Radial Artery: The direct continuation of the brachial trunk, originating at the bifurcation of the brachial artery opposite the neck of the radius. Its branches may be divided into three groups corresponding to the three regions in which the vessel is situated, the forearm, wrist, and hand.Carotid Arteries: Either of the two principal arteries on both sides of the neck that supply blood to the head and neck; each divides into two branches, the internal carotid artery and the external carotid artery.Intracranial Aneurysm: Abnormal outpouching in the wall of intracranial blood vessels. Most common are the saccular (berry) aneurysms located at branch points in CIRCLE OF WILLIS at the base of the brain. Vessel rupture results in SUBARACHNOID HEMORRHAGE or INTRACRANIAL HEMORRHAGES. Giant aneurysms (>2.5 cm in diameter) may compress adjacent structures, including the OCULOMOTOR NERVE. (From Adams et al., Principles of Neurology, 6th ed, p841)Carotid Artery Diseases: Pathological conditions involving the CAROTID ARTERIES, including the common, internal, and external carotid arteries. ATHEROSCLEROSIS and TRAUMA are relatively frequent causes of carotid artery pathology.Carotid Artery, Internal: Branch of the common carotid artery which supplies the anterior part of the brain, the eye and its appendages, the forehead and nose.Carotid Stenosis: Narrowing or stricture of any part of the CAROTID ARTERIES, most often due to atherosclerotic plaque formation. Ulcerations may form in atherosclerotic plaques and induce THROMBUS formation. Platelet or cholesterol emboli may arise from stenotic carotid lesions and induce a TRANSIENT ISCHEMIC ATTACK; CEREBROVASCULAR ACCIDENT; or temporary blindness (AMAUROSIS FUGAX). (From Adams et al., Principles of Neurology, 6th ed, pp 822-3)Carotid Artery, Common: The two principal arteries supplying the structures of the head and neck. They ascend in the neck, one on each side, and at the level of the upper border of the thyroid cartilage, each divides into two branches, the external (CAROTID ARTERY, EXTERNAL) and internal (CAROTID ARTERY, INTERNAL) carotid arteries.Carotid Artery, External: Branch of the common carotid artery which supplies the exterior of the head, the face, and the greater part of the neck.Aneurysm: Pathological outpouching or sac-like dilatation in the wall of any blood vessel (ARTERIES or VEINS) or the heart (HEART ANEURYSM). It indicates a thin and weakened area in the wall which may later rupture. Aneurysms are classified by location, etiology, or other characteristics.Endarterectomy, Carotid: The excision of the thickened, atheromatous tunica intima of a carotid artery.Cerebral Angiography: Radiography of the vascular system of the brain after injection of a contrast medium.Embolization, Therapeutic: A method of hemostasis utilizing various agents such as Gelfoam, silastic, metal, glass, or plastic pellets, autologous clot, fat, and muscle as emboli. It has been used in the treatment of spinal cord and INTRACRANIAL ARTERIOVENOUS MALFORMATIONS, renal arteriovenous fistulas, gastrointestinal bleeding, epistaxis, hypersplenism, certain highly vascular tumors, traumatic rupture of blood vessels, and control of operative hemorrhage.Aneurysm, Ruptured: The tearing or bursting of the weakened wall of the aneurysmal sac, usually heralded by sudden worsening pain. The great danger of a ruptured aneurysm is the large amount of blood spilling into the surrounding tissues and cavities, causing HEMORRHAGIC SHOCK.Carotid Artery Thrombosis: Blood clot formation in any part of the CAROTID ARTERIES. This may produce CAROTID STENOSIS or occlusion of the vessel, leading to TRANSIENT ISCHEMIC ATTACK; CEREBRAL INFARCTION; or AMAUROSIS FUGAX.Cerebral Arteries: The arterial blood vessels supplying the CEREBRUM.Angiography, Digital Subtraction: A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.Carotid Body: A small cluster of chemoreceptive and supporting cells located near the bifurcation of the internal carotid artery. The carotid body, which is richly supplied with fenestrated capillaries, senses the pH, carbon dioxide, and oxygen concentrations in the blood and plays a crucial role in their homeostatic control.Subarachnoid Hemorrhage: Bleeding into the intracranial or spinal SUBARACHNOID SPACE, most resulting from INTRACRANIAL ANEURYSM rupture. It can occur after traumatic injuries (SUBARACHNOID HEMORRHAGE, TRAUMATIC). Clinical features include HEADACHE; NAUSEA; VOMITING, nuchal rigidity, variable neurological deficits and reduced mental status.Carotid Sinus: The dilated portion of the common carotid artery at its bifurcation into external and internal carotids. It contains baroreceptors which, when stimulated, cause slowing of the heart, vasodilatation, and a fall in blood pressure.Stents: Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.Aneurysm, Infected: Aneurysm due to growth of microorganisms in the arterial wall, or infection arising within preexisting arteriosclerotic aneurysms.Arteries: The vessels carrying blood away from the heart.Magnetic Resonance Angiography: Non-invasive method of vascular imaging and determination of internal anatomy without injection of contrast media or radiation exposure. The technique is used especially in CEREBRAL ANGIOGRAPHY as well as for studies of other vascular structures.Tomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Endarterectomy: Surgical excision, performed under general anesthesia, of the atheromatous tunica intima of an artery. When reconstruction of an artery is performed as an endovascular procedure through a catheter, it is called ATHERECTOMY.Surgical Instruments: Hand-held tools or implements used by health professionals for the performance of surgical tasks.Tunica Intima: The innermost layer of an artery or vein, made up of one layer of endothelial cells and supported by an internal elastic lamina.Treatment Outcome: Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.Tunica Media: The middle layer of blood vessel walls, composed principally of thin, cylindrical, smooth muscle cells and elastic tissue. It accounts for the bulk of the wall of most arteries. The smooth muscle cells are arranged in circular layers around the vessel, and the thickness of the coat varies with the size of the vessel.Angiography: Radiography of blood vessels after injection of a contrast medium.Aortic Aneurysm: An abnormal balloon- or sac-like dilatation in the wall of AORTA.Arteriosclerosis: Thickening and loss of elasticity of the walls of ARTERIES of all sizes. There are many forms classified by the types of lesions and arteries involved, such as ATHEROSCLEROSIS with fatty lesions in the ARTERIAL INTIMA of medium and large muscular arteries.Cerebrovascular Circulation: The circulation of blood through the BLOOD VESSELS of the BRAIN.Ultrasonography, Doppler, Duplex: Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.Carotid Artery, Internal, Dissection: The splitting of the vessel wall in one or both (left and right) internal carotid arteries (CAROTID ARTERY, INTERNAL). Interstitial hemorrhage into the media of the vessel wall can lead to occlusion of the internal carotid artery and aneurysm formation.Ischemic Attack, Transient: Brief reversible episodes of focal, nonconvulsive ischemic dysfunction of the brain having a duration of less than 24 hours, and usually less than one hour, caused by transient thrombotic or embolic blood vessel occlusion or stenosis. Events may be classified by arterial distribution, temporal pattern, or etiology (e.g., embolic vs. thrombotic). (From Adams et al., Principles of Neurology, 6th ed, pp814-6)Blood Flow Velocity: A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.Models, Cardiovascular: Theoretical representations that simulate the behavior or activity of the cardiovascular system, processes, or phenomena; includes the use of mathematical equations, computers and other electronic equipment.Arterial Occlusive Diseases: Pathological processes which result in the partial or complete obstruction of ARTERIES. They are characterized by greatly reduced or absence of blood flow through these vessels. They are also known as arterial insufficiency.Cerebrovascular Disorders: A spectrum of pathological conditions of impaired blood flow in the brain. They can involve vessels (ARTERIES or VEINS) in the CEREBRUM, the CEREBELLUM, and the BRAIN STEM. Major categories include INTRACRANIAL ARTERIOVENOUS MALFORMATIONS; BRAIN ISCHEMIA; CEREBRAL HEMORRHAGE; and others.Cerebral Infarction: The formation of an area of NECROSIS in the CEREBRUM caused by an insufficiency of arterial or venous blood flow. Infarcts of the cerebrum are generally classified by hemisphere (i.e., left vs. right), lobe (e.g., frontal lobe infarction), arterial distribution (e.g., INFARCTION, ANTERIOR CEREBRAL ARTERY), and etiology (e.g., embolic infarction).Endovascular Procedures: Minimally invasive procedures, diagnostic or therapeutic, performed within the BLOOD VESSELS. They may be perfomed via ANGIOSCOPY; INTERVENTIONAL MAGNETIC RESONANCE IMAGING; INTERVENTIONAL RADIOGRAPHY; or INTERVENTIONAL ULTRASONOGRAPHY.Vertebral Artery: The first branch of the SUBCLAVIAN ARTERY with distribution to muscles of the NECK; VERTEBRAE; SPINAL CORD; CEREBELLUM; and interior of the CEREBRUM.Middle Cerebral Artery: The largest of the cerebral arteries. It trifurcates into temporal, frontal, and parietal branches supplying blood to most of the parenchyma of these lobes in the CEREBRAL CORTEX. These are the areas involved in motor, sensory, and speech activities.Aortic Aneurysm, Thoracic: An abnormal balloon- or sac-like dilatation in the wall of the THORACIC AORTA. This proximal descending portion of aorta gives rise to the visceral and the parietal branches above the aortic hiatus at the diaphragm.Carotid Body Tumor: Benign paraganglioma at the bifurcation of the COMMON CAROTID ARTERIES. It can encroach on the parapharyngeal space and produce dysphagia, pain, and cranial nerve palsies.Angioplasty, Balloon: Use of a balloon catheter for dilation of an occluded artery. It is used in treatment of arterial occlusive diseases, including renal artery