) the wall shear stress and the velocity in the a

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25

Liebeskind, David S., George A. Cotsonis, Jeffrey L. Saver, Michael J. Lynn, Harry J. Cloft, and Marc I. Chimowitz. "Collateral Circulation in Symptomatic Intracranial Atherosclerosis." Journal of Cerebral Blood Flow & Metabolism 31, no. 5 (2010): 1293–301. http://dx.doi.org/10.1038/jcbfm.2010.224.

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Collateral circulation in intracranial atherosclerosis has never been systematically characterized. We investigated collaterals in a multicenter trial of symptomatic intracranial atherosclerotic disease. Baseline angiography was reviewed for information on collaterals in stenoses of the internal carotid, middle cerebral, vertebral, and basilar arteries. A battery of angiographic scales was utilized to evaluate lesion site, arterial patency, antegrade flow, downstream territorial perfusion, and collateral circulation, blinded to all other data. Collateral circulation was adequately available fo

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26

Layton, K. F., D. F. Kallmes, and H. J. Cloft. "Angioplasty of an Idiopathic Intracranial Arterial Stenosis." Interventional Neuroradiology 12, no. 4 (2006): 307–11. http://dx.doi.org/10.1177/159101990601200403.

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Treatment of symptomatic intracranial atherosclerotic stenosis usually involves maximizing medical therapy. In patients with medically refractory symptoms despite maximum pharmacologic therapy, intracranial angioplasty and/or stenting has become an accepted treatment option. The use of percutaneous transluminal angioplasty (PTA) for idiopathic intracranial stenoses has not been reported to date. We describe a case of idiopathic intracranial stenosis which was refractory to medical therapy and was successfully treated with percutaneous transluminal angioplasty. The presenting symptoms included

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Ghalichi, Farzan, Farzan Ghalichi, Xiaoyan Deng, et al. "Low Reynolds number turbulence modeling of blood flow in arterial stenoses." Biorheology: The Official Journal of the International Society of Biorheology 35, no. 4-5 (1998): 281–94. http://dx.doi.org/10.1177/0006355x1998035004005006.

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Moderate and severe arterial stenoses can produce highly disturbed flow regions with transitional and or turbulent flow characteristics. Neither laminar flow modeling nor standard two‐equation models such as the $k$ ‐ $\varepsilon$ turbulence ones are suitable for this kind of blood flow. In order to analyze the transitional or turbulent flow distal to an arterial stenosis, authors of this study have used the Wilcox low‐ $\mathit{Re}$ turbulence model. Flow simulations were carried out on stenoses with 50, 75 and 86% reductions in cross‐sectional area over a range of physiologically relevant R

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28

Nakamura, Kazuhiro, Kiyoyuki Yanaka, Satoshi Ihara, and Tadao Nose. "Multiple Intracranial Arterial Stenoses around the Circle of Willis in Association with Graves' Disease: Report of Two Cases." Neurosurgery 53, no. 5 (2003): 1210–15. http://dx.doi.org/10.1227/01.neu.0000088808.98592.bf.

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Abstract OBJECTIVE AND IMPORTANCE The association of Graves' disease with multiple intracranial arterial stenoses is rare. CLINICAL PRESENTATION We report on two Japanese women who experienced the concurrence of Graves' disease and cerebral ischemia attributable to multiple intracranial arterial stenoses around the circle of Willis. Clinically, these patients demonstrated hyperthyroidism, goiter, ophthalmopathy, and ensuing ischemic strokes. Cerebral angiography demonstrated multiple intracranial arterial stenoses around the circle of Willis in both cases. These cases did not meet the full dia

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Deyranlou, Amin, Hamid Niazmand, Mahmood-Reza Sadeghi, and Yaser Mesri. "Non-Newtonian effects of blood on LDL transport inside the arterial lumen and across multi-layered arterial wall with and without stenosis." International Journal of Modern Physics C 27, no. 01 (2016): 1650003. http://dx.doi.org/10.1142/s0129183116500030.

