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Results 401 - 450 of 2163
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Morales-Roselló José - - 2013
Abstract Objective. To determine the existence of Doppler changes in the fetal vertebral, middle cerebral and umbilical arteries prior to term labor. Methods. Five hundred and twenty eight Doppler examinations of the vertebral (VA), middle cerebral (MCA) and umbilical (UA) arteries resistance indices (RI) were performed between 37 and 41 ...
Ghosh Justin - - 2013
Pulmonary vein isolation by balloon cryoablation is an accepted method of treating atrial fibrillation. Little data exist regarding factors affecting late electrical reconnection of pulmonary veins following cryoballoon ablation. Fifty one consecutive patients undergoing repeat catheter ablation for recurrent atrial fibrillation following initial balloon cryoablation underwent retrospective assessment of initial ...
Hiraishi Tetsuya - - 2013
The affected artery in glossopharyngeal neuralgia (GPN) is most often the posterior inferior cerebellar artery (PICA) from the caudal side or the anterior inferior cerebellar artery (AICA) from the rostral side. This technical report describes two representative cases of GPN, one with PICA as the affected artery and the other ...
Kono Kenichi - - 2013
BACKGROUND:: and Importance: In endovascular treatment for cerebral aneurysms using balloons, stents, or flow-diverters, a microguidewire or microcatheter needs to be navigated distally across the neck of the aneurysm. However, this is sometimes difficult when there is a wide-neck or large aneurysm with a tortuous or atherosclerotic parent vessel. In ...
Alfano Jaclyn M - - 2013
BACKGROUND:: Intracranial aneurysms (IAs) occur more frequently at certain bifurcations than at others. Hemodynamic stress, which promotes aneurysm formation in animal models, also differs among bifurcations depending on flow and vessel geometry. OBJECTIVE:: To determine if locations that are more likely to develop IAs experience different hemodynamic stresses that might ...
Kanber Baris - - 2013
BACKGROUND: Several studies have found that the ultrasound greyscale median (GSM) of carotid artery plaques may be useful for predicting the risk of cerebrovascular events. However, measurements of GSM are typically performed on still ultrasound images ignoring any variations that may be observed on a frame-by-frame basis. The aim of ...
Inami Takumi T Division of Cardiology, Second Department of Internal Medicine, Kyorin University School of Medicine, Tokyo, - - 2013
This study sought to identify useful predictors for hemodynamic improvement and risk of reperfusion pulmonary edema (RPE), a major complication of this procedure. Percutaneous transluminal pulmonary angioplasty (PTPA) has been reported to be effective for the treatment of chronic thromboembolic pulmonary hypertension (CTEPH). PTPA has not been widespread because RPE ...
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 ...
Lauric Alexandra - - 2013
Aneurysm-to-vessel size ratio (SR) predicts rupture status based on the premise that large aneurysms on small vessels are more likely to rupture compared to small aneurysms on larger vessels. While simpler for sidewall-type (function of proximal vessel [PV] only), SR methodology for bifurcation aneurysms requires the overhead of daughter vessels ...
Minko P - - 2013
PURPOSE: To investigate the efficacy and safety of mechanical thrombectomy for iliac vein thrombosis using Rotarex and Aspirex catheters in a pig model. MATERIALS AND METHODS: Iliac vein thrombosis was induced in six pigs by means of an occlusion-balloon catheter and thrombin injection. The presence of thrombi was verified by ...
Chiu Albert Ho Yuen - - 2013
BACKGROUND: Dural arteriovenous fistulas are vascular malformations with variable clinical symptoms that range in severity from completely asymptomatic to seizures, dementia, loss of vision and intracranial hemorrhage. Historically, surgical obliteration was the treatment of choice but, more recently, endovascular embolization has become the first-line treatment. The liquid embolic agent Onyx ...
Foin Nicolas N International Centre for Circulatory Health, NHLI, Imperial College London, London, UK. - - 2013
Current in vivo models of arterial lesions often lead to unpredictable results in terms of lesion anatomy and hemodynamical significance. This study aimed to evaluate the impact of coronary stenosis using a novel in vivo adjustable stenosis model capable of mimicking advanced human coronary lesions. We developed a series of ...
