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Results 201 - 250 of 2171
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Bapat Vinayak N VN Department of Cardiothoracic Surgery and Cardiology, Guy's and St. Thomas' Hospital, London, United Kingdom. Electronic address: - - 2014
The goal of this study was to provide a measurement of the true internal diameter (ID) of various surgical heart valves (SHV) to facilitate the valve-in-valve (VIV) procedure. During a VIV procedure, it is important to choose the right of the transcatheter heart valve (THV). Most users use the stent ...
Lauten Alexander A Department of Internal Medicine I (Cardiology, Angiology, Pneumology, Intensive Care Medicine), Jena University Hospital, Friedrich- Schiller University, Jena, - - 2014
Background: Caval Valve Implanatation (CAVI) has been suggested for transcatheter treatment of severe tricuspid regurgitation (TR). Combining the interventional technique with the promising surgical experience with decellularized valves we sought to evaluate the functional and structural outcome of decelluarized pericardial tissue valves (dTV) in the low-pressure venous circulation in a ...
Arokiaraj Mark C MC Professor, Cardiology, Pondicherry Institute of Medical Sciences, Kalathumettupathai street, Kalapet, Pondicherry, - - 2014
A novel large self-expanding endovascular stent was designed with strut thickness of 70 μm × 70 μm width. The method was developed and investigated to identify a novel simpler technique in aortic aneurysm therapy. Stage 1 analysis was performed after deploying it in a virtual aneurysm model of 6 cm wide × 6 cm ...
Duelsner André A Center for Cardiovascular Research (CCR), Universitaetsmedizin Berlin, Berlin, - - 2014
Unilateral common carotid artery occlusion (CCAO) is a standardized method to initiate collateral artery growth (arteriogenesis) in mouse brain. After CCAO is induced, blood circulation in the circle of Willis is changed and increases shear stress, which triggers increased arterial diameter and improvements in cerebrovascular reserve capacity. Functional improvement can ...
Imnadze Guram G Schuechtermann Clinic, Bad Rothenfelde, - - 2014
Catheter-directed intervention to treat atrial fibrillation (AF) is becoming widely accepted procedure in current clinical practice. For assessment of pulmonary vein (PV) anatomy, angiography of left atrium (LA) and/or PV is often performed. We present a new, simple angiographic method for PVs and LA opacification using SL1 sheath. Total of ...
Dziekiewicz Mirosław - - 2014
Abstract The study presented an approach to the morphometric image of atherosclerotic lesions of the final segment of the abdominal aorta, femoral and iliac arteries, considering possible endovascular intervention. The evaluation of these arteries is very important, because they are often used as a point of access for endovascular procedures ...
Di Somma Alberto A 0000-0002-3253-3448 Department of Neurosciences, Reproductive and Odontostomatological Sciences, Division of Neurosurgery, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131 Naples, Italy ; Laboratory of Surgical Neuroanatomy (LSNA), Faculty of Medicine, Universitat de Barcelona, Villarroel 170, 08036 Barcelona, - - 2014
Introduction. The purpose of the present contribution is to perform a detailed anatomic and virtual reality three-dimensional stereoscopic study in order to test the effectiveness of the extended endoscopic endonasal approaches for selected anterior and posterior circulation aneurysms. Methods. The study was divided in two main steps: (1) simulation step, ...
Bell Marshall T MT Department of Surgery, Division of Cardiothoracic Surgery, University of Colorado; - - 2014
Background Lower extremity paralysis continues to complicate aortic interventions. The lack of understanding of the underlying pathology has hindered advancements to decrease the occurrence this injury. The current model demonstrates reproducible lower extremity paralysis following thoracic aortic occlusion. Methods Adult male C57BL6 mice were anesthetized with isoflurane. Through a cervicosternal incision the ...
Madycki Grzegorz - - 2014
The duplex Doppler examination of carotid and vertebral arteries is the primary diagnostic method in detecting disorders leading to the brain blood supply disturbances. In many cases, in patients with carotid artery stenosis, the Doppler ultrasound plays a major role in the process of qualification to the reconstructive procedures. Regardless ...
Rizi Fereshteh Yousefi FY School of Electrical and Computer Engineering, Control and Intelligent Processing Center of Excellence, College of Engineering, University of Tehran, Tehran, - - 2014
Quantification of arterial elasticity and its dependency to age is considered in this paper. We use radiofrequency (RF) signals from carotid artery ultasonography to evaluate this dependency. Blood pressure, blood flow, and tethering to surrounding tissue are the main causes of the motion of the carotid wall. Tracking carotid artery ...
