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Results 51 - 100 of 2012
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Duran Cassidy C The Methodist DeBakey Heart & Vascular Center, Houston, TX. Electronic address: - - 2014
The success of remotely steerable catheters designed for cardiac ablation procedures in the peripheral vasculature (in the laboratory and in highly select live cases) has led to the development of a vascular robotic system designed specifically for use in the arterial and venous systems. Limited bench-top and animal testing has ...
Black Ashley A Department of Thoracic and Cardiovascular Surgery, University of Florida, Gainesville, - - 2014
Sternal reentry for ascending aorta pseudoaneurysm repair presents a formidable challenge because of the risk of aneurysm rupture and hemorrhage. We describe two cases of large pseudoaneurysms at high risk for rupture during sternal reentry in which the chest was safely entered by use of an anterior sternal retraction technique. ...
Kim Chang-Young CY Department of Thoracic and Cardiovascular Surgery, Inje University Ilsan Paik Hospital, Inje University College of Medicine, - - 2014
It is expected that the stent graft will become an alternative method for treating aortic diseases or reducing the extent of surgery; therefore, thoracic endovascular aortic repair has widened its indications. However, it can have rare but serious complications such as paraplegia and retrograde type A aortic dissection. Here, we ...
Zhao Lin-Bo LB Department of Radiology and Research Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Korea. ; Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, - - 2014
Problem with embolization of arteriovenous fistula (AVF) with liquid embolic agent is its over-penetration into the veins or regurgitation to the proximal feeder without reaching the shunt point. We present a technique that controls the flow of AVF during embolization. Two microcatheter technique consists of positioning one microcatheter close to ...
Raghavan Madhavan L ML Department of Biomedical Engineering, University of Iowa, Iowa City, IA, 52242, USA, - - 2014
The International Study of Unruptured Intracranial Aneurysms (ISUIA) is an epidemiologic international study of the natural history of unruptured intracranial aneurysms that enrolled 4,060 subjects. A conventional biplane cerebral angiogram available for central review was required for enrollment resulting in a large database. Data on aneurysms that ruptured during follow-up ...
Eburdery Harold H Plastic and Reconstructive Surgery Unit, CHU Toulouse Rangueil, 1 avenue Jean Poulhès, 31400, Toulouse, France, - - 2014
The main vessels in an injured leg can be spared with perforator-to-perforator anastomosis. However, supermicrosurgery is not a routine procedure for all plastic surgeons. Our objective was to establish if the diameter of the perforators of the leg could allow anastomosis with standard microsurgical procedures. Twenty lower legs harvested from ...
Govindaraju Kalimuthu K Department of Mechanical Engineering, University of Malaya, Kuala Lumpur, Malaysia. Electronic address: - - 2014
Functional assessment of a coronary artery stenosis severity is generally assessed by fractional flow reserve (FFR), which is calculated from pressure measurements across the stenosis. The purpose of this study is to investigate the effect of porous media of the stenosed arterial wall on this diagnostic parameter. To understand the ...
Gaha M M From the Department of Radiology (M.G., C.R., G.G., A.W., D.R., M.C., J.R.), Centre Hospitalier de l'Université de Montréal Notre-Dame Hospital, Montreal, Quebec, Canada; Service de Radiologie (L.E.), Hôpital Maison Blanche, CHU Reims, France; and Department of Mathematics and Statistics (M.C.), Université de Montréal, Montreal, Quebec, - - 2014
Angiographic results are commonly used as surrogate markers of the success of intra-arterial therapies for acute stroke. Inter- and intraobserver agreement in judging angiographic results remain poorly characterized. Our goal was to assess 2 commonly used revascularization scales. A portfolio of 148 pre- and post treatment images of 37 cases ...
Ichikawa Tsuyoshi T Department of Neurosurgery, Fukushima Red Cross - - 2014
Intra-arterial fluorescence angiography from a catheter inserted into the external carotid artery (ECA) via the superficial temporal artery (STA) allowed us to satisfactorily evaluate cerebral arterial and venous blood flow. We report this novel method that allowed for repeated angiography within minutes with a low risk of complications due to ...
Aminian Adel A Adel Aminian, Jacques Lalmand, Dariouch Dolatabadi, Division of Cardiology, Centre Hospitalier Universitaire de Charleroi, 6000 Charleroi, - - 2014
Several recent reports have described the occurrence of longitudinal stent deformation (LSD, defined as the distortion or shortening of a stent along the longitudinal axis), following its successful deployment. However, few reports have described LSD prior to any stent deployment. This previously unrecognized complication is the result of modifications to ...
Jayachandran Sivakumar S NHS and Private practice, Birmingham, UK. Electronic address: - - 2014
This article describes an alternative method to establish the inclination of the occlusal plane by using the hamular notch, incisive papilla plane. By using this plane, the fabrication of occlusal rims that conform to an ideal relationship may make chairside trimming of the rims more straightforward.