stenosis and arterial occlusions in the leg. For the specific technique of BALLOON DILATION in coronary arteries, ANGIOPLASTY, BALLOON, CORONARY is available.Intracranial Embolism: Blocking of a blood vessel in the SKULL by an EMBOLUS which can be a blood clot (THROMBUS) or other undissolved material in the blood stream. Most emboli are of cardiac origin and are associated with HEART DISEASES. Other non-cardiac sources of emboli are usually associated with VASCULAR DISEASES.Aneurysm, Dissecting: Aneurysm caused by a tear in the TUNICA INTIMA of a blood vessel leading to interstitial HEMORRHAGE, and splitting (dissecting) of the vessel wall, often involving the AORTA. Dissection between the intima and media causes luminal occlusion. Dissection at the media, or between the media and the outer adventitia causes aneurismal dilation.Intracranial Arteriosclerosis: Vascular diseases characterized by thickening and hardening of the walls of ARTERIES inside the SKULL. There are three subtypes: (1) atherosclerosis with fatty deposits in the ARTERIAL INTIMA; (2) Monckeberg's sclerosis with calcium deposits in the media and (3) arteriolosclerosis involving the small caliber arteries. Clinical signs include HEADACHE; CONFUSION; transient blindness (AMAUROSIS FUGAX); speech impairment; and HEMIPARESIS.Circle of Willis: A polygonal anastomosis at the base of the brain formed by the internal carotid (CAROTID ARTERY, INTERNAL), proximal parts of the anterior, middle, and posterior cerebral arteries (ANTERIOR CEREBRAL ARTERY; MIDDLE CEREBRAL ARTERY; POSTERIOR CEREBRAL ARTERY), the anterior communicating artery and the posterior communicating arteries.Heart Aneurysm: A localized bulging or dilatation in the muscle wall of a heart (MYOCARDIUM), usually in the LEFT VENTRICLE. Blood-filled aneurysms are dangerous because they may burst. Fibrous aneurysms interfere with the heart function through the loss of contractility. True aneurysm is bound by the vessel wall or cardiac wall. False aneurysms are HEMATOMA caused by myocardial rupture.Ultrasonography: The visualization of deep structures of the body by recording the reflections or echoes of ultrasonic pulses directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz.Blood Vessel Prosthesis Implantation: Surgical insertion of BLOOD VESSEL PROSTHESES to repair injured or diseased blood vessels.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Follow-Up Studies: Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.Imaging, Three-Dimensional: The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.Basilar Artery: The artery formed by the union of the right and left vertebral arteries; it runs from the lower to the upper border of the pons, where it bifurcates into the two posterior cerebral arteries.Retrospective Studies: Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.Carotid Artery Injuries: Damages to the CAROTID ARTERIES caused either by blunt force or penetrating trauma, such as CRANIOCEREBRAL TRAUMA; THORACIC INJURIES; and NECK INJURIES. Damaged carotid arteries can lead to CAROTID ARTERY THROMBOSIS; CAROTID-CAVERNOUS SINUS FISTULA; pseudoaneurysm formation; and INTERNAL CAROTID ARTERY DISSECTION. (From Am J Forensic Med Pathol 1997, 18:251; J Trauma 1994, 37:473)Risk Factors: An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.Cranial Nerve Injuries: Dysfunction of one or more cranial nerves causally related to a traumatic injury. Penetrating and nonpenetrating CRANIOCEREBRAL TRAUMA; NECK INJURIES; and trauma to the facial region are conditions associated with cranial nerve injuries.Brachiocephalic Trunk: The first and largest artery branching from the aortic arch. It distributes blood to the right side of the head and neck and to the right arm.Postoperative Complications: Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery.Carotid Intima-Media Thickness: A measurement of the thickness of the carotid artery walls. It is measured by B-mode ULTRASONOGRAPHY and is used as a surrogate marker for ATHEROSCLEROSIS.Brain Ischemia: Localized reduction of blood flow to brain tissue due to arterial obstruction or systemic hypoperfusion. This frequently occurs in conjunction with brain hypoxia (HYPOXIA, BRAIN). Prolonged ischemia is associated with BRAIN INFARCTION.Blood Vessel Prosthesis: Device constructed of either synthetic or biological material that is used for the repair of injured or diseased blood vessels.Neurosurgical Procedures: Surgery performed on the nervous system or its parts.Vascular Surgical Procedures: Operative procedures for the treatment of vascular disorders.Iliac Aneurysm: Abnormal balloon- or sac-like dilatation in the wall of any one of the iliac arteries including the common, the internal, or the external ILIAC ARTERY.Magnetic Resonance Imaging: Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.Platinum: Platinum. A heavy, soft, whitish metal, resembling tin, atomic number 78, atomic weight 195.09, symbol Pt. (From Dorland, 28th ed) It is used in manufacturing equipment for laboratory and industrial use. It occurs as a black powder (platinum black) and as a spongy substance (spongy platinum) and may have been known in Pliny's time as "alutiae".Prospective Studies: Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.Stroke: A group of pathological conditions characterized by sudden, non-convulsive loss of neurological function due to BRAIN ISCHEMIA or INTRACRANIAL HEMORRHAGES. Stroke is classified by the type of tissue NECROSIS, such as the anatomic location, vasculature involved, etiology, age of the affected individual, and hemorrhagic vs. non-hemorrhagic nature. (From Adams et al., Principles of Neurology, 6th ed, pp777-810)Anterior Cerebral Artery: Artery formed by the bifurcation of the internal carotid artery (CAROTID ARTERY, INTERNAL). Branches of the anterior cerebral artery supply the CAUDATE NUCLEUS; INTERNAL CAPSULE; PUTAMEN; SEPTAL NUCLEI; GYRUS CINGULI; and surfaces of the FRONTAL LOBE and PARIETAL LOBE.Femoral Artery: The main artery of the thigh, a continuation of the external iliac artery.Angioplasty: Reconstruction or repair of a blood vessel, which includes the widening of a pathological narrowing of an artery or vein by the removal of atheromatous plaque material and/or the endothelial lining as well, or by dilatation (BALLOON ANGIOPLASTY) to compress an ATHEROMA. Except for ENDARTERECTOMY, usually these procedures are performed via catheterization as minimally invasive ENDOVASCULAR PROCEDURES.Models, Anatomic: Three-dimensional representation to show anatomic structures. Models may be used in place of intact animals or organisms for teaching, practice, and study.Aneurysm, False: Not an aneurysm but a well-defined collection of blood and CONNECTIVE TISSUE outside the wall of a blood vessel or the heart. It is the containment of a ruptured blood vessel or heart, such as sealing a rupture of the left ventricle. False aneurysm is formed by organized THROMBUS and HEMATOMA in surrounding tissue.Blood Pressure: PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.Hemorheology: The deformation and flow behavior of BLOOD and its elements i.e., PLASMA; ERYTHROCYTES; WHITE BLOOD CELLS; and BLOOD PLATELETS.Recurrence: The return of a sign, symptom, or disease after a remission.Cerebral Revascularization: Microsurgical revascularization to improve intracranial circulation. It usually involves joining the extracranial circulation to the intracranial circulation but may include extracranial revascularization (e.g., subclavian-vertebral artery bypass, subclavian-external carotid artery bypass). It is performed by joining two arteries (direct anastomosis or use of graft) or by free autologous transplantation of highly vascularized tissue to the surface of the brain.Constriction, Pathologic: The condition of an anatomical structure's being constricted beyond normal dimensions.Hemodynamics: The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.Renal Artery: A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters.Catheterization: Use or insertion of a tubular device into a duct, blood vessel, hollow organ, or body cavity for injecting or withdrawing fluids for diagnostic or therapeutic purposes. It differs from INTUBATION in that the tube here is used to restore or maintain patency in obstructions.Regional Blood Flow: The flow of BLOOD through or around an organ or region of the body.Craniotomy: Any operation on the cranium or incision into the cranium. (Dorland, 28th ed)Klippel-Feil Syndrome: A syndrome characterised by a low hairline and a shortened neck resulting from a reduced number of vertebrae or the fusion of multiple hemivertebrae into one osseous mass.Iliac Artery: Either of two large arteries originating from the abdominal aorta; they supply blood to the pelvis, abdominal wall and legs.Stress, Mechanical: A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area.Ligation: Application of a ligature to tie a vessel or strangulate a part.Pulmonary Artery: The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.Brain: The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.Aorta, Abdominal: The aorta from the DIAPHRAGM to the bifurcation into the right and left common iliac arteries.Microsurgery: The performance of surgical procedures with the aid of a microscope.Rupture, Spontaneous: Tear or break of an organ, vessel or other soft part of the body, occurring in the absence of external force.Balloon Occlusion: Use of a balloon CATHETER to block the flow of blood through an artery or vein.Coronary Aneurysm: Abnormal balloon- or sac-like dilatation in the wall of CORONARY VESSELS. Most coronary aneurysms are due to CORONARY ATHEROSCLEROSIS, and the rest are due to inflammatory diseases, such as KAWASAKI DISEASE.Predictive Value of Tests: In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.Ultrasonography, Doppler, Color: Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.Sensitivity and Specificity: Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)Subclavian Artery: Artery arising from the brachiocephalic trunk on the right side and from the arch of the aorta on the left side. It distributes to the