Sugashi Takuma T Department of Mechanical Engineering and Intelligent System, Graduate School of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan, - - 2014
The present study was aimed to characterize 3-dimensional (3D) morphology of the cortical microvasculature (e.g., penetrating artery and emerging vein), using two-photon microscopy and automated analysis for their cross-sectional diameters and branching positions in the mouse cortex. We observed that both artery and vein had variable cross-sectional diameters across cortical ...
Nakagomi Tadayoshi T Department of Neurosurgery, Teikyo University School of Medicine, 2-11-1 Kaga, Itabashi City, Tokyo, 173-8605, Japan, - - 2014
In general, vertebro-basilar aneurysms are good indications for endovascular treatment. However, basilar artery (BA) bifurcation aneurysms, BA-superior cerebellar artery (SCA) aneurysms, and sometimes mid-basilar aneurysms are also good indications for clipping. In this paper, conditions for safe and secure clipping for distal basilar aneurysms are discussed.There are several tips for ...
Khalid Ahsan Syed AS Saba University School of Medicine, Devens, MA 01434, - - 2014
Profunda femoris artery aneurysms and pseudoaneurysms are a rare cause of peripheral arterial aneurysms but their risk of rupture is quite high. We have presented a case of a left lower leg pseudoaneurysm. We have shown that endovascular repair with angioplasty and stenting is a suitable treatment method for such ...
Mukai Nobuhiko N Gradute School of Engineering, Tokyo City Univeristy, - - 2014
We have performed a dynamic simulation of the aortic valve by considering heart's pulsation. In the simulation, there are two different types of materials: elastic body for the aortic wall and the aortic valve, and fluid for blood. In order to calculate the collision detection between two different types of ...
Isfort P P Department of Diagnostic and Interventional Radiology, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, - - 2014
Purpose. To investigate the safety and feasibility of the use of a vascular closure device (VCD) after endovascular procedures in swine. Material and Methods. In a study on endovascular therapy, VCD (StarClose, Abbott Vascular, Il, USA) was used in 20 female swines to achieve immediate hemostasis after percutaneous right femoral ...
Lee Ji Won JW Department of Radiology, Pusan National University Hospital, Pusan National University School of Medicine and Medical Research Institute, Busan, Republic of - - 2014
Aortic unfolding occurs with aging and reflects proximal aortic dilation, aortic arch widening, and decreased curvature. This study 1) evaluated the relationship between aortic unfolding measured using non-contrast cardiac-gated computed tomography (CT) and age, 2) assessed factors influencing aortic unfolding, and 3) determined the association of this measurement with coronary ...
Qi Xiaolong X Institute of Digestive Disease, Tongji Hospital, Tongji University School of Medicine, Shanghai, - - 2014
Trans-stenotic pressure gradient (TSPG) and fractional flow reserve (FFR) are well-validated hemodynamic indices to assess the ischemic severity of arterial stenoses. However, they have significant restrictions in practice due to invasiveness and high cost. Recently, a noninvasive assessment of FFR from computed tomography (CT) angiography has been well validated in ...
Rudziński Piotr N PN Department of Coronary and Structural Heart Diseases, Institute Cardiology, Warsaw, - - 2014
The following case report describes a complication of Swan-Ganz catheterization and its endovascular treatment with a single coil. Application of this particular catheter in the pulmonary artery during cardiac surgery may lead to mechanical perforation and creation of an extravascular sac, which is called a pseudoaneurysm. There are different methods ...
Khatami Alireza A Department of Radiology, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, - - 2014
In malrotation the position of third portion of duodenum (D3) is always intramesenteric. Demonstration of normal retromesenteric-retroperitoneal position of D3 on ultrasound (US) can rule out malrotation. The aim of this study was to evaluate the feasibility of US in demonstrating the retroperitoneal D3. Abdominal US study was done for ...
Chun Ho Jong HJ Department of Radiology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of - - 2014
Syndiotactic polyvinyl alcohol (PVA) had been developed to overcome the drawbacks of atactic PVA spheres that deform easily, which can lead to non-target embolization. This study was performed to evaluate the in vivo stability of spherical shape of the syndiotactic PVA spheres. Selective arteriography and transarterial embolization (TAE) were performed ...