Wong Eric C - - 2013
Since it was introduced over 20 years ago, arterial spin labeling and related methods have steadily evolved over the years, and the field has seen not only improvements in technical specifications, such as signal-to-noise ratio and accuracy, but also the introduction of methods that allow for the collection of new ...
Lin Jing - - 2013
Stent-grafts externally fitted with a Z-shaped stents were compared to devices fitted with ringed stents in an in vitro oscillating fatigue machine at 200 cycles per minute and a pressure of 360 mmHg for scheduled durations of up to 1 week. The devices fitted with Z-stents showed a considerably lower endurance limit ...
Ludwig Wesley - - 2013
To determine if the vas deferens during robot-assisted radical prostatectomy can be used to medially retract the iliac vessels and obturator nerve to achieve a dissection plane in the triangle of Marcille free of these structures while performing an extended pelvic lymph node dissection (PLND). In a single patient, an ...
Pershad Ashish - - 2013
There are limitations of using 2D imaging to accurately size the aortic annulus. This article highlights the limitations of 2D technology and proposes a new 3D TEE method for sizing of the aortic annulus. Three-dimensional echocardiography with the method described can identify the "true" aortic annulus with precision. A 3D ...
Choi Jin-Ho - - 2013
There are various methods for approaching the aortic arch, such as median sternotomy or lateral thoracotomy. However, accessing the site of distal anastomosis is problematic when the distal arch is extensively involved. We report a case of extended aortic arch replacement and coronary artery bypass through the L-incision approach.
Bordinhão Alessandro - - 2013
This work aims to study comparatively the free flow and the Doppler flowmetry of the internal thoracic artery in anesthetized dogs, with and without continuous intravenous administration of norepinephrine. The sample was made up of ten mongrel dogs, which dissected the left and right internal thoracic arteries and evaluated your ...
George Jinzy Mariam JM Senior Resident, Department of Medicine, Kasturba Medical College Mangalore , Manipal University, India - - 2013
The Carotid Intima-Media Thickness (CIMT) is a simple and an inexpensive tool which can be used to assess the cumulative effect of atherosclerotic risk factors and it is also an independent predictor of the future cardiovascular risk. Nevertheless, criticism has been raised throughout the scientific community, based on the observations ...
Waffenschmidt Tobias - - 2013
Various biological tissues are designed to optimally support external loads for complex geometries and mechanobiological structures. This results in complex microstructures of such materials. The design of, for instance, (healthy) arteries, which are in the focus of this work, is characterised by a residually stressed fibre-reinforced multi-layered composite with highly ...
Miyachi Shigeru - - 2013
BACKGROUND: Stent-assisted coil embolization is useful for wide-necked, large and giant aneurysms, and is effective for avoiding coil herniation. However, the mobility of the microcatheter is often restricted, resulting in deviated or unbalanced coiling. In order to prevent this insufficient coiling, the authors devised a method for microcatheterization, the 'one ...
Chen Shu-Qin - - 2013
Uterine arteriovenous malformation (AVM) is an uncommon, potentially life-threatening condition, and the primary therapeutic method is embolization. We describe a case of a 36-year-old woman with acquired uterine AVM accompanied by abnormal vaginal bleeding. The diagnosis was established by Doppler flow ultrasonography combined with magnetic resonance arteriography. Because this uterine ...
Wang Yubo - - 2013
Purpose. To find a safe, effective, and simple method to create a rabbit aneurysm model. Methods. Twelve adult New Zealand rabbits were divided into two groups: experimental (n = 9) and control (n = 3). The origin of the right external carotid artery was occluded with a temporary aneurysm clip, ...
Elattal Ramy - - 2013
PURPOSE: Tracheal occlusion (TO) induces lung growth in congenital diaphragmatic hernia (CDH) but is also associated with drawbacks. We devised a temporary gel plug that induced lung growth when placed in the fetal trachea. This study evaluates the effects of temporary versus permanent TO on histologic radial alveolar count (RAC) ...
Yuan Li-Jun - - 2013
BACKGROUND: The adaption of elastic arteries to transient increase in hemodynamic load in normal pregnancy (NP) remains controversial. The purpose of this study was to investigate the NP carotid remodeling and regional arterial stiffness before and after parturition. METHODS: Fifty-one NP women and 30 age-matched non-pregnant women were included. All ...
