Search Results
Results 401 - 450 of 2017
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Unzué Leire - - 2013
The optimal percutaneous treatment strategy for coronary bifurcation lesions is still unknown. Several dedicated coronary bifurcation stents, such as the Tryton Side Branch Stent (TM) (Tryton Medical, Durham, NC, USA) have been developed to improve clinical outcomes. We present a double bifurcation lesion case treated with two Tryton sidebranch stents, ...
Ito Joji - - 2013
OBJECTIVES: We evaluated the utility of novel simulator for off-pump coronary artery bypass grafting for surgical residents. METHODS: The novel simulator system "BEAT, YOUCAN" has 2 components. (1) A pink disposable silicone vessel model having a 3-layer structure mimicking the internal mammary artery. The disposable silicone vessels mimicking the coronary ...
Yokoyama Shinya - - 2013
We report a successful one-stage biventricular repair of truncus arteriosus communis with interrupted aortic arch in a neonate. This newborn girl was diagnosed with truncus arteriosus communis type III-B (Congenital Heart Surgeons Society classification) by the echocardiography and three-dimensional computed tomography. We present a new reconstructive approach for such heart ...
Guneyli Serkan - - 2013
To investigate possible protrusions through stent cells, and the factors affecting protrusions after carotid angioplasty and stenting (CAS). This ex-vivo clinical study was performed between July 2010 and August 2011 at the Department of Radiology, Ege University School of Medicine, Izmir, Turkey. After approval by the Institutional Board, 15 successive ...
Claiborne Thomas E - - 2013
Calcific aortic valve disease is the most common and life threatening form of valvular heart disease, characterized by stenosis and regurgitation, which is currently treated at the symptomatic end-stages via open-heart surgical replacement of the diseased valve with, typically, either a xenograft tissue valve or a pyrolytic carbon mechanical heart ...
Lee Won-Jeong - - 2013
The purpose of this study was to evaluate the relationship of pulmonary function impairment (PFI) and coronary artery calcification (CAC) by multi-detector computed tomography (MDCT), and the effect of pneumoconiosis on CAC or PFI. Seventy-six subjects exposed to inorganic dusts underwent coronary artery calcium scoring by MDCT, spirometry, laboratory tests, ...
Sait Doğan Mehmet - - 2013
Aim To evaluate the eficacy of the Cardiac Magnetic Resonance Perfusion (CMRP) method in detection of Coronary Artery Disease (CAD) by comparing CMRP indings with the results of Coronary Computed Tomography Angiography (CCTA) or Catheter Coronary Angiography (CCA). Methods Thirty one patients in whom CMRP was performed along with CCTA ...
Mahnken Andreas H - - 2013
BACKGROUND: Aortic thrombi in the ascending aorta or aortic arch are rare but are associated with a relevant risk of major stroke or distal embolization. Although stent grafting is commonly used as a treatment option in the descending aorta, only a few case reports discuss stenting of the aortic arch ...
Bassano Carlo - - 2013
Several methods have been proposed to avoid cerebral damage during aortic arch surgery. Antegrade, bilateral, selective cerebral perfusion is probably the most efficient one, although it has some drawbacks, such as air or particulate embolism risk, limitation in operative field visibility, and interactions with surgical maneuvers. We describe a surgical ...
Teitelbaum Aaron A AA Schulich Heart Centre, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, ON, - - 2013
Percutaneous revascularisation of chronic total occlusions (CTO) is limited by failure of guidewire crossing. Neovascularisation within the proximal CTO segment may be important for guidewire crossing and dramatically declines in CTO beyond six weeks of age. The aims of the current study were to determine whether local delivery of a ...
Bozkurt A - - 2013
Woven coronary artery is an extremely rare and not clearly defined congenital malformation in which the epicardial coronary artery is divided into multiple thin channels. These multiple channels merge again into a normal conduit. This anomaly is a benign condition because there is normal blood flow after the anomalous segment ...
Yuan Li-Jun - - 2013
OBJECTIVE: Whether the regional elastic arteries is stiffened in preeclampsia has less been investigated. This study was aimed to characterize in vivo the carotid arterial intima-media thickness (IMT) and mechanical properties in women with preeclampsia by employing a radio-frequency ultrasound technique. METHODS: Twenty-two preeclampsia women and 28 age- and gestational-week ...
