BACKGROUND AND PURPOSE Significant extracranial stenosis of the ICA is a known risk factor for future stroke and it has been shown that revascularization reduces the risk of future stroke. We applied BOLD fMRI in patients with carotid artery stenosis before and after CEA. Our purpose was to determine whether fMRI is able to demonstrate impaired CVR and to identify patient parameters that are as...

BACKGROUND AND PURPOSE Acute cerebral ischemic events are associated with rupture of vulnerable carotid atheroma and subsequent thrombosis. Factors such as luminal stenosis and fibrous cap thickness have been thought to be important risk factors for plaque rupture. We used a flow-structure interaction model to simulate the interaction between blood flow and atheromatous plaque to evaluate the e...

This paper presents a numerical study of the behaviour of wall shear stress (WSS) in three-dimensional pulsatile flow through an axisymmetric stenosed artery. A realistic blood flow rate (250 ml min−1 at rest in coronary artery [7]) and cardiac cycle (T=0.84s [5]) are applied in the simulations. The flow is fully three-dimensional, and the fluid is assumed to be Newtonian and incompressible. Di...

         Combination of congenital esophageal atresia and subsequent hypertrophic pyloric stenosis is a rare condition which occurs in early infancy. The underlying etiology and pathophysiology of this association still remains unclear. In this paper we report a unique case of hypertrophic pyloric stenosis, for the first time, which occurred in an infant who underwent surgery for type I esophag...

The purpose of this study is to develop a mathematical model for studying the magnetic field effect on blood flow through an axially non-symmetric but radially symmetric atherosclerotic artery. Herschel-Bulkley equation has been taken to represent the non-Newtonian character of blood. The response of magnetic field, stenosis height, shape parameter on velocity, volumetric flow rate in stenotic ...

A 36-year-old woman presented with high grade peptic stenosis in the distal esophagus (●" Fig.1). After three consecutive sessions of steroid injection/dilation with disappointing results, a biodegradable polydioxanone esophageal stent (SXElla-BD, 25×80 mm; Ella-CS, r. s.o., Hradec Kràlové, Czech Republic) was inserted (●" Fig.2). The patient experienced retrosternal pain for a short period of ...

background: atrial fibrillation (af) is prevalent among cardiac patients; and as the risk of thromboembolism is high in this arrhythmia, discrimination of the effective risk factors in producing left atrial (la) thrombosis is clinically important. the molecular structure of lipoprotein(a) [lp(a)] is very similar to plasminogen , so it can be hypothesized that the high level of lp(a) is a compro...

a fifteen-year-old torkaman girl with turner's mosaic kariotype is presented. she has had congenital esophageal stenosis with severe dysphagia since birth and iron deficincy anemia in addition to other classical features of the syndrome. according to author's knowledge this is the first report of a new congenital structural gastrointestinal anomaly with this disease.

introduction: first branchial cleft anomalies manifest with duplication of the external auditory canal.   case report: this report features a rare case of microtia and congenital middle ear and canal cholesteatoma with first branchial fistula. external auditory canal stenosis was complicated by middle ear and external canal cholesteatoma, but branchial fistula, opening in the zygomatic root and...

objectives to evaluate predictive value of vessel specific coronary artery calcium (cac) score in predicting obstructive coronary artery disease. patients and methods in this diagnostic test study we evaluated patients with coronary computed tomography angiography (ccta) and cac score which had been referred to two referral radiology center in tehran, iran and finally we selected 2525 patients ...