Griessenauer Christoph J - - 2013
Introduction. Few reports have mentioned the artery of Davidoff and Schechter (ADS). Therefore, this variant tentorial branch of the posterior cerebral artery (PCA) was studied. Materials and methods. Twenty adult latex-injected cadaveric heads (40 sides) underwent microdissection with specific attention given to the presence of the ADS. When identified, measurements ...
Nishida Tatsuya - - 2013
Air embolism is a rare complication of computed tomography (CT)-guided preoperative marking of peripheral pulmonary nodules. Here, we describe a new CT-guided marking method, which allows the quick intraoperative identification of peripheral pulmonary nodules and avoids this complication. This method does not require piercing of the pulmonary parenchyma and uses ...
Legrand Laurence - - 2013
BACKGROUND AND PURPOSE: To propose a T2*-MR adaptation of the computed tomography angiography-clot burden score (CBS), and assess its value as predictor of 24-hour recanalization and clinical outcome in anterior circulation stroke treated by intravenous thrombolysis ≤4.5 hours from onset. METHODS: Two independent observers retrospectively analyzed pretreatment T2* images for ...
Ohya Hidefumi - - 2013
Recently, subintimal angioplasty has been introduced as a bailout strategy to improve the success rate of PCI for vessels with CTO. However, the long-term outcome of subintimal angioplasty has not been determined, and a limitation of subintimal angioplasty is the uncertainty in making the re-entry point. We report two cases, ...
Zhang Tuo - - 2013
Objectives: To evaluate the effectiveness of drug-eluting balloons (DEBs) in the treatment of de novo coronary artery disease by performing a meta-analysis of randomized controlled trials (RCTs). Backgrounds: Current evidence regarding the success of DEBs is insufficient to formulate formal recommendations. Methods: 7 RCTs were ultimately included. The primary angiographic ...
Burr Jamie F - - 2013
Recent reports that habitual marathon runners demonstrate higher levels of stiffness and cardiovascular risk factors have been of great interest to the medical and scientific community. Ultra-marathon running, that is any distance >42.2km, is increasing in popularity; however, little is known regarding the physiological effects of the sport's unique training ...
Namba K K Department of Endovascular Surgery, Jichi Medical University; Tochigi, Japan. - - 2013
The aim of this study was to develop a technically simple swine aneurysm-training model by inserting a silicone aneurysm circuit in the cervical vessels. A silicone aneurysm circuit was created by designing multiple aneurysms in size and configuration on a silicone vessel. Five swine underwent surgical implantation of this circuit ...
Alameddine Abdallah K - - 2013
This report describes an effective cerebral perfusion method using an additional 4th side limb graft sewn to a trifurcated graft in patients undergoing redo aortic root reconstruction combined with total aortic arch replacement. This method is useful in cases where the origin of the innominate artery is unsuitable for clamping ...
Martin David - - 2013
Today, the majority of coronary stents are balloon-expandable and are deployed using a balloon-tipped catheter. To improve deliverability, the membrane of the angioplasty balloon is typically folded about the catheter in a pleated configuration. As such, the deployment of the angioplasty balloon is governed by the material properties of the ...
Chiastra Claudio C Chemistry, Materials and Chemical Engineering Department, Politecnico di Milano, Milan, Italy. - - 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 ...
Ahn Sung Soo - - 2013
Purpose:To examine the associations between intracranial artery calcifications (IACs) and coronary artery calcifications (CACs) in patients with ischemic stroke and to assess the predictive value of IAC for asymptomatic coronary artery disease (CAD).Materials and Methods:This retrospective study, approved by an institutional review board that waived the need for informed consent, ...
Entezari Pegah - - 2013
OBJECTIVE: To evaluates a semi-automated method for Thoracic Aortic Aneurysm (TAA) measurement using ECG-gated Dual Source CT Angiogram (DSCTA). METHODS: This retrospective HIPAA compliant study was approved by our IRB. Transaxial maximum diameters of outer wall to outer wall were studied in fifty patients at seven anatomic locations of the ...
Merkx Maarten A G - - 2013
<i>Purpose:</i> The aim of this work was to establish the relationship between traditional blood vessel mapping for vascular access (VA) creation by B-mode ultrasound (US) and novel non contrast-enhanced magnetic resonance angiography 
(NCE-MRA), and to study the potential influence of the diameter assessment technique on the choice of hemodialysis vascular ...