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Blood non-Newtonian behavior on low-density lipoproteins (LDL) accumulation is analyzed numerically, while fluid-multilayered arteries are adopted for nonstenotic and 30%–60% symmetrical stenosed models. Present model considers non-Newtonian effects inside the lumen and within arterial layers simultaneously, which has not been examined in previous studies. Navier–Stokes equations are solved along with the mass transport convection–diffusion equations and Darcy’s model for species transport inside the luminal flow and across wall layers, respectively. Carreau model for the luminal flow and the

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Galanski, M., M. Prokop, A. Chavan, C. M. Schaefer, K. Jandeleit, and J. E. Nischelsky. "Renal arterial stenoses: spiral CT angiography." Radiology 189, no. 1 (1993): 185–92. http://dx.doi.org/10.1148/radiology.189.1.8372191.

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Terada, Tomoaki, Mitsuharu Tsuura, Hiroyuki Matsumoto, et al. "Hemorrhagic Complications after Endovascular Therapy for Atherosclerotic Intracranial Arterial Stenoses." Neurosurgery 59, no. 2 (2006): 310–18. http://dx.doi.org/10.1227/01.neu.0000225326.81661.68.

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Abstract OBJECTIVE: Hemorrhagic complications were analyzed in 106 procedures of 99 patients treated with percutaneous transluminal angioplasty (PTA) or stenting for intracranial arterial stenoses. METHODS: Ninety-nine patients with intracranial arterial stenosis were treated with PTA or stenting 106 times from January 1995 to December 2003. Fifty-seven patients had intracranial internal carotid artery stenosis, 23 had middle cerebral artery stenosis, and 19 had vertebrobasilar stenosis. Evaluation of hemodynamic compromise via single-photon emission computed tomography was performed 50 times

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Cavalcanti, S., P. Bolelli, and E. Belardinelli. "Pressure Drops Through Arterial Stenosis Models in Steady Flow Condition." Journal of Biomechanical Engineering 114, no. 3 (1992): 416–18. http://dx.doi.org/10.1115/1.2891404.

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Measures of pressure drops were made in two different plexiglass models of axial-symmetric arterial stenoses. The stenosis models had the same are reduction (86 percent) but were of different length so as to have a different tapering degree. Pressures were measured in steady flow condition at three equidistant points of the stenosis: upstream, in the middle, and downstream. Results indicate that: the upstream-middle pressure drop is independent of tapering degree but is highly influenced by area reduction; moreover it is much greater than the middle-downstream drop. The upstream-middle pressur

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Defrancq, J., G. Trotteur, and R. F. Dondelinger. "Duplex Ultrasonographic Evaluation of Liver Transplants." Acta Radiologica 34, no. 5 (1993): 478–81. http://dx.doi.org/10.1177/028418519303400510.

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Two hundred and twenty-two duplex ultrasonographic examinations were performed on 36 liver transplants in 30 patients over a period of 5 years and 9 months. Positive sonographic findings were correlated with 13 angiographic examinations. Arterial complications included 4 thromboses, 5 stenoses, and one mycotic aneurysm. A false-negative result was obtained in 2 cases of stenosis and a false-positive result in one case of thrombosis. One portal vein thrombosis, 2 stenoses, and 2 cases of portal hypertension were diagnosed correctly. Sensitivity was 87%, specificity 95%, and accuracy 93%. Duplex

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34

Spacek, Miloslav, Jan Vacha, Milan Kaminek, et al. "Comparison of angiographic estimation and invasive hemodynamic measurement of the significance of non-infarct-related residual stenoses in ST-elevation myocardial infarction patients." Archives of Medical Science – Atherosclerotic Diseases 8, no. 1 (2024): 169–76. http://dx.doi.org/10.5114/amsad/172971.