Ma Jiayao J Department of Engineering Science, University of Oxford, Oxford, - - 2014
Brain arterial aneurysms are localised dilatation in the wall of cerebral arteries that are common among adult population and associated with high incidence of morbidity and mortality. Using flow diverter stent alone to treat cerebral aneurysm is recognized as a safe and effective method. However, flow diverter stents currently available ...
Ho Brian B Department of Otolaryngology, Georgia Regents University, Augusta, - - 2014
Objective: To define transnasal endoscopic surgical landmarks for the parapharyngeal segment of the internal carotid artery (ppICA) using radiographic analysis and cadaveric dissection. Study Design: Cadaveric and radiographic study Methods: 179 CT angiography studies of the head and neck were analyzed using Osirix third-party software (Pixmeo, Switzerland). Dissection of a ...
Voros Szilard S Stony Brook University, Stony Brook, NY, - - 2014
We previously validated a gene expression score (GES) based on age, sex and peripheral blood cell expression levels of 23 genes measured by quantitative real-time PCR (qRT-PCR) for diagnosis of obstructive coronary artery disease (CAD) (≥50% luminal diameter stenosis). In this study we sought to determine the association between the ...
Erhardt Salome - - 2014
Objectives: Aneurysm volume is routinely approximated calculating cylindrical volumes. Exact aneurysm volume assessment is crucial for liquid polymer embolization. The aim of this study was to compare simple cylindrical volume approximations with direct multiplanar reconstruction (MPR) segmentational volumetry in a saccular/complex experimental rabbit bifurcation aneurysm model. Methods: In 12 female ...
Ulger Fatma Esra Bahadir FE Department of Radiology, Kahramanmaraş Necip Fazıl City Hospital, Kahramanmaraş, - - 2014
We present a case of common carotid artery agenesis which is an extremely rare congenital anomaly. Less than 35 cases have been reported. These anomalies are typically asymptomatic and usually discovered as an incidental finding. Color Doppler ultrasonography is an effective and sensitive method for detecting absence of common carotid ...
Bales G G Department of Anatomy, Western University of Health Sciences, Pomona, - - 2014
The azygos vein (AV) is typically described (illustrated) as ascending vertically on the right of thoracic vertebrae. Most thoracic vein studies have focused on tributary patterns, but some have noted more leftward AV courses. This study statistically documents variation in AV course independent of tributary patterns. A more statistical approach ...
Hwang M-H MH Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, - - 2014
Aortic pulse wave velocity (AoPWV) and augmentation index (AIx) are commonly used measures of large elastic artery stiffness and wave reflection, respectively. Recently, a new cuff-based SphygmoCor device (Xcel) has been developed to measure both AoPWV and AIx. We sought to examine the following: (1) the validity of Xcel compared ...
Fujimoto Motoaki - - 2014
Objectives: Biomechanical stress distribution correlates with the biological responses after stenting. Computational analyses have contributed to the optimization of stent geometry. In particular, structural analysis based on pre-operative angiography can be used to predict the stent-artery interaction before endovascular treatments. However, the simulated results need to be validated. In this ...
Liu Chuanzhen C Department of Cardiovascular Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, People's Republic of - - 2014
We sought to explore and create a reliable, convenient, and economic hyperkinetic pulmonary artery hypertension (PAH) model and confirm the exact time of establishing a reversible or irreversible model to serve as a platform for future studies. We used a common carotid artery and jugular vein shunt with an anastomosis ...
Iannaccone F F IbiTech-bioMMeda, Department of Electronics and Information Systems, iMinds Future Health Department, Ghent University, Belgium. Electronic address: - - 2014
Carotid artery stenting is emerging as an alternative technique to surgery for the treatment of symptomatic severe carotid stenosis. Clinical and experimental evidence demonstrates that both plaque morphology and biomechanical changes due to the device implantation can be possible causes of an unsuccessful treatment. In order to gain further insights ...
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 ...
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 ...
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 ...
Mizuno Takeshi - - 2013
We designed a novel method for constructing an autologous heart valve with a stent, called a stent-biovalve. In constructing completely autologous heart valves, named biovalves, which used in-body tissue architecture technology, tissues for leaflets were formed via ingrowths into narrow apertures in the preparation molds, frequently leading to delayed or ...
Friedrich Linda H - - 2013
Aortic valve degeneration and dysfunction is one of the leading causes for morbidity and mortality. The conventional heart-valve prostheses have significant limitations with either life-long anticoagulation therapeutic associated bleeding complications (mechanical valves) or limited durability (biological valves). Tissue engineered valve replacement recently showed encouraging results, but the unpredictable outcome of ...
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