Prabhu Somnath J - - 2013
BACKGROUND: Percutaneous arterial closure devices have increasingly entered clinical practice to assist in achieving femoral arterial access site hemostasis. Prior studies have demonstrated the safety and efficacy of several arterial closure devices in adults. OBJECTIVE: To evaluate the efficacy of using an arterial closure device in children. MATERIALS AND METHODS: ...
Canaud Ludovic - - 2013
OBJECTIVE: Poor aortic arch apposition increases the risk of technical failure after thoracic endovascular repair. The aim of this study was to assess the conformability of the latest generation of thoracic stent grafts in relation to the degree of device oversizing and aortic arch angulation. METHODS: A benchtop pulsatile flow ...
Bredahl K - - 2013
OBJECTIVE: No standardised ultrasound procedure to obtain reliable growth estimates for abdominal aortic aneurysms (AAA) is currently available. We investigated the feasibility and reproducibility of a novel approach controlling for a combination of vessel wall delineation and cardiac cycle variation. DESIGN: Prospective comparative study. METHODS: Consecutive patients (N = 27) with an ...
Gutierrez Jose - - 2013
BACKGROUND AND PURPOSE: Dolichoectasia (DE) is a vasculopathy that consists of abnormal elongation and dilatation of arteries. The objective of this study is to evaluate the frequency of DE in an unselected population and assess different diagnostic methods. METHODS: The Northern Manhattan Study is a multiethnic population based cohort of ...
Tachibana Kazutoshi - - 2013
In mitral valvuloplasty, the saline injection test is commonly employed. However, discrepancies in regurgitation between the naked eye findings during the saline injection test and the postoperative echocardiographical findings are noted. Here, we describe a technique that allows direct transatrial evaluation of the valve in the fully loaded, beating heart ...
Bhatla Puneet - - 2013
Thoracic aortic disease is a known cause of aortic dilatation and poses significant risk of aortic dissection and rupture. Serial assessment of aortic root dimensions is traditionally performed using echocardiography, which is limited with older age and following surgery, due to poor acoustic windows. Although diastolic measurements are utilized as ...
Choi Hyo Won - - 2013
In vivo, the position of the conductance catheter to measure vessel lumen cross-sectional area may vary depending on where the conductance catheter is deployed in the complex anatomical geometry of arteries, including branches, bifurcations, or curvatures. The objective here is to determine how such geometric variations affect the CSA estimates ...
Mahajan Amit K AK University of Chicago Medical Center, Chicago, IL 60637, USA. - - 2013
Alveolar-pleural fistulas causing persistent air leaks are conditions associated with prolonged hospital courses, high morbidity, and possibly increased mortality. Intrabronchial valves serve as a noninvasive therapeutic option for the closure of alveolar-pleural fistulas. The present review describes a brief history of, and indications for, the placement of intrabronchial valves in ...
Rachev Alexander - - 2013
Arteries manifest a remodeling response to long-term alterations in arterial pressure and blood flow by changing geometry, structure, and composition through processes driven by perturbations of the local stresses in the vascular wall from their baseline values. The objective of this study is twofold-to develop a general method for calculating ...
Hsu Shih-Wei - - 2013
OBJECTIVE: Deployment of a Neuroform microstent (NFM) within acutely angled geometry may result in substantial deformations. This in vitro study was conducted to validate a novel alternative technique, consisting of intentional deployment of a NFM straight on into a terminus aneurysm, by assessing the mechanics, feasibility, and stability of the ...
Petzoldt Martin - - 2013
PURPOSE: Transcardiopulmonary thermodilution (TPTD, SV(TD)) as well as calibrated (SV(PC CAL)) and uncalibrated (SV(PC UNCAL)) arterial pulse contour analysis (PC) are increasingly promoted as less-invasive technologies to measure stroke volume (SV) but their reliability in aortic valve disease was unknown. The objective of this prospective study was to investigate the ...
Machida H - - 2013
BACKGROUND AND PURPOSE:Improved CTA delineation of arteries and unruptured aneurysms is clinically desired in the posterior fossa. We present a novel model-based iterative reconstruction that models system statistics and optics to improve CT image quality. We investigated the utility of MBIR for improving delineation of arteries in the posterior fossa ...