Bannas Peter - - 2013
OBJECTIVE: To evaluate the association between aortic arch calcifications (AAC) on chest radiography and coronary artery calcium (CAC) score determined by CT. METHODS: A total of 128 patients (75 men; 69.3 ± 14.7 years) who underwent chest radiography and CAC scoring at CT were included in this retrospective analysis. The extent of AAC ...
Shuhaiber Jeffrey H JH School of Aerospace Systems, University of Cincinnati, Cincinnati, OH, USA. - - 2013
The theoretical differences in energy losses as well as coronary flow with different band sizes for branch pulmonary arteries (PA) in hypoplastic left heart syndrome (HLHS) remain unknown. Our objective was to develop a computational fluid dynamic model (CFD) to determine the energy losses and pulmonary-to-systemic flow rates. This study ...
Li Tiejun - - 2013
Abstract Objective Individual studies examining the effects of prostacyclin and its analogues on pulmonary artery hypertension (PAH) have reported controversial results. The study aimed to evaluate the efficacy of these agents for PAH by a meta-analysis based on randomized controlled trials (RCTs). Research design and methods We systematically searched Pubmed, ...
Rodriguez Jennifer N - - 2013
Cerebral aneurysms treated by traditional endovascular methods using platinum coils have a tendency to be unstable, either due to chronic inflammation, compaction of coils, or growth of the aneurysm. We propose to use alternate filling methods for the treatment of intracranial aneurysms using polyurethane based shape memory polymer (SMP) foams. ...
Zu Qing-Quan - - 2013
Stroke is one of the leading causes of death worldwide and the main reason for long-term disability. An appropriate animal model of stroke is urgently required for understanding the exact pathophysiological mechanism of stroke and testing any new therapeutic regimen. Our work aimed to establish a canine stroke model occluding ...
Cansu Aysegul - - 2013
PURPOSE: The purpose of the study was to compare the diagnostic value of color Doppler ultrasonography (CDUS) and multidetector computed tomography (MDCT) angiography against that of digital subtraction angiography (DSA) or surgery in the evaluation of failing hemodialysis arteriovenous fistulas (AVFs). MATERIALS AND METHODS: CDUS and MDCT angiography were performed ...
Besachio David A - - 2013
INTRODUCTION: Our objective is to determine the utility of noncontrast Hounsfield unit values, Hounsfield unit values corrected for the patient's hematocrit, and venoarterial Hounsfield unit difference measurements in the identification of intracranial venous thrombosis on noncontrast head computed tomography. METHODS: We retrospectively reviewed noncontrast head computed tomography exams performed in ...
Chapot René - - 2013
INTRODUCTION: The arteries of bifurcation aneurysms are sometimes so angulated or tortuous that an exchange maneuver is necessary to catheterize them with a balloon or stent delivery catheter. Because of the risk of distal wire perforation associated with exchange maneuvers, we sought to find an alternative technique. METHODS: Our experience ...
Tang Hui - - 2013
Purpose: The degree of stenosis is an important biomarker in assessing the severity of cardiovascular disease. The purpose of our work is to develop and evaluate a semiautomatic method for carotid lumen segmentation and subsequent carotid artery stenosis quantification in CTA images.Methods: The authors present a semiautomatic stenosis detection and ...
Lee Youn Joo - - 2013
The objective of this study was to assess the lumen visibility of carotid artery stents using multi-detector-row computed tomography (MDCT) angiography; compare medium-smooth, medium-sharp, and sharp kernels; and correlate these results to those of digital subtraction angiography (DSA). We retrospectively evaluated 52 stents from 51 patients who underwent 16- and ...
Thakar Tejal - - 2013
Purpose : To present a preliminary experience using a multilayer flow-modulating stent for trans/infragenicular popliteal endovascular aneurysm repair. Methods : Five men (mean age 76 years, range 62-86) with 6 popliteal artery aneurysms (PAAs) measuring 22 to 39 mm in diameter (mean 30) underwent endovascular repair using the Cardiatis Multilayer ...
Wang Jian-Bo - - 2013
Aim: To evaluate the use of a biodegradable nanofiber-covered stent (BDNCS) in the treatment of a canine carotid artery aneurysm. Materials and Methods: Seventeen beagle dogs, each with one lateral saccular aneurysm created using a venous pouch, were selected to test the BDNCS. The BDNCS consists of three parts: A ...
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