Search Results
Results 351 - 400 of 2156
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Strobl Magdalena - - 2013
Background and aims: The use of fractional exhaled nitric oxide (FeNO) has been suggested as a quantitative marker for pulmonary arterial hypertension (PAH) in humans. To further characterize FeNO in PAH we investigated this marker in a rodent model. As there is no standardized technique for FeNO measurement in animals, ...
Toutouzas Konstantinos - - 2013
Microwave radiometry allows noninvasive in vivo measuring of internal temperature of tissues reflecting inflammation. In the present study, we evaluated the predictive accuracy of this method for the diagnosis of coronary artery disease (CAD). Consecutive patients (n=287) scheduled for coronary angiography were included in the study. In carotid arteries of ...
Abdi M - - 2013
The circle of Willis (CoW) is a key asset in brain performance as it supports adequate blood supply to the brain. The lumped method (electrical equivalent circuits) is a useful model to simulate the process of the human cardiovascular system. In this study, the whole cardiovascular system is modeled, using ...
Du Cailar Claude - - 2013
The ZIP technique, a surgical equivalent of the 'Preclose' technique, useful for transcatheter aortic valve implantation or endovascular aortic aneurysm repair is described. While percutaneous closure devices are expensive, need a long learning curve and are associated with primary failure, the ZIP technique is easy and allows a quick, safe ...
Parthasarathy Rajsrinivas R From the Departments of Medicine (R.P., M.K., T.J., K.S.B., A.S.) and Radiology and Diagnostic Imaging (J.L.R.), University of Alberta, Edmonton, Alberta, Canada; and UCLA Stroke Center, Los Angeles, CA - - 2013
Multimodal imaging in acute ischemic stroke defines the extent of arterial collaterals, resultant penumbra, and associated infarct core, yet limitations abound. We identified superficial and deep venous drainage patterns that predict outcomes in patients with a proximal arterial occlusion of the anterior circulation. An observational study that used computed tomography ...
Jainandunsing Jayant S - - 2013
Owing to its elliptical shape, the left ventricle outflow tract (LVOT) area is underestimated by two-dimensional (2D) diameter-based calculations which assume a circular shape. This results in overestimation of aortic stenosis (AS) by the continuity equation. In cases of moderate to severe AS, this overestimation can affect intraoperative clinical decision ...
Hartkamp Nolan S - - 2013
Vessel-encoded (VE) pseudo-continuous arterial spin labeling (p-CASL) is a territorial ASL (T-ASL) technique to identify the perfusion territories of cerebral arteries. The aim of this study was to validate the output of three Vessel-encoded p-CASL image processing methods, k-means clustering with and without subsequent linear analysis and a Bayesian framework, ...
Berg Katherine - - 2013
Radial arterial line placement is an invasive procedure that may result in complications. Validated checklists are central to teaching and assessing procedural skills and may result in improved health care quality. The results of the first step of the validation of a radial arterial line placement checklist are described. A ...
Guo Xin-Bin - - 2013
One case had a symptomatic vertebral artery stenosis coupled with a coincidental unruptured cerebral aneurysm at the same arterial anatomic segment. And another case had an asymptomatic vertebral artery stenosis coupled with a ruptured cerebral aneurysm at the same arterial anatomic segment. They underwent intracranial stenting. Both lesions were treated ...
Mirsharif Qazaleh - - 2013
In recent years researchers have found that alternations in arterial or venular tree of the retinal vasculature are associated with several public health problems such as diabetic retinopathy which is also the leading cause of blindness in the world. A prerequisite for automated assessment of subtle changes in arteries and ...
Jelenc Matija - - 2013
With a skeletonized harvesting technique of the left internal thoracic artery (LITA), opening of the pleural space during dissection can usually be avoided. However, due to the bulging of the ventilated lungs, the LITA graft comes to lie immediately below the sternum at the end of the procedure, which makes ...
Trela J M - - 2013
Intra-arterial (i.a.) and intra-venous (i.v.) regional limb perfusions (RLP) through the median artery and cephalic vein, respectively, have been previously investigated for administration of mesenchymal stem cells (MSCs) to the equine distal limb. Limitations due to thrombosis of the arteries after i.a. RLP and poor distribution of MSCs to the ...
Thomis S - - 2013
There is an increasing use of minimal invasive techniques to treat saphenous vein reflux. Among these radiofrequency ablation (RFA), endovenous laser ablation (EVLA), and foam sclerotherapy are frequently used. A new method of thermal ablation is the steam vein sclerosing (SVS) system. This study evaluates the histological changes after ablation of ...