Wang Charlie - - 2013
OBJECTIVE: A study on factors of material costs in endovascular coil embolization has not been previously reported. The aim of this study was to assess the effect of aneurysm size and other factors on implanted coil costs. METHODS: Implanted coil costs were retrospectively obtained for all 387 consecutive aneurysm coiling ...
Yang Xiaoyuan - - 2013
The development of a small diameter (≤5 mm) arterial prosthesis requires the appropriate selection of materials, structure and fabrication method so as to provide adequate mechanical properties, superior biocompatibility and precise control over the diameter. In this study, 100% polyester, 100% silk fibroin and a combination of both yarns were ...
Tanemura Hiroshi - - 2013
Stent-assisted coil embolization has enabled the endovascular treatment of wide-necked cerebral aneurysms. Moreover, recent reports demonstrated that stent-assisted coil embolization was associated with a significant decrease in angiographic recurrences of coiled cerebral aneurysms. One of the possible explanations for this adjunctive effect of stent-assisted coil embolization is changes in the ...
Mohd Rizal M Y - - 2013
Dieulafoy's lesion is one of an unusual cause of upper gastrointestinal bleeding (U GIB). Endoscopic intervention has always been a preferred non-surgical method in treating UGIB including bleeding from Dieulafoy's lesion. Owing to recent advances in angiography, arterial embolization has become a popular alternative in non- variceal UGIB especially in ...
Prescott-Focht Julia A - - 2013
Advances in computed tomography (CT) scanners and electrocardiographic gating techniques have resulted in superior image quality of the ascending aorta and increased the use of CT angiography for evaluating the postoperative ascending aorta. Several abnormalities of the ascending aorta and aortic arch often require surgery, and various open techniques may ...
Yuan Jing - - 2013
Head and neck Magnetic Resonance (MR) Images are vulnerable to the arterial blood in-flow effect. To compensate for this effect and enhance accuracy and reproducibility, dynamic tracer concentration in veins was proposed and investigated for quantitative dynamic contrast-enhanced (DCE) MRI analysis in head and neck. 21 patients with head and ...
Yan Lei - - 2013
Background: The covered stent is one of the most promising tools for the treatment of intracranial fusiform aneurysms. We developed an in vivo model of fusiform aneurysms and evaluated the effectiveness of double telescoping Willis covered stents for their treatment. Materials and Methods: An external jugular vein graft was anastomosed ...
Rikhtegar Farhad - - 2013
Hemodynamic factors such as low wall shear stress have been shown to influence endothelial healing and atherogenesis in stent-free vessels. However, in stented vessels, a reliable quantitative analysis of such relations has not been possible due to the lack of a suitable method for the accurate acquisition of blood flow. ...
Sun Haogeng - - 2013
Background: A cerebral aneurysm with incomplete treatment may re-grow and cause new bleeding. This meta-analysis calculates the sensitivity and specificity of computed tomographic angiography (CTA) in the detection of the residual or recurrent cerebral aneurysms after clipping, in comparison with digital subtraction angiography (DSA). Materials and Methods: Between October 1997 ...
Yang Xin - - 2013
Carotid atherosclerosis is a major reason of stroke, a leading cause of death and disability. In this paper, a segmentation method based on Active Shape Model (ASM) is developed and evaluated to outline common carotid artery (CCA) for carotid atherosclerosis computer-aided evaluation and diagnosis. The proposed method is used to ...
Huded Vikram - - 2013
A 54-year-old man presented with recurrent episodes of transient ischemic attacks and acute stroke secondary to a floating thrombus in the right vertebral artery (VA) with narrowing of the right VA. He was initially treated medically with anticoagulation, antiplatelets and statins but developed multiple fresh infarcts. He was then referred ...
Zhang Ruifang - - 2013
Accurate measurement of aortic annulus diameter is crucial for choosing suitable prosthetic size for transcatheter aortic valve implantation (TAVI). Several imaging methods are available for the measurement, but significant variability between different modalities has been observed. The purpose of this study was to systematically compare the measurements of aortic annulus ...
