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Results 401 - 450 of 2179
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Sahani Ashish Kumar - - 2013
Accurate measurement of lumen diameter is essential for correct estimation of arterial compliance. We have been developing a new non-invasive arterial compliance measurement tool using a single element ultrasound transceiver. In this paper we propose a new method for measurement of lumen diameter from single line of Radio-Frequency Signal (RF) ...
Chiu Bernard - - 2013
Stroke is among the leading causes of death and disability worldwide. Most strokes are ischemic, mostly caused by the blockage of a cerebral artery by a thrombotic embolus. Carotid atherosclerosis and the subsequent plaque rupture can be a major source of these emboli. It is well known that blood flow ...
Hirano Harutoyo - - 2013
This paper proposes a method for qualitatively estimating the mechanical properties of arterial walls on a beat-to-beat basis through noninvasive measurement of continuous arterial pressure and arterial diameter using an ultrasonic device. First, in order to describe the nonlinear relationships linking arterial pressure waveforms and arterial diameter waveforms as well ...
Lee Jihyun - - 2013
The progression of coronary artery calcification (CAC) has been regarded as an important risk factor of coronary artery disease (CAD), which is the biggest cause of death. Because CAC occurrence increases the risk of CAD by a factor of ten, the one whose coronary artery is calcified should pay more ...
Vogel Beatrice - - 2013
PMCT is a well-known tool of the forensic pathologist. It is employed worldwide. PMCT-angiography offers additional insights. This paper intends to demonstrate possibilities of both methods after cardiac surgery. Exemplary cases with typical findings were selected from our own collection. PMCT was performed as whole body CT (1mm slice, pitch ...
Szajner Maciej M Department of Procedural Radiology and Neuroradiology, Medical University in Lublin, Lublin, - - 2013
Arteriovenous malformation (AVM) is an abnormal connection between arteries and veins, bypassing the capillary system. In most cases, the disorder may be asymptomatic. The objective of endovascular AVM treatment is set individually for each case upon consultations with a neurosurgeon and a neurologist. The endpoint of the treatment should consist ...
Fata Bahar B Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, - - 2013
Delineating the normal postnatal development of the pulmonary artery (PA) and ascending aorta (AA) can inform our understanding of congenital abnormalities, as well as pulmonary and systolic hypertension. We thus conducted the following study to delineate the PA and AA postnatal growth deformation characteristics in an ovine model. MR images ...
Hammer Peter E PE Department of Cardiac Surgery, Boston Children's Hospital, Boston, Massachusetts 02115, USA. - - 2013
Surgical repair of the aortic valve with the use of leaflet grafts made from pericardium has been shown to be a viable option, particularly in children, in whom valve replacement has strong disadvantages. We present guidelines for sizing treated autologous pericardium to fabricate a leaflet graft for single-leaflet replacement. Both ...
Leś Jarosław J Department of Anaesthesiology and Intensive Therapy, Military Institute of Medicine in Warsaw, Poland. - - 2013
The basic form of renal replacement therapy is haemodialysis. The duration and efficacy of this treatment depends on well-functioning vascular access. Short-term or long-term catheters are used if the arterial-venous fistula placement is not possible or not indicated. According to the recommendations of the NKF DOQI (National Kidney Foundation Disease ...
Hartkamp Nolan S - - 2013
In this work a method is described to discern the perfusion territories in the cerebellum that are exclusively supplied by either or both vertebral arteries. In normal vascular anatomy the posterior inferior cerebellar artery (PICA) is supplied exclusively by its ipsilateral vertebral artery. The perfusion territories of the vertebral arteries ...
Kamenskiy Alexey V AV Department of Surgery, University of Nebraska Medical Center, Omaha, - - 2013
Carotid endarterectomy has a long history in stroke prevention, yet controversy remains concerning optimal techniques. Two methods frequently used are endarterectomy with patch angioplasty (CEAP) and eversion endarterectomy (CEE). The objective of this study was to compare hemodynamics-related stress and strain distributions between arteries repaired using CEAP and CEE. Mathematical ...
Wu Fu-Zong - - 2013
Epicardial adipose tissue (EAT) is considered to play a role in the pathogenesis of coronary atherosclerosis. However, whether total EAT volume or location-specific EAT thickness may be a better predictor of obstructive coronary artery disease (CAD) is inconclusive. We investigated whether the total volume or location-specific thickness of EAT measured ...
Wada Tomoyuki - - 2013
The case of a patient with a thoracoabdominal aortic aneurysm accompanied by a shaggy aorta, in whom embolism was prevented by a graft used in debranching and placement of an extracorporeal shunt during thoracic endovascular aortic repair, called the "block and trap method", is presented. Two-staged operations were performed using ...
Zhang H - - 2013
OBJECTIVES: Coronary artery bypass grafting (CABG) is the best therapeutic option for multivessel coronary artery diseases. The internal thoracic artery is usually used for the left anterior descending coronary artery. However, it is still not clear what the best conduit is for non-left anterior descending coronary arteries. This research sought ...
Raba Grzegorz G Department of Gynaecology and Obstetrics, Provincial Hospital, Przemysl, Poland ; Institute of Obstetrics and Medical Lifesaving, University of Rzeszow, - - 2014
Internal iliac artery ligation has been a valued method of treating postpartum haemorrhage saving women's fertility. It is considered as an irreversible procedure with no possibility of recanalisation. The manuscript concerns a case of unilateral recanalisation of the hypogastric artery after ligation as a method of postpartum haemorrhage treatment. 24 ...
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 ...
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, ...
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