Weir-McCall Jonathan R JR Division of Cardiovascular and Diabetes Medicine, Medical Research Institute, University of Dundee, Dundee, United Kingdom; NHS Tayside Clinical Radiology, Ninewells Hospital, Dundee, United - - 2014
Common carotid intima media thickness (CIMT) and ankle brachial pressure index (ABPI) are used as surrogate marker of atherosclerosis, and have been shown to correlate with arterial stiffness, however their correlation with global atherosclerotic burden has not been previously assessed. We compare CIMT and ABPI with atheroma burden as measured ...
Maridati Paolo P Department of Implant Dentistry, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano, Università degli Studi di Milano, Milan, - - 2014
The sinus lift technique, introduced in 1976 by Tatum and subsequently described by Boyne in 1980, is nowadays considered a safe and reliable procedure for the rehabilitation of the atrophic upper posterior maxilla. The alveolar antral artery (AAA) is anastomoses between the posterior superior alveolar artery (PSAA) and the infraorbital ...
Hamid Muhammed Hamed H School of Technology and Health (STH), Royal Institute of Technology (KTH), Alfred Nobels Alle 10, SE-141 52 Huddinge, - - 2014
A novel method for characterizing and visualizing the progression of waves along the walls of the carotid artery is presented. The new approach is noninvasive and able to simultaneously capture the spatial and the temporal propagation of wavy patterns along the walls of the carotid artery in a completely automated ...
Avanzini Andrea A Department of Industrial and Mechanical Engineering, University of Brescia, Via Branze 38, 25123 Brescia, - - 2014
The biomechanical properties of ascending aortic aneurysms were investigated only in the last decade in a limited number of studies. Indeed, in recent years, there has been a growing interest in this field in order to identify new predictive parameters of risk of dissection, which may have clinical relevance. The ...
Kukliński Adam A Department of Surgery, Radom Specialist Hospital, Radom, - - 2014
Splenic artery aneurysm is the third most common abdominal aneurysm. Most often it is due to pancreatitis. There were only 19 cases of aneurysms larger than 5 cm in diameter described in the literature. Management of splenic artery aneurysms depends on the size and symptoms. Invasive treatment modalities involve open ...
Akl Tony J TJ Department of Biomedical Engineering, Texas A&M University, College Station, Texas, United States of - - 2014
Liver transplants have their highest technical failure rate in the first two weeks following surgery. Currently, there are limited devices for continuous, real-time monitoring of the graft. In this work, a three wavelengths system is presented that combines near-infrared spectroscopy and photoplethysmography with a processing method that can uniquely measure ...
Umeoka Katsuya K Chiba-Hokusou Hospital, Nippon Medical School, Department of Neurosurgery, 1715 Kamagari, Inzai City, Chiba, - - 2014
In surgeries involving clamping, opening and repairing the carotid artery such as carotid endarterectomy (CEA) and proximal anastomosis at radial artery (RA) grafting, back-bleeding, often due to insufficient occlusion of the ascending pharyngeal artery (APA), must be avoided. In 96% of cases the APA originates at the dorsal side of ...
Ivanov Dmitry D Mathematical Modeling Subdepartment, Educational-Research Institute of Nanostructures and Biosystems, Saratov State University, Saratov, Russian - - 2014
This paper includes results of the first stage of research aimed at the development of recommendations for physicians in order to help them to choose a particular type of cerebral arteries aneurysms treatment. Recent studies show that the majority of aneurysms develop as a result of hemodynamic and degenerative lesions ...
Borghi Alessandro A Institute of Child Health, University College London, London, - - 2014
The present article presents a method for assessing the radial stiffness of nitinol stents. An idealized stent model was created, and its radial stiffness was calculated by means of finite element modeling. The calculations were validated against experimental measurements. The variation of radial stiffness with geometrical dimensions was calculated, and ...
Santiago-Dieppa David R DR Division of Neurosurgery, University of California, San Diego, 200 West Arbor Drive, San Diego, CA 92103, - - 2014
Middle cerebral artery (MCA) aneurysms are common entities, and those of the bifurcation are the most frequently encountered sublocation of MCA aneurysm. MCA bifurcation (MBIF) aneurysms commonly present with subarachnoid hemorrhage (SAH), are devastating, and are often lethal. At the present time, the treatment of ruptured MBIF aneurysms entails either ...