Szpinda Michał - - 2013
Background The intraluminal size of the aorto-iliac segment is relevant in both the clinical and echographic settings. The aim of this study was to compile both the absolute and relative age-specific reference intervals for cross-sectional areas (CSAs) of the aorto-iliac segment. Material and Methods Using the methods of anatomical dissection, ...
Hu Yu-Ning - - 2013
The anomalous origin of the right pulmonary artery from the ascending aorta combined with coarctation of aorta is a rare congenital malformation. The method chosen for performing a prompt surgery to correct the multiple disease lesions is important. Here we report one-stage surgical strategy which involved a double-flap technique alongside ...
Chiastra Claudio - - 2013
One of the relevant phenomenon associated with in-stent restenosis in coronary arteries is an altered haemodynamics in the stented region. Computational fluid dynamics (CFD) offers the possibility to investigate the haemodynamics at a level of detail not always accessible within experimental techniques. CFD can quantify and correlate the local haemodynamics ...
Johnson Andrew Kelly - - 2013
Treating dissections and dissecting aneurysms requires maintenance of flow through the true lumen and exclusion of the false lumen from the circulation. A dissecting aneurysm of the vertebral artery presented with both a true and false lumen within the aneurysmal sac. Stenting of the true lumen followed by coil embolization ...
Staśkiewicz G - - 2013
Bowing of the interventricular septum (IVS) is a sign of severe pulmonary embolism(PE); however, it is affected by high interobserver variability. The aim of thestudy was to evaluate the application of volumetric reconstructions of the rightventricle for assessment of IVS position regarding its accuracy in identifying rightventricular dysfunction, as well ...
van Zyl Johann M - - 2013
Currently, a new generation of synthetic pulmonary surfactants is being developed that may eventually replace animal-derived surfactants used in the treatment of respiratory distress syndrome. Enlightened by this, we prepared a synthetic peptide-containing surfactant (Synsurf) consisting of phospholipids and poly-l-lysine electrostatically bonded to poly-l-glutamic acid. Our objective in this study ...
Soudah Eduardo - - 2013
The objective of this study is to find a correlation between the abdominal aortic aneurysm (AAA) geometric parameters, wall stress shear (WSS), abdominal flow patterns, intraluminal thrombus (ILT), and AAA arterial wall rupture using computational fluid dynamics (CFD). Real AAA 3D models were created by three-dimensional (3D) reconstruction of in ...
Aparci Mustafa - - 2013
Aortic dilation may critically precede progression to thoracic aortic aneurysm (TAA). Prolonged or repetitive isometric-type heavier strenuous activities resulting from the nature of some professions may be an important causative factor for TAA. The echocardiographic measurement data of middle-age subjects who were isometric-type daily strenuous activity trainers or ordinary activity ...
Tartar Ahmet - - 2013
Early detection of pulmonary nodules is extremely important for the diagnosis and treatment of lung cancer. In this study, a new classification approach for pulmonary nodules from CT imagery is presented by using hybrid features. Four different methods are introduced for the proposed system. The overall detection performance is evaluated ...
Pahlavan Pedram - - 2013
Artificial palpation is one of the most valuable achievements of artificial tactile sensing approach that can be used in various fields of medicine and more specifically in surgery. These techniques cause different surgical maneuvers to be done more precisely and noninvasively. In this study, considering the present problems and limitations ...
Lee C H - - 2013
Aortic intramural haematoma is similar to classic aortic dissection, which causes a life-threatening medical condition, and immediate diagnosis and treatment are crucial. The optimal therapy for intramural haematoma of the abdominal aorta remains controversial. Conservative medical management is usually the first choice of treatment for uncomplicated cases. Surgical intervention is ...
Li Xiaoyun - - 2013
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 ...
Niu Lili - - 2013
There is a strong research interest in identifying the surface roughness of the carotid arterial inner wall via texture analysis for early diagnosis of atherosclerosis. The purpose of this study is to assess the efficacy of texture analysis methods for identifying arterial roughness in the early stage of atherosclerosis. Ultrasound ...
Kramer Caroline K - - 2013
To investigate the association of coronary artery calcium score with all cause mortality and cardiovascular events in people with type 2 diabetes. Systematic review and meta-analysis of observational studies. Studies were identified from Embase, PubMed, and abstracts from the 2011 and 2012 annual meetings of the American Diabetes Association, European ...
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