neck, thoracic wall, spinal cord, brain, meninges, and upper limb.Equipment Design: Methods of creating machines and devices.Atherosclerosis: A thickening and loss of elasticity of the walls of ARTERIES that occurs with formation of ATHEROSCLEROTIC PLAQUES within the ARTERIAL INTIMA.Reproducibility of Results: The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.Ophthalmic Artery: Artery originating from the internal carotid artery and distributing to the eye, orbit and adjacent facial structures.Cerebral Hemorrhage: Bleeding into one or both CEREBRAL HEMISPHERES including the BASAL GANGLIA and the CEREBRAL CORTEX. It is often associated with HYPERTENSION and CRANIOCEREBRAL TRAUMA.Neck: The part of a human or animal body connecting the HEAD to the rest of the body.Infarction, Middle Cerebral Artery: NECROSIS occurring in the MIDDLE CEREBRAL ARTERY distribution system which brings blood to the entire lateral aspects of each CEREBRAL HEMISPHERE. Clinical signs include impaired cognition; APHASIA; AGRAPHIA; weak and numbness in the face and arms, contralaterally or bilaterally depending on the infarction.Intracranial Embolism and Thrombosis: Embolism or thrombosis involving blood vessels which supply intracranial structures. Emboli may originate from extracranial or intracranial sources. Thrombosis may occur in arterial or venous structures.Disease Models, Animal: Naturally occurring or experimentally induced animal diseases with pathological processes sufficiently similar to those of human diseases. They are used as study models for human diseases.Chemoreceptor Cells: Cells specialized to detect chemical substances and relay that information centrally in the nervous system. Chemoreceptor cells may monitor external stimuli, as in TASTE and OLFACTION, or internal stimuli, such as the concentrations of OXYGEN and CARBON DIOXIDE in the blood.Cerebral Veins: Veins draining the cerebrum.Glasgow Outcome Scale: A scale that assesses the outcome of serious craniocerebral injuries, based on the level of regained social functioning.Aortography: Radiographic visualization of the aorta and its branches by injection of contrast media, using percutaneous puncture or catheterization procedures.Aortic Rupture: The tearing or bursting of the wall along any portion of the AORTA, such as thoracic or abdominal. It may result from the rupture of an aneurysm or it may be due to TRAUMA.Cerebral Palsy: A heterogeneous group of nonprogressive motor disorders caused by chronic brain injuries that originate in the prenatal period, perinatal period, or first few years of life. The four major subtypes are spastic, athetoid, ataxic, and mixed cerebral palsy, with spastic forms being the most common. The motor disorder may range from difficulties with fine motor control to severe spasticity (see MUSCLE SPASTICITY) in all limbs. Spastic diplegia (Little disease) is the most common subtype, and is characterized by spasticity that is more prominent in the legs than in the arms. Pathologically, this condition may be associated with LEUKOMALACIA, PERIVENTRICULAR. (From Dev Med Child Neurol 1998 Aug;40(8):520-7)Muscle, Smooth, Vascular: The nonstriated involuntary muscle tissue of blood vessels.Risk Assessment: The qualitative or quantitative estimation of the likelihood of adverse effects that may result from exposure to specified health hazards or from the absence of beneficial influences. (Last, Dictionary of Epidemiology, 1988)Mesenteric Arteries: Arteries which arise from the abdominal aorta and distribute to most of the intestines.Pulsatile Flow: Rhythmic, intermittent propagation of a fluid through a BLOOD VESSEL or piping system, in contrast to constant, smooth propagation, which produces laminar flow.Coronary Vessels: The veins and arteries of the HEART.Retreatment: The therapy of the same disease in a patient, with the same agent or procedure repeated after initial treatment, or with an additional or alternate measure or follow-up. It does not include therapy which requires more than one administration of a therapeutic agent or regimen. Retreatment is often used with reference to a different modality when the original one was inadequate, harmful, or unsuccessful.Coronary Angiography: Radiography of the vascular system of the heart muscle after injection of a contrast medium.Pressoreceptors: Receptors in the vascular system, particularly the aorta and carotid sinus, which are sensitive to stretch of the vessel walls.Dogs: The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)Image Processing, Computer-Assisted: A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.Coated Materials, Biocompatible: Biocompatible materials usually used in dental and bone implants that enhance biologic fixation, thereby increasing the bond strength between the coated material and bone, and minimize possible biological effects that may result from the implant itself.Prosthesis Design: The plan and delineation of prostheses in general or a specific prosthesis.Feasibility Studies: Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.Coronary Artery Bypass: Surgical therapy of ischemic coronary artery disease achieved by grafting a section of saphenous vein, internal mammary artery, or other substitute between the aorta and the obstructed coronary artery distal to the obstructive lesion.Image Enhancement: Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.Radiography, Interventional: Diagnostic and therapeutic procedures that are invasive or surgical in nature, and require the expertise of a specially trained radiologist. In general, they are more invasive than diagnostic imaging but less invasive than major surgery. They often involve catheterization, fluoroscopy, or computed tomography. Some examples include percutaneous transhepatic cholangiography, percutaneous transthoracic biopsy, balloon angioplasty, and arterial embolization.Intracranial Thrombosis: Formation or presence of a blood clot (THROMBUS) in a blood vessel within the SKULL. Intracranial thrombosis can lead to thrombotic occlusions and BRAIN INFARCTION. The majority of the thrombotic occlusions are associated with ATHEROSCLEROSIS.Cranial Nerve Diseases: Disorders of one or more of the twelve cranial nerves. With the exception of the optic and olfactory nerves, this includes disorders of the brain stem nuclei from which the cranial nerves originate or terminate.Jugular Veins: Veins in the neck which drain the brain, face, and neck into the brachiocephalic or subclavian veins.Rats, Sprague-Dawley: A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company.Severity of Illness Index: Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.Ultrasonography, Doppler, Transcranial: A non-invasive technique using ultrasound for the measurement of cerebrovascular hemodynamics, particularly cerebral blood flow velocity and cerebral collateral flow. With a high-intensity, low-frequency pulse probe, the intracranial arteries may be studied transtemporally, transorbitally, or from below the foramen magnum.Amaurosis Fugax: Transient complete or partial monocular blindness due to retinal ischemia. This may be caused by emboli from the CAROTID ARTERY (usually in association with CAROTID STENOSIS) and other locations that enter the central RETINAL ARTERY. (From Adams et al., Principles of Neurology, 6th ed, p245)Brachial Artery: The continuation of the axillary artery; it branches into the radial and ulnar arteries.Mammary Arteries: Arteries originating from the subclavian or axillary arteries and distributing to the anterior thoracic wall, mediastinal structures, diaphragm, pectoral muscles and mammary gland.Elastic Tissue: Connective tissue comprised chiefly of elastic fibers. Elastic fibers have two components: ELASTIN and MICROFIBRILS.Ultrasonography, Doppler: Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed)Splenic Artery: The largest branch of the celiac trunk with distribution to the spleen, pancreas, stomach and greater omentum.Coronary Stenosis: Narrowing or constriction of a coronary artery.Vasospasm, Intracranial: Constriction of arteries in the SKULL due to sudden, sharp, and often persistent smooth muscle contraction in blood vessels. Intracranial vasospasm results in reduced vessel lumen caliber, restricted blood flow to the brain, and BRAIN ISCHEMIA that may lead to hypoxic-ischemic brain injury (HYPOXIA-ISCHEMIA, BRAIN).Intraoperative Complications: Complications that affect patients during surgery. They may or may not be associated with the disease for which the surgery is done, or within the same surgical procedure.Aorta, Thoracic: The portion of the descending aorta proceeding from the arch of the aorta and extending to the DIAPHRAGM, eventually connecting to the ABDOMINAL AORTA.Temporal Arteries: Arteries arising from the external carotid or the maxillary artery and distributing to the temporal region.Celiac Artery: The arterial trunk that arises from the abdominal aorta and after a short course divides into the left gastric, common hepatic and splenic arteries.Intracranial Arteriovenous Malformations: Congenital vascular anomalies in the brain characterized by direct communication between an artery and a vein without passing through the CAPILLARIES. The locations and size of the shunts determine the symptoms including HEADACHES; SEIZURES; STROKE; INTRACRANIAL HEMORRHAGES; mass effect; and vascular steal effect.Endothelium, Vascular: Single pavement layer of cells which line the luminal surface of the entire vascular system and regulate the transport of macromolecules and blood components.Plaque, Atherosclerotic: Lesions formed within the walls of ARTERIES.Vascular Patency: The degree to which BLOOD VESSELS are not blocked or obstructed.Equipment Failure Analysis: The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.Thrombosis: Formation and development of a thrombus or blood clot in the blood vessel.Observer Variation: The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).Hypertension: Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more.Disease Progression: The worsening of a disease over time. This concept is most often used for chronic and incurable