Ekici Berkay B 0000-0001-6135-2972 Department of Cardiology, Faculty of Medicine, Ufuk University, Mevlana Bulvarı (Konya Yolu) No. 86-88, Balgat, 06520 Ankara, - - 2014
Perforation of coronary arteries is a relatively rare yet life-threatening complication of percutaneus coronary interventions and is encountered in approximately 0.5% of these procedures. According to the type of coronary perforation, various methods of correction are employed, ranging from conservative approach to emergency cardiac surgery. Coronary stent-grafts are composed of ...
Louw Louise L Department of Otorhinolaryngology, University of the Free State, Bloemfontein, South - - 2014
Identification of the origin of the central retinal artery (CRA) is imperative in tailoring angiographic studies to resolve a given clinical problem. A case with dual ophthalmic arteries (OAs), characterized by different origins and distinct branching patterns, is documented for training purposes. Pre-clinical diagnosis of a 9-year-old child who presented ...
Ferrero Guadagnoli Adolfo A Servicio de Hemodinamia, Hospital Privado de Córdoba, Córdoba, Argentina. E-mail: - - 2014
Isolation of the pulmonary veins by applying radiofrequency is an effective treatment for atrial fibrillation. One of the potential complications with higher clinical compromise utilizing this invasive technique is the occurrence of stenosis of one or more pulmonary veins. This complication can be treated by angioplasty with or without stent ...
Vetter Thomas R TR Department of Anesthesiology, School of Medicine, University of Alabama at Birmingham, 619 19th Street South, JT804, Birmingham, AL 35249-6810, - - 2014
With the advent of percutaneous coronary intervention, specifically the bare metal stent and subsequently, the drug-eluting stent, the scope of interventional cardiology has greatly increased. Aspirin, in combination with a thienopyridine is the present-day cornerstone of oral antiplatelet therapy after coronary artery stent placement. Continuing this chronic antiplatelet therapy, to ...
Zhang Liyong L Department of Neurosurgery, Liaocheng People's Hospital Liaocheng 252000, Shandong, - - 2014
Along with the recent development of intraluminal interventional techniques and correlated imaging methods, one-stop hybrid operation has become a new focus in clinical settings. The aim of this study is to discuss the clinical significance of the one-stop hybrid endarterectomy surgery in the treatment of complex ischemic cerebrovascular diseases. In ...
Manade Vivek Vilas VV Department of Medicine, Padmashree Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pune, Maharashtra, - - 2014
A 67-year-old man with type 2 diabetes mellitus and hypertension since 7 years presented with a 3-month history of low-grade fever and malaise. Cardiac auscultation revealed the presence of an ejection systolic murmur in the primary aortic area. Most of the investigations for febrile illness were reported normal. His two-dimensional (2D) ...
Ramnath Natasja W M NW Department of Genetics, Cancer Genomics Centre, Erasmus MC, Rotterdam, The Netherlands; Department of Vascular Surgery, Erasmus MC, Rotterdam, The - - 2014
In this study we set out to investigate the clinically observed relationship between chronic obstructive pulmonary disease (COPD) and aortic aneurysms. We tested the hypothesis that an inherited deficiency of connective tissue might play a role in the combined development of pulmonary emphysema and vascular disease. We first determined the ...
Skoda Ondřej O Department of neurology, 3rd Medical Faculty, Charles University, Prague, Czech Republic; Department of Neurology, General hospital, Vrchlického 59, 58633 Jihlava, Czech Republic. Electronic address: - - 2013
A reliable and safe diagnostic procedure for vertebral artery (VA) stenosis is needed, but none is generally accepted yet. In our study, we evaluated symptomatic VA stenoses using color Doppler sonography (CDS). CT angiography (CTA) has been employed as a non-invasive reference method. Next, we tested the accuracy for medium ...
Shi Chaoyang C Department of Micro-Nano Systems Engineering, Nagoya University, Japan; Department of Computing, Imperial College London, - - 2013
There are several complications associated with Stent-assisted Coil Embolization (SACE) in cerebral aneurysm treatments, due to damaging operations by surgeons and undesirable mechanical properties of stents. Therefore, it is necessary to develop an in vitro simulator that provides both training and research for evaluating the mechanical properties of stents. A ...