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IntroductionUp to 50% of patients with ST elevation myocardial infarction (STEMI) have ≥ 50% stenosis in a major non-infarct-related artery. Several studies have evaluated the prognostic value of the completion of revascularization with overall inconclusive results. Selection of the stenoses was based on the angiographic evaluation, invasive hemodynamic measurement or the combined approach. It is unknown whether such a selection provides correlation of comparable patient groups.Material and methodsWe enrolled 51 patients (62.7 ±10.2 years) with acute STEMI and at least one residual (50–90%) st

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Strotzer, M., C. M. Fellner, A. Geissler, et al. "Noninvasive Assessment of Renal Artery Stenosis." Acta Radiologica 36, no. 3 (1995): 243–47. http://dx.doi.org/10.1177/028418519503600306.

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The purpose of this study was to evaluate MR angiography (MRA) and color Doppler sonography as noninvasive screening methods in suspected renovascular hypertension. Fifty-five consecutive patients with arterial hypertension were examined prospectively using high resolution 3-D TOF MRA and color Doppler sonography. Intraarterial angiography was the standard of reference. Stenoses of 60% or more were regarded as significant. MR angiograms were evaluated by 3 independent observers who studied 110 main renal arteries. All 8 significant stenoses and 2 occlusions were correctly classified with MRA w

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SARIFUDDIN. "SIMULATION OF CASSON FLUID FLOW AND HEAT TRANSPORT IN DIFFERENTLY SHAPED STENOSES." Journal of Mechanics in Medicine and Biology 14, no. 02 (2014): 1450024. http://dx.doi.org/10.1142/s0219519414500249.

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The present investigation deals with a mathematical model representing the response of heat transfer to blood streaming through the arteries under stenotic condition. The flowing blood is represented as the suspension of all erythrocytes assumed to be Casson fluid and the arterial wall is considered to be rigid having differently shaped stenoses in its lumen arising from various types of abnormal growth or plaque formation. The governing equations of motion accompanied by the appropriate choice of the boundary conditions are solved numerically by Marker and Cell (MAC) method. The necessary che

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Thalhammer, Aschwanden, Husmann, et al. "Clinical relevance of musical murmurs in color-coded duplex sonography of peripheral and visceral vessels." Vasa 40, no. 4 (2011): 302–7. http://dx.doi.org/10.1024/0301-1526/a000119.

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Background: Musical murmurs (MMs) are Doppler phenomena which sound like high-frequency musical sounds. They reflect high and turbulent flow within relevant stenoses and were first described in degenerated bioprosthetic valves and later in intracranial vessels and were associated either with high-grade arterial stenosis, small collateral arteries or carotid cavernous fistulas. Objective of this article is to illustrate the spectrum of imaging of MMs observed in renal, intestinal and peripheral vessels. Patients and methods: Four experienced vascular ultrasound laboratories had been asked to re

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Nakanishi, Toshio, Nobuo Momoi, Hirohide Kobayashi, et al. "Mechanical properties of the pulmonary arteries after the arterial switch operation for complete transposition." Cardiology in the Young 7, no. 3 (1997): 266–76. http://dx.doi.org/10.1017/s1047951100004157.

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AbstractThis study was designed to determine, first, the stiffness of the pulmonary arteries and, second, the relationship between the stiffness of the pulmonary arteries and the success rate of balloon angioplasty in patients with complete transposition after an arterial switch operation. Indexes of pulmonary arterial wall stiffness, percent change in the radius during a cardiac cycle and the pressure elastic modulus, were calculated from the pulmonary arterial pressure and radius measured from a cineangiogram. Of the patients, 13 had no significant stenosis, while 25 had significant stenoses

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Škoda, Ondřej. "Detection and evaluation of vertebral arterial stenoses." Neurologie pro praxi 18, no. 4 (2017): 233–37. http://dx.doi.org/10.36290/neu.2017.091.

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Leopold, Peter W., Benjamin B. Chang, Anna Marie Kupinski, et al. "Flow/velocity characteristics of arterial bypass stenoses." Journal of Surgical Research 46, no. 1 (1989): 23–28. http://dx.doi.org/10.1016/0022-4804(89)90177-7.