diseases where the stage of the disease is an important determinant of therapy and prognosis.Neurologic Examination: Assessment of sensory and motor responses and reflexes that is used to determine impairment of the nervous system.Rabbits: The species Oryctolagus cuniculus, in the family Leporidae, order LAGOMORPHA. Rabbits are born in burrows, furless, and with eyes and ears closed. In contrast with HARES, rabbits have 22 chromosome pairs.Fatal Outcome: Death resulting from the presence of a disease in an individual, as shown by a single case report or a limited number of patients. This should be differentiated from DEATH, the physiological cessation of life and from MORTALITY, an epidemiological or statistical concept.Cavernous Sinus: An irregularly shaped venous space in the dura mater at either side of the sphenoid bone.Contrast Media: Substances used to allow enhanced visualization of tissues.Coronary Artery Disease: Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.Prostheses and Implants: Artificial substitutes for body parts, and materials inserted into tissue for functional, cosmetic, or therapeutic purposes. Prostheses can be functional, as in the case of artificial arms and legs, or cosmetic, as in the case of an artificial eye. Implants, all surgically inserted or grafted into the body, tend to be used therapeutically. IMPLANTS, EXPERIMENTAL is available for those used experimentally.Constriction: The act of constricting.Calcinosis: Pathologic deposition of calcium salts in tissues.Angioplasty, Balloon, Coronary: Dilation of an occluded coronary artery (or arteries) by means of a balloon catheter to restore myocardial blood supply.Incidence: The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from PREVALENCE, which refers to all cases, new or old, in the population at a given time.Shear Strength: The internal resistance of a material to moving some parts of it parallel to a fixed plane, in contrast to stretching (TENSILE STRENGTH) or compression (COMPRESSIVE STRENGTH). Ionic crystals are brittle because, when subjected to shear, ions of the same charge are brought next to each other, which causes repulsion.Mesenteric Artery, Superior: A large vessel supplying the whole length of the small intestine except the superior part of the duodenum. It also supplies the cecum and the ascending part of the colon and about half the transverse part of the colon. It arises from the anterior surface of the aorta below the celiac artery at the level of the first lumbar vertebra.Drug-Eluting Stents: Stents that are covered with materials that are embedded with chemicals that are gradually released into the surrounding milieu.Computer Simulation: Computer-based representation of physical systems and phenomena such as chemical processes.Neurosurgery: A surgical specialty concerned with the treatment of diseases and disorders of the brain, spinal cord, and peripheral and sympathetic nervous system.Embolism: Blocking of a blood vessel by an embolus which can be a blood clot or other undissolved material in the blood stream.Polyethylene Terephthalates: Polyester polymers formed from terephthalic acid or its esters and ethylene glycol. They can be formed into tapes, films or pulled into fibers that are pressed into meshes or woven into fabrics.Malaria, Cerebral: A condition characterized by somnolence or coma in the presence of an acute infection with PLASMODIUM FALCIPARUM (and rarely other Plasmodium species). Initial clinical manifestations include HEADACHES; SEIZURES; and alterations of mentation followed by a rapid progression to COMA. Pathologic features include cerebral capillaries filled with parasitized erythrocytes and multiple small foci of cortical and subcortical necrosis. (From Adams et al., Principles of Neurology, 6th ed, p136)Posterior Cerebral Artery: Artery formed by the bifurcation of the BASILAR ARTERY. Branches of the posterior cerebral artery supply portions of the OCCIPITAL LOBE; PARIETAL LOBE; inferior temporal gyrus, brainstem, and CHOROID PLEXUS.Compliance: Distensibility measure of a chamber such as the lungs (LUNG COMPLIANCE) or bladder. Compliance is expressed as a change in volume per unit change in pressure.Vasodilation: The physiological widening of BLOOD VESSELS by relaxing the underlying VASCULAR SMOOTH MUSCLE.Silicones: A broad family of synthetic organosiloxane polymers containing a repeating silicon-oxygen backbone with organic side groups attached via carbon-silicon bonds. Depending on their structure, they are classified as liquids, gels, and elastomers. (From Merck Index, 12th ed)Anastomosis, Surgical: Surgical union or shunt between ducts, tubes or vessels. It may be end-to-end, end-to-side, side-to-end, or side-to-side.Collateral Circulation: Maintenance of blood flow to an organ despite obstruction of a principal vessel. Blood flow is maintained through small vessels.Cohort Studies: Studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics.Hyperplasia: An increase in the number of cells in a tissue or organ without tumor formation. It differs from HYPERTROPHY, which is an increase in bulk without an increase in the number of cells.Retinal Artery Occlusion: Sudden ISCHEMIA in the RETINA due to blocked blood flow through the CENTRAL RETINAL ARTERY or its branches leading to sudden complete or partial loss of vision, respectively, in the eye.Immunohistochemistry: Histochemical localization of immunoreactive substances using labeled antibodies as reagents.Intraoperative Care: Patient care procedures performed during the operation that are ancillary to the actual surgery. It includes monitoring, fluid therapy, medication, transfusion, anesthesia, radiography, and laboratory tests.Aorta: The main trunk of the systemic arteries.Aortic Diseases: Pathological processes involving any part of the AORTA.Vasoconstriction: The physiological narrowing of BLOOD VESSELS by contraction of the VASCULAR SMOOTH MUSCLE.Videodisc Recording: The storing of visual and usually sound signals on discs for later reproduction on a television screen or monitor.Monitoring, Intraoperative: The constant checking on the state or condition of a patient during the course of a surgical operation (e.g., checking of vital signs).Hepatic Artery: A branch of the celiac artery that distributes to the stomach, pancreas, duodenum, liver, gallbladder, and greater omentum.Elasticity: Resistance and recovery from distortion of shape.Vertebrobasilar Insufficiency: Localized or diffuse reduction in blood flow through the vertebrobasilar arterial system, which supplies the BRAIN STEM; CEREBELLUM; OCCIPITAL LOBE; medial TEMPORAL LOBE; and THALAMUS. Characteristic clinical features include SYNCOPE; lightheadedness; visual disturbances; and VERTIGO. BRAIN STEM INFARCTIONS or other BRAIN INFARCTION may be associated.Radiographic Image Interpretation, Computer-Assisted: Computer systems or networks designed to provide radiographic interpretive information.

*Posterior communicating artery

... it connects to the internal carotid artery (ICA) prior to the terminal bifurcation of the ICA into the anterior cerebral artery ... Aneurysms of the posterior communicating artery are the third most common circle of Willis aneurysm (the most common are ... The brain is supplied with blood by the internal carotid arteries and also by the posterior cerebral arteries; the posterior ... About 20% of adults retain PCA origin from the posterior communicating artery, and in turn, the internal carotid arteries. Beck ...

*Internal carotid artery

... neuroangio.org/anatomy-and-variants/internal-carotid-artery-and-its-aneurysms Aneurysms of the Internal Carotid Artery. ... artery the anterior choroidal artery The internal carotid then divides to form the anterior cerebral artery and middle cerebral ... this segment extends from the origin of the posterior communicating artery to the bifurcation of the internal carotid artery. ... the internal carotid artery is somewhat dilated. This part of the artery is known as the carotid sinus or the carotid bulb. The ...

*Moyamoya disease

These vessels are the ACA (anterior cerebral artery), MCA (middle cerebral artery), and ICA (internal carotid artery). The ... aneurysm and thrombosis. On conventional X-ray angiography, these collateral vessels have the appearance of a "puff of smoke" ( ... "stenosis of the distal ICA's up to and including the bifurcation, along with segments of the proximal ACA and MCA...dilated ... branches of the internal carotid artery inside the skull. When the internal carotid artery becomes completely blocked, the fine ...
TY - JOUR. T1 - Transradial coronary intervention. T2 - Comparison of the left and right radial artery approach. AU - Kim, Jang Young. AU - Yoon, Junghan. AU - Jung, Il Hyung. AU - Wang, Hee Sung. AU - Jung, Hyun Sook. AU - Yoo, Byung Su. AU - Lee, Seung Hwan. AU - Choe, Kyung Hoon. PY - 2006/12. Y1 - 2006/12. N2 - Background and Objectives: We evaluated the efficacy and safety of the left transradial approach as compared to the right radial approach when performing transradial coronary intervention. Subjects and Methods: We performed the transradial coronary intervention in 711 cases via the left approach (Lt. group) and in 614 cases via the right approach (Rt. group) for patients with a normal Allens test of both arms. We evaluated the procedural success rate, the crossover rate, the puncture time, the total procedural duration, the fluoros copy time, the amount of contrast agent used and the local vascular complications of both groups. Results: The baseline clinical and angiographic ...
Background: Remodeling of the radial artery (RA) after transradial percutaneous coronary intervention (TRI) is under studied. Objectives: To examine the impact of TRI on RA diameter and intimal-medial thickness (IMT) in men and women using 55 Mhz ultrahigh frequency duplex ultrasound (UHFDU). Methods: We performed UHFDU at 24 h and 90 days after non-emergent TRI in 41 patients (25 men, 16 women). Changes in RA diameter, IMT and RA injury were compared by patient gender. Multivariate linear regression was used to determine the predictors of RA diameter and IMT.