Zhao Yili - - 2013
Objectives- This study aimed to establish reference ranges for Doppler parameters of the fetal dorsalis pedis artery and to compare them with those of the anterior tibial artery. Methods- Dorsalis pedis artery velocimetry was performed in 138 singleton fetuses. Intraobserver repeatability coefficients and differences between measurements of bilateral legs were ...
Makridis Konstantinos G - - 2013
No study exists that directly measures the distances between posterior portals and the popliteal artery under arthroscopic conditions. To define the anatomic relationship between the neural structures and standard posterior arthroscopic portals and between the popliteal artery and posterior as well as transseptal portals in different knee positions. Descriptive laboratory ...
Kragh John F JF - - 2013
The Combat Ready Clamp is indicated to stop difficult inguinal bleeding on the battlefield, the most common type of junctional bleeding and now the most common cause of preventable battlefield death. The purpose of the present study is to report the data of clamp development to help appliers use it ...
Iverson Ronald E - - 2013
This article summarizes current information on the risk and the assessment of risks for deep venous thrombosis (DVT) resulting from plastic surgery procedures. Risk assessment is the foundation for recommended methods of prevention of DVT and, in turn, possible pulmonary emboli. If prevention fails, treatment of DVT is required to ...
Dobson P F - - 2013
Compression of the ulnar nerve in Guyon's canal is an uncommon phenomenon. Reports of ulnar nerve palsy secondary to ulnar artery pseudoaneurysm at this anatomical location are very rare and equivalent pathology just distal to this site is unheard of. Here we present such a case, which featured a delayed ...
Wang Chenyu - - 2013
The shape of the cavernous segment of the internal carotid artery (CSICA) is various in different people, which makes it difficult to be located and causes a higher possibility of injury in the transsphenoidal approach. Hence, a comprehensive study of the CSICA and a meaningful classification of it are rather ...
Deo Salil V - - 2013
Supravalvar aortic stenosis (SVAS) is a congenital anomaly characterized by a discrete or diffuse narrowing of the ascending aorta. It may also be associated with right-ventricular outflow tract obstruction, aortic valve pathology and coronary ostial stenosis. While present in both familial and sporadic forms, it demonstrates a strong association with ...
Asai Tohru - - 2013
Skeletonization is an advanced technique of graft harvesting for coronary artery bypass grafting (CABG), and while it requires meticulous attention, it has many advantages. For example, skeletonization of internal thoracic artery (ITA) can minimize sternal ischemia and lower the risk of mediastinitis, and is longer and larger than pedicled ITA. ...
Hrapkowicz Tomasz - - 2013
Minimally invasive coronary artery bypass grafting via left anterior small thoracotomy is routinely performed on patients with single coronary artery disease, but recently has been expanded to a larger population as a part of a hybrid treatment in multivessel coronary artery disease. While the methods of internal mammary artery harvesting ...
Dong Jingliang - - 2013
Widely accepted treatment for carotid artery stenosis includes stenting as well as carotid endoarterectomy (CEA), despite complications associated with distal embolism. Therefore pre-screening for evaluating the extent of a stenosis is critically important before undertaking surgical procedures. This study presents and evaluates the feasibility of implementing a virtual computational hemodynamics ...
Aydoğan H - - 2013
Background. The radial artery is the most common site for arterial cannulation. Procedures for improving radial artery cannulation have involved direct visualization of the vessel with ultrasonography (US). The aim of this study evaluate the short axis and long axis radial artery measurements at 0º, 45º, 60º wrist joint angle ...
Relan D - - 2013
For the discovery of biomarkers in the retinal vasculature it is essential to classify vessels into arteries and veins. We automatically classify retinal vessels as arteries or veins based on colour features using a Gaussian Mixture Model, an Expectation-Maximization (GMM-EM) unsupervised classifier, and a quadrant-pairwise approach. Classification is performed on ...
Cao Peng - - 2013
In vitro experimental simulations of blood fluid in carotid artery require ideal phantoms that are as precise as possible. The purpose of this work is to demonstrate a method for carotid phantom fabrication by rapid prototyping technique (RP). By using 3D reconstructed projection of the 3D time-of-flight (TOF) Magnetic Resonance ...
Wu Yanhua - - 2013
Magnetocardiography (MCG) is a complementary or alternative tool for noninvasive detection of coronary artery disease (CAD). The effectiveness of the tool for CAD diagnosis is generally evaluated by statistical analysis. In this study, we present a new method for screening CAD, in which two parameters including the curvature of magnetic ...
Siogkas Panagiotis K - - 2013
Cardiovascular disease is one of the primary causes of morbidity and mortality around the globe. Thus, the diagnosis of critical lesions in coronary arteries is of utmost importance in clinical practice. One useful and efficient method to assess the functional severity of one or multiple lesions in a coronary artery ...
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 ...
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 ...
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