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Najeme, A., M. Zagzoule, and J. Mauss. "Numerical analysis of flow in arterial stenoses." Mechanics Research Communications 19, no. 5 (1992): 379–84. http://dx.doi.org/10.1016/0093-6413(92)90015-3.

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Menshikova, I. G., E. V. Magalyas, and I. V. Sklyar. "Characteristics of changes in the coronary arteries in patients with acute coronary syndrome on the background of chronic obstructive pulmonary disease." Bulletin Physiology and Pathology of Respiration, no. 87 (April 3, 2023): 35–41. http://dx.doi.org/10.36604/1998-5029-2023-87-35-41.

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Aim. Study of the nature and characteristics of changes in the coronary bed in patients with acute coronary syndrome (ACS) and chronic obstructive pulmonary disease (COPD).Materials and methods. The study included 85 patients with ACS: group 1 included 47 patients with ACS and COPD, group 2 included 38 patients with ACS. All patients underwent a comprehensive clinical, instrumental and laboratory examination.Results. In the majority of patients of group 1 (76.6%), two- and three-vessel lesions of the coronary bed were revealed, and arterial stenoses were multiple, located mainly in the middle

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MISRA, J. C., A. SINHA, and G. C. SHIT. "THEORETICAL ANALYSIS OF BLOOD FLOW THROUGH AN ARTERIAL SEGMENT HAVING MULTIPLE STENOSES." Journal of Mechanics in Medicine and Biology 08, no. 02 (2008): 265–79. http://dx.doi.org/10.1142/s0219519408002620.

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The present paper is concerned with the study of a mathematical model for the flow of blood through a multi-stenosed artery. Blood is considered here to consist of a peripheral plasma layer which is free from red cells, and a core region which is represented by a Casson fluid. A suitable generalized geometry of multiple stenoses existing in the arterial segment under consideration is taken for the study. A thorough quantitative analysis has been made through numerical computations of the variables involved in the analysis that are of special interest in the study. The computational results are

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Bateman, Grant A., Scott A. Stevens, and Jesse Stimpson. "A mathematical model of idiopathic intracranial hypertension incorporating increased arterial inflow and variable venous outflow collapsibility." Journal of Neurosurgery 110, no. 3 (2009): 446–56. http://dx.doi.org/10.3171/2008.6.17609.

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Object A collapsible segment in the venous outflow has been noted in many patients with idiopathic intracranial hypertension (IIH). Mathematical modeling has shown that these collapsible segments can account for the elevated cerebrospinal fluid (CSF) pressures associated with IIH. However, the model required an elevated outflow resistance of up to 10 times normal to predict the CSF pressures actually found clinically. Measurement of blood flow in patients with IIH has shown that inflow rates vary, with higher rates noted in patients with lesser outflow stenoses. The aim of this work was to ext

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Yokote, H., T. Terada, K. Ryujin, et al. "Percutaneous Transluminal Angioplasty for Intracranial Arteriosclerotic Lesions." Interventional Neuroradiology 3, no. 2_suppl (1997): 41–46. http://dx.doi.org/10.1177/15910199970030s206.

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Recent developments of the interventional neuroradiological technique made percutaneous transluminal angioplasty (PTA) possible even for intracranial arteries1. We report our experiences of 17 cases treated by PTA including 9 intracranial internal carotid (ICA), 4 middle cerebral (MCA) and 4 vertebro-basilar arterial (VBA) stenoses and discuss the problems of the procedure. All patients had cerebral ischemic symptoms and stenoses more than 60% calculated angiographically. Three of them were treated by PTA for residual stenoses after thrombolytic therapy for acute occlusion. We used PTA balloon

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Capisizu, Adriana S., Dragoș Cuzino, and Silviu M. Stanciu. "The Role of Coronary CT Angiography in the Management of Patients with Coronary Atherosclerotic Diseas." Romanian Journal of Military Medicine 126, no. 2 (2023): 160–65. http://dx.doi.org/10.55453/rjmm.2023.126.2.6.