BACKGROUND The transradial approach for percutaneous coronary procedures has the advantage of reduced access site complications but is associated with specific technical challenges in comparison with the transfemoral approach. Transradial procedure failures can sometimes be due to variation in radial artery anatomy. However, data describing such variations are limited. OBJECTIVE To evaluate the incidence and impact of radial artery anomalies in patients undergoing transradial coronary procedures. METHODS Retrograde radial arteriography was performed in all patients presenting for a first-time radial procedure. Patient characteristics, radial artery anatomy and procedural outcome were assessed. RESULTS 1540 consecutive patients were studied, 70.6% male, mean (SD) age 63.6 (11.1) years. The overall incidence of radial artery anomaly was 13.8% (n = 212). 108 (7.0%) patients had a high-bifurcating radial origin, 35 (2.3%) had a full radial ...
Transradial approach has gained progressive acceptance because it has been shown to have fewer hemorrhagic and vascular-related complications than the femoral approach does for diagnostic and therapeutic percutaneous coronary artery procedures. However, transradial access is not free of complications (1). A 43-year-old man was admitted with a non-ST-segment elevation acute coronary syndrome. A transradial coronary angiography was performed, followed by a drug-eluting stent implantation in the proximal descendent artery. Twenty-four hours after the procedure, he experienced an intense, continuous chest pain in his right upper hemi-thorax that irradiated to the right forearm, without electrocardiographic changes or elevated markers of myocardial damage, and required a high dose of analgesia. A computed tomogram was performed, revealing a subclavian artery pseudoaneurysm that compressed the brachial plexus (Figs. 1A to 1D). A few days later, an ...
U.S., Feb. 9 -- ClinicalTrials.gov registry received information related to the study (NCT03042845) titled Randomized Comparison of JUDkins vs tiGEr Catheter in Coronary Angiography Via the Right Radial Artery: the JUDGE Study on Feb. 1. Brief Summary: The investigators aim to assess safety and efficiency of Tiger II (5Fr; Terumo Interventional Systems, Somerset, New Jersey) vs Judkins (5Fr; 3.5L/4R, Medtronic Co) catheters, in coronary angiography via the right transradial route. This is a prospective, randomized, study of parallel design. Consecutive patients with acute coronary syndrome (ACS), eligible for non-urgent coronary angiography, are randomized after successful cannulation of right radial artery and informed consent to either Tigger II or Judkins 3.5L/4R catheters. Study Start Date: Study Type: Interventional Condition: Coronary Artery Disease Intervention: Device: Tiger cardiac catheter Tiger cardiac catheter Device: Judkins 3.5L/4R cardiac ...
Our study shows that in patients with mild CHF radial artery compliance was less than in control normotensive and hypertensive subjects. However, it also shows that in these patients 4- and 8-week administrations of benazepril at a dose that clearly interfered with the renin-angiotensin system were accompanied by an increase in arterial compliance that made its values similar to those of the two control groups, in which an observational period or ACE inhibitor treatment of similar duration had no effect. This provides the first evidence that the reduction of radial artery compliance occurring in mild CHF1 2 is not irreversible. On the contrary, this reduction is improved by ACE inhibitor treatment, and the improvement can be such as to quickly, completely, and persistently reverse the compliance alteration characterizing this condition.1 2 The mechanisms responsible for the impairment of radial artery compliance in CHF patients are not known. However, it can ...
Transradial catheterization is an endovascular procedure or catherization procedure performed to diagnose and treat arterial disease (e.g., coronary artery disease, peripheral artery disease, etc.). Endovascular procedure can be performed achieving access in to bodys arterial system from either femoral artery (in groin), brachial artery (in elbow) or radial artery in the wrist. The transfemoral (through groin) approach to perform cardiac catheterization has typically been more prevalent in invasive cardiology. But, radial access has gained in popularity due to technical advances with catheters and lower complication rates than transfemoral access. In 1948, Radner published one of the first descriptions of transradial central arterial catheterization and attempts at coronary artery imaging using radial artery cut-down. Transradial access to perform diagnostic cardiac catheterization ...
Our results demonstrate a statistically significant and clinically relevant reduction in the incidence of 30-day RAO using prophylactic ipsilateral ulnar artery compression while compressing the radial artery for hemostasis after TRA. In fact, using that prophylactic technique, RAO was significantly reduced at all time intervals. With a rapidly growing adoption of TRA worldwide with a large mix of operators at several stages of the learning curve and increasing patient as well as procedural complexity, RAO prevention should take center stage to preserve the safest access site in a patient with a chronic recurrent illness such as atherosclerotic vascular disease.. Presence of radial artery patency during hemostatic compression has been shown to be associated with a lower incidence of RAO (25). Patent hemostasis, defined as persistence of antegrade flow in the radial artery during hemostatic compression, has been shown to significantly lower ...
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At our institution, we frequently use radial artery access for cerebral angiography and neurointerventional procedures.6 Use of the radial artery access site has been widely documented in the cardiac and neuroradiology literature to be a safe alternative to the common femoral and brachial artery routes.1-6 A 4-vessel cerebral angiogram is easily performed through the radial artery, and neurointerventional procedures can be performed in the right vertebral and carotid arteries by using sheaths up to 6F.5,6 As demonstrated in our Technical Note, the ulnar artery provides an alternative approach to the radial, brachial, and axillary arteries when traditional transfemoral access is not possible.. In a prospective randomized trial comparing the radial and ulnar artery access routes for coronary procedures, Aptecar et al7 demonstrated that the ...
To the editor: In their response to Raffins (1) review of indications for arterial blood gas analysis, Williams and Schenken (2) take exception to Dr. Raffins statement "An Allen test should be done to assess adequacy of collateral circulation." Further, Williams and Schenken state "that mandatory use of the Allen test before radial artery puncture is not of practical benefit and that the test should, at most, be considered optional.". We believe the performance of the Allen test before radial artery puncture is of practical value for the reasons stated in Allens (3) article: "The compression test on the ulnar ...
TY - JOUR. T1 - Is early age-related macular degeneration related to carotid artery stiffness? The Atherosclerosis Risk in Communities Study. AU - Cheung, Ning. AU - Liao, Duanping. AU - Islam, F. M.Amirul. AU - Klein, Ronald. AU - Jie, Jin Wang. AU - Wong, Tien Yin. PY - 2007/4/1. Y1 - 2007/4/1. N2 - Background/Purpose: Atherosclerosis and vascular stiffness have been implicated in the pathogenesis of age-related macular degeneration (AMD). The association of carotid artery stiffness, a measure of arterial elasticity reflecting early atherosclerosis, with early AMD, was examined in this study. Methods: A population-based, cross-sectional study of 9954 middle-aged people (age range 51-72 years). The presence of AMD signs was determined from fundus photographs according to the Wisconsin grading protocol. Carotid arterial stiffness was measured from high-resolution ultrasonic ...
Vascular morbidity and mortality due to cardiovascular disease (CVD) are high after ischemic stroke at a young age. Data on carotid intima-media thickness (cIMT) as marker of atherosclerosis are scarce for young stroke populations. In this prospective case-control study, we examined cIMT, the burden of vascular risk factors (RF) and their associations among young and middle-aged ischemic stroke patients and controls. We aimed to detect clinical and sub-clinical arterial disease. This study was conducted in 150 patients aged 15-60 years and 84 controls free of CVD. We related RF to ultrasonographic B-mode cIMT-measurements obtained from 12 standardized multiangle measurements in the common carotid artery (CCA), carotid bifurcation (BIF) and internal carotid artery (ICA). RF burden was higher among patients ...
OZCETIN, Mustafa et al. The importance of carotid artery stiffness and increased intima-media thickness in obese children. SAMJ, S. Afr. med. j. [online]. 2012, vol.102, n.5, pp.295-299. ISSN 2078-5135.. BACKGROUND: Atherosclerosis that starts in childhood invariably advances during adulthood. AIM: We aimed to study the effect of obesity on main carotid artery intima-media thickness (CIMT) and arterial stiffness. MATERIAL AND METHODS: A total of 78 children were studied from October 2010 to February 2011. They were divided into obese (n=42, group 1) and normal (n=36, group 2). All children were subjected to physical examination, routine biochemical and haematological analysis, carotid ultrasonography and echocardiographic measurements. A detailed medical history was obtained. Body mass index (BMI) was calculated by dividing participants weight in kilograms by the square of ...
Superficial palmar arch arises just above the wrist, enters the palm of hand and joins the ulnar artery to form the superficial palmar arch.. In the dorsum of hand, it winds around the lateral margin of the wrist joint, beneath the tendons of abductor pollicis longus and extensor pollicis brevis. On reaching the dorsum, it descends beneath the tendon of extensor pollicis longus to reach the interval between the heads of first dorsal interosseous muscle.. Branches of the radial artery in the dorsum take part in the anastomosis around the wrist joint.. The dorsal digital arteries pass to the thumb and the index finger.. Radial artery leaves the dorsum by turning forward between the proximal ends of the first and second metacarpal bones and the two heads of first dosral interosseous muscle.. On entering the palm, radial artery curves medially between the oblique and transverse heads of adductor pollicis and continues as the deep palmar arch.. ...