Itoda Yoshifumi Y Department of Cardiac Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan, - - 2013
The use of minimally invasive and robotic operations has been increasing for coronary artery bypass surgery; however, no suturing devices have been universally adopted for use in these procedures. We developed a new suturing device that enables omission of manual ligation after a running suture. Twenty-two rabbits were used in ...
Chèvre Raphael R Epidemiology, Atherothrombosis and Imaging, Centro Nacional de Investigaciones - - 2013
The inflammatory processes that initiate and propagate atherosclerosis remain poorly understood, largely because defining the intravascular behavior of immune cells has been technically challenging. Respiratory and pulsatile movements have hampered in vivo visualization of leukocyte accumulation in athero-prone arteries at resolutions achieved in other tissues. To establish and to validate ...
Prat Jordi J Department of Pediatric Surgery, Hospital Sant Joan de Déu-Hospital Clínic, Universitat de Barcelona, Barcelona, - - 2013
Background:In animal models of congenital diaphragmatic hernia (CDH), tracheal occlusion (TO) has induced maturation of both airway spaces and vascular structures. Airway and vascular response to TO are assumed to occur in parallel. This study aims to describe and measure the relationship between airway and vascular maturation induced by TO.Methods:A ...
van Horssen Pepijn P Academic Medical Center, University of - - 2013
Blood flow distribution within the myocardium and the location and extent of areas at risk in case of coronary artery disease are dependent on the distribution and morphology of intramural vascular crowns. Knowledge of the intramural vasculature is essential in novel multi-scale and multi- physics modeling of the heart. For ...
Pashaj S S Ultrasound Department, Maternity Hospital "Koco Gliozheni", - - 2013
Purpose: To demonstrate the different normal variants of the fetal pericallosal artery (PCA) with the different branching forms of callosomarginal artery (CMA) by three-dimensional glass body-rendering. Materials and Methods: With the use of the glass body mode (grey scale ultrasound and color or power Doppler), 3-D ultrasound permits precise imaging ...
Mizutani Eiki E Department of Thoracic Surgery, Tokyo Teishin Hospital, 2-14-23 Fujimi, Chiyoda-ku, Tokyo, 102-8798, Japan, - - 2013
Endo GIA(™) curved tips with Tri-Stapler(™) is more useful for the approach for pulmonary vessels than conventional straight staplers. Unless adequate space is maintained below the vessels, there is a risk of causing damage to the back of vessels with the curved tip without optional introducers. The recommended method involves ...
Di Giammarco Gabriele G Division of Cardiac Surgery, Department of Neuroscience and Imaging, University 'G.D'Annunzio' Chieti, Chieti, - - 2013
Transit-time flow measurement (TTFM) allows intraoperative functional assessment of grafts in coronary artery bypass grafting (CABG). The major limitation of this technique is a low positive predictive value (PPV) that could lead to unnecessary graft revisions. A combined approach with high-resolution epicardial ultrasonography (HR-ECUS) and TTFM was evaluated for the ...
Wilhelm B Jakub BJ Easton Hospital, Drexel University, College of Medicine. Electronic address: - - 2013
Isolated internal iliac artery aneurysms (IIIAA) are a very rare form of aneurysm. The incidence increases with age and the prevalence is higher in men. The clinical presentation can vary and standard treatment protocols are not established. The first case of an IIIAA was described over 100 years ago. The ...
Lauric Alexandra A Cerebrovascular and Endovascular Division, Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, - - 2013
Aneurysm formation in locations not involving vascular bifurcations has not been thoroughly analyzed. This study evaluated the relationship between the degree of vessel curvature and the presence of intracranial sidewall aneurysms of the internal carotid artery (ICA). Catheter-based 3D-rotational angiographic volumes and demographic data were available for 130 ICAs. Mean ...
Lee Whal W 0000-0003-1285-5033 Department of Radiology, Seoul National University College of Medicine, Seoul, - - 2014
Carotid Doppler ultrasonography is a popular tool for evaluating atherosclerosis of the carotid artery. Its two-dimensional gray scale can be used for measuring the intima-media thickness, which is very good biomarker for atherosclerosis and can aid in plaque characterization. The plaque morphology is related to the risk of stroke. The ...
Kontopodis N - - 2013
Aim: In order to evaluate the elastic behavior of the abdominal aortic aneurysm (AAA), the distribution of aortic deformation during the cardiac cycle is measured. Moreover, the distensibility of the AAA composite structure consisting of the AAA wall and the intraluminal thrombus (ILT), as well as that of the adjacent ...
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