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"Coronary CT angiography is a non-invasive method of analyzing the coronary lumen through which the atheromatous bur-den can be evaluated, with the analysis of the type of plaque (soft, calcified, mixed) and the impact on the arterial lumen (stenosis, occlusion). The anatomical evaluation by coronary CT is indicated in symptomatic patients with low and medium risk factors for coronary atherosclerotic disease, in those with inconclusive laboratory and EKG results, patients with un-certain stress test results, in the evaluation of coronary grafts and intrastent stenoses. Depending on the result

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Sarshayev, Marat, Shayakhmet Makhanbetkhan, Aiman Maidan, et al. "Single-Stage Endovascular Management of Concurrent Intracranial Aneurysms and Arterial Stenoses: Clinical Outcomes, Procedural Strategies, and Predictive Factors." Brain Sciences 15, no. 7 (2025): 744. https://doi.org/10.3390/brainsci15070744.

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Background: The coexistence of extracranial arterial stenoses and intracranial aneurysms presents a unique clinical dilemma. While staged interventions are traditionally preferred to reduce procedural risks, recent advances have enabled single-stage endovascular treatment. This study evaluates the clinical outcomes, procedural strategies, and predictive factors associated with such combined interventions. Methods: This retrospective study included 47 patients treated with single-stage endovascular procedures for concurrent extracranial stenosis and intracranial aneurysm between 2016 and 2024.

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Dusick, Joshua R., David S. Liebeskind, Jeffrey L. Saver, Neil A. Martin, and Nestor R. Gonzalez. "Indirect revascularization for nonmoyamoya intracranial arterial stenoses: clinical and angiographic outcomes." Journal of Neurosurgery 117, no. 1 (2012): 94–102. http://dx.doi.org/10.3171/2012.4.jns111103.

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Object Symptomatic intracranial arterial stenoses have a high rate of recurrent stroke despite medical and endovascular treatments. The authors present clinical and angiographic quantitative outcomes of indirect revascularization for patients with symptomatic intracranial stenosis. Methods Patients treated for symptomatic intracranial arterial stenosis by indirect revascularization were included. The patient population comprised those in whom medical management had failed and for whom endovascular therapy was unsuitable or had failed. Patients underwent encephaloduroarteriosynangiosis (EDAS) w

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SCHOENBERG, STEFAN O., MICHAEL BOCK, FRIEDRICH KALLINOWSKI, and ARMIN JUST. "Correlation of Hemodynamic Impact and Morphologic Degree of Renal Artery Stenosis in a Canine Model." Journal of the American Society of Nephrology 11, no. 12 (2000): 2190–98. http://dx.doi.org/10.1681/asn.v11122190.

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Abstract. In a noninvasive comprehensive magnetic resonance (MR) examination, the morphologic degree of renal artery stenosis was correlated to corresponding changes in renal artery flow dynamics. Different degrees of stenosis were created with the use of a chronically implanted inflatable arterial cuff in seven dogs. For each degree of stenosis, an ultrafast three-dimensional gadolinium MR angiography with high spatial resolution was performed, followed by cardiac-gated MR flow measurements with high temporal resolution for determination of pulsatile flow profiles and mean flow. Flow was also

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Provenzano, Paolo P., and Christopher J. Rutland. "A boundary layer model for wall shear stress in arterial stenosis." Biorheology: The Official Journal of the International Society of Biorheology 39, no. 6 (2002): 743–54. http://dx.doi.org/10.1177/0006355x2002039006001.

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This paper proposes a model for wall shear stress in arterial stenosis based on boundary layer theory. Wall shear stress estimates are obtained by solving the momentum integral equation using the method proposed by Walz and applying this method to various stenosis geometries for Reynolds numbers (Re) of Re=59–1000. Elevated wall shear stress may be of importance when considering thrombosis and vascular erosion in stenosis, as well as the potential for debris from the stenotic area to ‘break away’ and cause further pathology. The values of shear stress obtained using the model in this study agr

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