In anatomy, the left and right common carotid arteries (carotids) (English: /kəˈrɒtɪd/) are arteries that supply the head and neck with oxygenated blood; they divide in the neck to form the external and internal carotid arteries. The common carotid arteries are present on the left and right sides of the body. These arteries originate from different arteries, but follow symmetrical courses. The right common carotid originates in the neck from the brachiocephalic trunk; the left from the aortic arch in the thorax. These split into the external and internal carotid arteries at the upper border of the thyroid cartilage, at around the level of the fourth cervical vertebra. The left common carotid artery can be thought of as ...
INTRODUCTION: High-flow extracranial-intracranial (EC-IC) bypass and aneurysm trapping constitutes a well-known surgical solution for internal carotid artery (ICA) aneurysms that are not amenable to clip ligation or endovascular therapy. The advantag
Experiments in tissue culture using hydroxamic and phosphinic acid-based inhibitors show that MMPs are necessary for both maximal proliferation and migration of rabbit aortic SMCs.11 Furthermore, MMP inhibitors also prevent intimal migration of rat carotid artery SMCs after balloon injury in vivo.13 In rabbit SMCs, only gelatinases A and B are expressed in measurable quantities,11 which emphasize their role in modulating migration and proliferation in this model, which contains only SMCs. In the rat carotid artery, injury increases tissue levels of gelatinase B and activates gelatinase A,13 19 further implicating gelatinases in the response to injury. In the present study, we also investigated the expression of gelatinases after balloon injury, but in this case, a pig carotid artery model in which both deep medial tears and stretch-induced injury occur was ...
TY - JOUR. T1 - Aplasia of the radial artery. AU - Odero, A.. AU - Chierichetti, F.. AU - Canidio, E.. AU - Savasta, S.. PY - 1993/6. Y1 - 1993/6. N2 - A 2-year-old girl with asymmetrical upper limbs and underdevelopment of the bones of the left forearm, wrist and hand with associated muscular and osteal hypoplasia is described. Doppler ultrasonography of the arterial trunks of the upper limb suggested a normal ulnar trunk in the left upper arm, an arterial vessel extending from the bend of the elbow to the distal third of the forearm, and the absence of any other arterial trunks in the radial region. Angiography confirmed that vascularization of the forearm was sustained by the ulnar artery, which supported the dorsal arch of the carpus and digital arteries arising from it. The interosseal artery was morphologically normal but there was aplasia of the radial artery. It is suggested that this malformation is the result of suppressed ...
The purpose of the study is to investigate the hemodynamic effect of calcified carotid plaque on blood flow in patients diagnosed with carotid artery disease. Two carotid artery models were generated based on a sample patient data, with normal and calcified carotid artery appearances. Circular calcified carotid plaque was found at the carotid bifurcation based on 3D computed tomography images. A computational fluid dynamics was performed to analyze the changes of blood flow in different situations. Our results showed that apparent turbulence was found in the diastolic phase at the carotid bifurcation in normal carotid artery geometry. In the ...
Stroke is the third-leading cause of death in America, and carotid artery stenosis-also known as carotid artery disease-is one of the leading risk factors for stroke, accounting for about 20 percent of strokes. To mark National Stroke Month in May, we asked University of Minnesota Health Neurosurgeon and Neurointerventionist Ramachandra Tummala, MD, to tell us five things we should know about carotid artery stenosis and its link to stroke risk.. Carotid stenosis occurs when buildup begins blocking blood flow.. Stenosis is a medical term for narrowing of blood vessels in the body due to a buildup of inflammatory substances and cholesterol deposits-called plaque. Two carotid arteries in the neck carry most of the blood flow from the heart to the brain. When stenosis occurs in these arteries it ...
A carotid artery duplex scan is a type of vascular ultrasound study done to assess the blood flow of the arteries that supply blood from the heart through the neck to the brain. There are six carotid arteries--the right and left common carotid arteries, which divide and form the right and left internal carotid arteries and the right and left external carotid arteries. One pair (external and internal) is located on each side of the neck.. A carotid artery duplex scan is a noninvasive (the skin is not pierced) procedure. The term "duplex" refers to the fact that two modes of ultrasound are used--Doppler and B-mode. The B-mode transducer (like a microphone) obtains an image of the carotid ...
Have you been told you have diseased or clogged carotid arteries (carotid stenosis)? Are you nervous about what this may mean in terms of your risk of stroke? Here are some answers to commonly asked questions regarding carotid artery disease.. What are the carotid arteries?. Carotid arteries are the two main blood vessels that supply most of your brain with blood.. What is a carotid bruit and does it definitely mean that the carotid is blocked?. A carotid bruit is a swooshing sound heard during a physical exam in which the physician listens to the sound of blood flow through the neck. When blood passes through a narrowing channel, it will give a very distinctive sound when heard through a stethoscope. Approximately 30 ...
The internal carotid artery is a major paired artery, one on each side of the head and neck, in human anatomy. They arise from the common carotid arteries where these bifurcate into the internal and external carotid arteries at cervical vertebral level 3 or 4; the internal carotid artery supplies the brain, while the external carotid nourishes other portions of the head, such as face, scalp, skull, and meninges. Terminologia Anatomica in 1998 subdivided the artery into four parts: "cervical", "petrous", "cavernous", and "cerebral". However, in clinical settings, the classification system of the internal carotid artery usually follows the ...
TY - JOUR. T1 - Carotid artery atherosclerosis, MRI indices of brain ischemia, aging, and cognitive impairment. T2 - The framingham study. AU - Romero, José R.. AU - Beiser, Alexa. AU - Seshadri, Sudha. AU - Benjamin, Emelia J.. AU - Polak, Joseph F.. AU - Vasan, Ramachandran S.. AU - Au, Rhoda. AU - Decarli, Charles. AU - Wolf, Philip A.. PY - 2009/5/1. Y1 - 2009/5/1. N2 - Background and Purpose-: Carotid atherosclerosis has been associated with increased risk of stroke and poorer cognitive performance in older adults. The relation of carotid atherosclerosis to cognitive impairment and MRI indices of ischemia and aging in midlife is less clear. Methods-: We studied 1975 Framingham Offspring Study participants free of stroke and dementia with available carotid ultrasound, brain MRI, and neuropsychological testing. We related common and ...
Introduction and objectives The equations used in the general population to calculate cardiovascular risk are not useful in genetic hypercholesterolemia (GH). Carotid plaque detection has proved useful in cardiovascular prediction and risk reclassification but there have been no studies of its usefulness in GH. The aim of this study was to determine the association between the presence of carotid artery plaque and the occurrence of cardiovascular events in patients with GH.. Methods This study included 1778 persons with GH. The mean follow-up until the occurrence of cardiovascular events was 6.26 years. At presentation, the presence of carotid artery plaque was studied by high-resolution ultrasound.. Results Carotid artery plaque was found in 661 (37.2%) patients: 31.9% with familial hypercholesterolemia, 39.8% with familial ...
Carotid artery disease is a disease in which a waxy substance called plaque builds up inside the arteries. You have two carotid arteries, one on each side of the neck which divide into the internal and external carotid arteries. The internal arteries supply blood to the brain and the external arteries supply blood to the face, scalp, and neck... Carotid artery disease is serious because it can cause a stroke if the plaque should build up to the point it cuts off blood supply to the brain, or the plaque ruptures and a blood clot forms in the artery cutting off blood supply to the brain.. Carotid artery disease causes over half the strokes that occur in the United States. Carotid artery ...
When narrowing occurs in the main arteries that flow to the brain, the condition is called "carotid artery disease". This can increase a persons risk of having a stroke, however, most people are unaware that they might have it!. Carotid duplex ultrasound, or an ultrasound of the carotid artery, is a simple and painless test performed in our office that easily detects carotid artery disease.. Treating carotid artery disease is focused on preventing a stroke, or if you have had a stroke, preventing any further strokes. Lifestyle changes are key in this battle. Sometimes medications are needed as well. Surgeries or stenting may be needed in certain people.. Carotid stenting is a minimally invasive procedure for certain appropriate people with ...
This study demonstrates for the first time that expression of a recombinant protein in the adventitia by in vivo adenovirus-mediated gene transfer can result in a biological effect. Our results indicate that delivery of adenoviral vectors encoding the β-galactosidase and eNOS genes to the periarterial sheath of rabbit carotid arteries results in adventitia-specific gene transfer and expression. Expression of recombinant eNOS in the adventitia resulted in marked increase in calcium-dependent NOS activity, an elevation of cGMP levels, and a diminished sensitivity to phenylephrine. Furthermore, the recombinant eNOS is responsive to stimulation by calcium ionophore and acetylcholine, as manifested by enhanced relaxations to these agents.. Gene transfer to the adventitia by adenoviral vectors has been demonstrated by Rios and coworkers9 in monkey femoral and carotid arteries. We obtained similar adventitia-specific gene transfer in rabbit ...
[103 Pages Report] Check for Discount on United States Radial Artery Compression Devices Market Report 2017 report by QYResearch Group. In this report, the United States Radial Artery Compression Devices...
TY - JOUR. T1 - Near-continuous, noninvasive blood pressure monitoring in the out-of-hospital setting. AU - Thomas, Stephen H.. AU - Winsor, Greg. AU - Pang, Peter. AU - Wedel, Suzanne K.. AU - Parry, Blair. PY - 2005/1. Y1 - 2005/1. N2 - Objectives. This study was conducted to test out-of-hospital performance of a noninvasive radial artery tonometry device to assess blood pressure (BP), providing readings every 10-12 seconds. The primary objective was to determine the correlation between noninvasive BPs calculated with radial artery tonometry and standard oscillometric cuff methods. The secondary objective was to determine whether the difference observed between the two techniques was consistent over the range of BPs measured. Methods. This prospective trial enrolled adults transported by helicopter (n = 9 patients), fixed-wing airplane (n = 1), or ground vehicle (n = 10) of a single transport service. Patients had BP assessed simultaneously, by both standard automatic cuff ...
BACKGROUND Low plasma concentrations of high-density lipoprotein (HDL) are associated with increased risk of cardiovascular disease. However, recently several studies have questioned the protective role of high plasma HDL levels. OBJECTIVE This study was designed to evaluate HDL functions in women with high plasma HDL cholesterol and very low risk profile with relation to subclinical carotid atherosclerosis (ATS). METHODS Included were 158 middle-aged women with plasma HDL |60 mg/dL and Framingham risk score |7% who had B-mode ultrasound of the carotid arteries. Subclinical ATS was determined by the presence of plaques and/or intima-media thickness (IMT) |1.0 mm. RESULTS ATS was observed in 51 women, with the majority (n=41) having carotid plaques, some with advanced morphology. In a multivariable model analysis, each, HDL or age, were independently associated with increased prevalence of ATS. Odds ...
A 52 year old man presented with severe myocardial ischaemia 10 days after a Q wave infarction treated with thrombolysis. Coronary angiography revealed severe three vessel disease of the heart with a tight stenosis of the left anterior descending artery and first diagonal branch, and occlusion of the marginal and right coronary arteries. The patient underwent revascularisation using the arterial sling operation, during which the right and left internal mammary arteries were harvested without transection of their proximal end together with a segment of the left radial artery. The radial artery segment (RAD) was anastomosed to the right internal mammary artery (RIMA) and used to revascularise branches from both the right and circumflex arteries (below left). Then the left internal mammary artery (LIMA) was anastomosed to the left anterior descending artery and ...
Childhood obesity is a major health problem throughout the world. Obese children are more likely to become obese adults in whom one can expect a higher rate of hospitalisation, interventions and premature death.1 In obese people, coronary heart disease generally manifests in middle age or later life. However, atherosclerosis has its roots in childhood, its first signs in obese children appearing before puberty; therefore, it is important to develop efficient strategies to reduce the incidence of cardiovascular disease (CVD) in the population. Carotid artery intima-media thickness (CIMT) serves as a marker of preclinical atherosclerosis.2. CVD develops as a result of arterial damage in the form of arteriosclerosis. Arteriosclerosis is a general term for conditions in which diffuse thickening and stiffening in mainly large- and medium-sized arteries develop under different conditions. Both the media and intima of the arteries could be involved in the ...
OBJECTIVE: The purpose of this study was to examine the association between adiposity measures, ultrasound image quality, and preclinical markers of atherosclerosis in young adults. METHODS: B-mode ultrasound was used to obtain common carotid intima-media thickness and common carotid artery distensibility of 2265 and 1313 adults aged 24 to 39 years in two population-based studies: the Cardiovascular Risk in Young Finns and Childhood Determinants of Adult Health studies. Qualitative assessments of ultrasound image quality were obtained from each study (scored as 1, excellent; 2, average; and 3, poor) based on the ability to detect arterial interfaces and the amount of noise present in the image. RESULTS: Increased adiposity was associated with significantly increased odds (all P | .05) of average or poor carotid ultrasound image quality. Reduced image quality was associated with lower ...
Carotid artery - What are the carotid arteries? Carotic Arteries. The human carotid arteries supply the head and the neck with oxygenated blood. The left common carotid artery originates from the aorta and the right common carotid originates from the brachiocephalic artery which originates from the aorta. The carotic artery divides in the neck to form the internal and external carotic arteries.
Results-During an average follow-up of 15.7 years, 82 incident hemorrhagic and 621 incident ischemic strokes (131 lacunar, 358 nonlacunar, and 132 cardioembolic strokes) occurred. The incidence rates of hemorrhagic and ischemic strokes were greater across higher carotid intima-media thickness levels. Although this positive association was observed for all stroke subtypes, the age-, gender-, and race-adjusted risk ratios were higher for cardioembolic and nonlacunar strokes than for hemorrhagic and lacunar strokes. Compared with participants in the lowest quintile (,0.61 mm), the adjusted risk ratios for those in the highest quintile (≥0.85 mm) of intima-media thickness were 2.55 (95% CI, 1.09-5.94) for hemorrhagic, 2.89 (95% CI, 1.50-5.54) for lacunar, 3.61 (95% CI, 2.33-5.99) for nonlacunar, and 6.12 (95% CI, 2.71-13.9) for cardioembolic stroke. The risk ratios were attenuated by additional adjustment for covariates but remained statistically significant for nonlacunar and ...
Objective: To evaluate our experience with the radial artery in coronary artery bypass grafting. Methods: We studied 156 consecutive patients who had a single radial artery as coronary grafts. All patients underwent a modified Aliens test. Radial artery were harvested by no touch technique. Results: An average of 3.3 grafts perpatient were performed. Operative mortality occurred in 1 (0.6%) patients, no stroke, deep sternal infection and fingertip ischemia. Reoperation for hemorrhage in 2 (1.3%), and myocardial ischemia in 1 (0.6%). Conclusion: Good early clinical results can be achieved by using the radial artery in coronary artery bypass grafting.
Methods and Results: To identify cIMT-associated genes and genetic variants, a discovery analysis using the Illumina 200K CardioMetabochip was conducted in 3430 subjects with detailed ultrasonographic determinations of cIMT from the IMPROVE (Carotid Intima Media Thickness [IMT] and IMT-Progression as Predictors of Vascular Events in a High Risk European Population) study. Segment-specific IMT measurements of common carotid, bifurcation, and internal carotid arteries, and composite IMT variables considering the whole carotid tree (IMTmean, IMTmax, and IMTmean-max), were analyzed. A replication stage investigating 42 single-nucleotide polymorphisms for association with common carotid IMT was undertaken in 5 independent European cohorts (total n=11 590). A locus on chromosome 16 (lead single-nucleotide ...
Objective: Erectile dysfunction (ED) may be a sign of generalized vascular disease. Intima-media thickness (IMT) and aortic stiffness are markers and prognosticators of cardiovascular risk. The association between ED and measures of IMT and aortic stiffness has not been investigated.. Methods: A total of 95 men with ED (detected with a validated questionnaire) were studied: 36 men (62±9 yrs) with coronary artery disease (CAD) and 59 men (59±11 yrs) without CAD. Mean IMT of the common carotid arteries, carotid-femoral pulse wave velocity (PWV) as an index of aortic stiffness and pharmacologically stimulated peak systolic velocity (PSV) of cavernous arteries were used to assess vascular damage.. Results: Patients with CAD had decreased PSV (27.2 vs 33.8 cm/s, p=0.01), increased IMT (0.98 vs 0.82, p,0.001) and increased PWV (8.9 vs 8.2 m/s, p,0.01) compared with men without CAD. PSV was inversely correlated with age (r= −0.24, ...
For over a decade there has been accumulating evidence that the use of more than a single arterial graft during coronary artery bypass grafting can improve clinical outcomes. However the vast majority of patients in most developed countries still only receive a single arterial conduit even in the presence of multivessel coronary artery disease. This review summarizes the current evidence for the use of a second internal mammary artery and/or radial artery graft. While in comparison to vein grafts the superior patency of internal mammary artery grafts is well established, there now exists strong and consistent evidence of the superior patency of radial arteries over the longer term. Likewise, there is a rapidly growing body of evidence that the superior patency of both these arteries in comparison to vein grafts translates into improved clinical outcomes.
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BACKGROUND: Standard coronary artery bypass graft surgery uses a single internal mammary artery and supplemental vein or radial artery grafts. Several observational studies have suggested a survival benefit with two internal mammary artery grafts compared to a single internal mammary artery graft, but this has not been tested in a randomised trial. The Arterial Revascularisation Trial is a Medical Research Council and British Heart Foundation funded, multi-centre international trial comparing single internal mammary artery grafting versus bilateral internal mammary artery grafting. METHODS/DESIGN: Twenty centres in the UK, Australia, Poland and Brazil are planning to randomise 3000 coronary artery bypass graft surgery patients to single or bilateral internal mammary ...
Arterial blood collection devices market information, by type (blood collection tubes, lancet, needles, vacuum blood collection system, microfluidic system, others), by application (arterial blood gas sampling, intraoperative blood salvage), and by end users (hospitals & clinics, blood banks, laboratories, others) - Global forecast till 2023. Introduction:. Arterial blood collection devices are used to collect blood samples from the artery which is used of arterial gas sampling. The most common site for arterial puncture is the radial artery at the wrist.Femoral and radial artery puncture is most commonly performed to obtain arterial blood sampling for gas analysis. Pulmonary function can be assessed with the help of partial pressure of oxygen and carbon dioxide. Before performing arterial puncture, it is important to check the patency of ulnar artery. This can be examined by performing Allen test. A Positive Allen Test indicates normal ...
TY - JOUR. T1 - Microanatomical and immunohistochemical study of the human radial nerve at the antecubital fossa. AU - Chakravarthy Marx, S.. AU - Kumar, Pramod. AU - Dhalapathy, S.. AU - Prasad, Keerthana. AU - Anitha Marx, C.. PY - 2009/6/26. Y1 - 2009/6/26. N2 - Background: Poor prognosis of radial nerve repair in elderly patients may be due to changes in intraneural anatomy with age. Also, chances of Complex Regional Pain Syndrome-Type I (CRPS-I) following radial nerve injury are comparatively high. The present study is to find the fascicular pattern of radial nerve (at antecubital fossa), microanatomic morphometric characteristics of its connective tissue components and changes with age and study of intraneural sympathetic fiber content. Methods: Twenty human (21-87 years) cadaveric radial nerves have been collected from antecubital fossa and the study has been performed at magnifications (10×, 20× and 40× objective) after routine histological (hematoxylin & eosin stain) processing was ...
The assessment of adequate ulnar collateral supply to the hand is mandatory prior to the harvest of the radial artery as a conduit for coronary artery bypass grafting. However, there is currently no one test which is widely used in all centres. We report a new and objective method of assessing ulnar collateral supply to the hand prior to harvest of the radial artery. This technique involves assessing the presence of a hyperaemic flow response to occlusion of the radial artery using an intraoperative transit time flowmeter. We found this technique to be objective and reliable, and would advocate its use in patients with a positive Allens test ...
Introduction: The transradial approach for coronary angiography and percutaneous intervention is increasingly used due to a lower incidence of vascular complications, patient preference and a potential mortality benefit in patients with acute coronary syndromes. While the utility is debated, competency of the collateral circulation to the hand is routinely assessed prior to radial access with the modified Allens test (MAT). Smartphone technology allows assessment of circulation using dedicated applications. We assessed the hypothesis that a smartphone heart rate monitoring application (HRMA) would provide superior diagnostic accuracy over the MAT in assessing ulnar artery patency.. Methods: This study was a prospective randomized trial conducted in a single academic hospital. The participants arterial patency was assessed with three modalities: the MAT, the HRMA, and Doppler ultrasound imaging (DUS). Study subjects were randomly assigned via a computer generated algorithm to receive either ...
Introduction: While nitroglycerin (NTG) is often used in the treatment of CHF it is not formally approved for that purpose. Whether addition of low dose NTG is of value in patients already on guideline-based therapy (ACE inhibitors, beta-blockers, diuretics) is not known, nor is it known whether response to NTG added to these medicines varies with severity of left ventricular dysfunction.. Methods: Exercise capacity by six-minute walk test (6MWT), quality of life by the Minnesota Living with Heart Failure Questionnaire (HFQ), and ejection duration (ED) by Sphygmocor© were measured at baseline and after a 4 week course of transdermal NTG, given at 0.2 mg/hr for 12 hours daily. We studied 45 NYHA Class II and III patients (84% male, 53.4 ± 9.1 yrs, 42% with CAD, CHF duration 3 ± 2.6 yrs, LVEF ≤40%) on stable, standard, guideline-based CHF therapy. ED was defined in msec from the foot to the incisura of the applanation tonometry derived radial artery pressure waveform.. Results: Subjects were ...
Two methods are described here using the radial artery, the most common site because of low complication rates. Methods can be adapted to other arteries. Another common site is the posterior tibial artery, as both the radial and posterior tibial arteries have good collateral circulation. Ulnar (to be used only in the absence of previous radial artery puncture attempt) and dorsalis pedis arteries are alternative sites. The temporal, brachial, and femoral arteries are not recommended. Axillary artery cannulation is very difficult and also not recommended. Temporal artery catheterization may have adverse neurologic sequelae. The brachial artery does not have good collateral flow and can have a lot of complications. Lateral or posterior wrist transillumination or Doppler/real-time ultrasound may be helpful in locating the artery in premature infants. Arterial catheterization requires patience ...
A 50-year-old man who had coronary artery bypass grafting (LITA-LAD, RA-RCA, SVG-OM-PL) 6 years previously was admitted with acute dissection of the aorta (DeBakey type T). Preoperative computed tomography showed that all coronary bypass grafts were patent. We replaced the graft of the ascending aorta and reconstructed the coronary artery bypass by re-sternotomy, circulatory arrest (rectal temperature: 23.6 ), retrograde cerebral perfusion, and intermittent retrograde cardioplegia. Because a radial artery (RA) graft and a saphenous vein graft (SVG) each had intact orifices, we detached them together and attached the grafts back to the aortic graft wall. He was weaned successfully from cardiopulmonary bypass without difficulty and postoperative transthoracic echocardiography (TTE) showed good left ventricle (LV) function. Postoperative multidetector-row computed tomography (MDCT) showed that the RA graft and SVG were patent. By performing ...
In this study, we measured plasma endotoxin concentrations of blood drawn from the radial artery and the outlet circuit of the PMX column after 24 hours duration of PMX treatment in septic shock patients. The assay for endotoxin was performed with separated plasma from heparinized whole blood samples centrifuged at 3,000 rpm for 40 seconds. The high-sensitivity assay was performed by kinetic turbidimetric Limulus assay using a MT-358 Toxinometer (Wako Pure Chemical Industries, Ltd, Japan). This Limulus assay test is specific to endotoxin and has no cross-reaction to β-glucan. The endotoxin removal rate was defined by the equation: ((radial artery endotoxin concentration - outlet circuit of PMX column endotoxin concentration)/radial artery endotoxin concentration) × 100%. The endotoxin removal rate represents endotoxin adsorption ability. Five patients with septic shock were studied. ...
After Carpentier and coworkers reported the first use of the RA, its use was largely abandoned due to a high occlusion rate at 1-year follow-up secondary to intimal hyperplasia and vasospasm.12 The higher occlusion rates were associated with trauma during harvest, such as mechanical dilation and external manipulation. The vasospastic response of the RA was greater than that of the internal thoracic artery because of a thicker media. Newer harvesting techniques and antispasmotic medications (ie, calcium channel blockers) were found to be effective in preventing postoperative vasoconstriction and increased long-term patency.. Today, the debate continues about the optimal secondary conduit for CABG after LITA-to-LAD grafts. Trends in multiple arterial grafting have led to renewed enthusiasm for the RA as a secondary CABG conduit, although the RITA has also garnered similar interest.13-14 The RA can be used as a free graft or a composite graft. It is an arterial graft with ...
slow onset wrist pain in flexion/radial deviation. Woke up with severe popping and bone movement (scaphoid) with pain as though a ligament is out of place. No pain on passive radial deviation but pain ...
The Allens test checks to make sure that radial and ulnar arteries that supply blood to the hand are not blocked. A pulse oximeter is placed on the index finger of the hand. The subject is asked to make a fist for 10 seconds.At this time, pressure is applied over the ulnar and radial arteries as to occlude (block) both of them. The pulse oximeter reading will begin to fall. Radial arterial pressure is then released. If the artery is patent (working), the pulse oximeter reading will begin to rise ...
Apparatus for performing subselective arteriography or angioplasty on an internal mammary artery or graft which avoids dissection or stenosis of the internal mammary artery or graft. A catheter having a balloon and a proximal port delivers an angiographic dye or a device for treating vascular obstructions to the internal mammary artery or graft from a stable position within the subclavian artery. Method for injecting angiographic dye into an internal mammary artery or graft. A catheter having and a balloon and a proximal port is inserted over a guide wire into a subclavian artery and inflated at a point distal to the junction of the subclavian artery and the internal mammary artery or graft. An angiographic dye is delivered through the proximal port and flows into the ...
This is a phase III, single-center, prospective, randomized trial that will compare resource utilization, clinical outcomes and patient satisfaction between radial and femoral access for patients with prior coronary artery bypass graft (CABG)surgery undergoing coronary and graft angiography and intervention. During clinically-indicated coronary angiography of patients with prior CABG, the amount resources used, radiation exposure to patients and operators, occurence of complications and patients satisfaction will be compared between the two treatment arms to determine whether compared to femoral approach radial access will result in:. ...
INTRODUCTION: Increased aortic stiffness is correlated with many clinically adverse cardiovascular outcomes. The "gold standard" quantitative index for arterial stiffness is the pulse wave velocity (PWV). We have developed a new method called the Intrinsic Frequency (IF), which views the arterial pressure waveform as a piecewise combination of two coupled systems, the heart and arterial system which are decoupled upon closure of the aortic valve. Each of these dynamical systems has an inherent frequency of operation (ω1 and ω2) which gives information about LV function (ω1) as well as arterial dynamics (ω2).. METHODS: IF methodology is based on Sparse Time-Frequency Representation method. It uses an effective L2-minimization to extract the second intrinsic frequency (ω2) from an aortic pressure waveform. To examine the clinical relevance of this method, IF was applied to aortic pressure waveforms taken from published works. These aortic waveforms were selected from a healthy population free ...
Pain levels measured by VAS were found to be similar between the two groups during sheath insertion (VAS: AO: 4.84 ± 1.0 vs 4.82 ± 1.2, P = NS), as well as 30 min after sheath removal (VAS: AO: 0.07 ± 0.5 vs LA: 0.15 ± 0.6, P = NS). The time to obtain radial access was also not affected by the use of anesthetic ointment (AO: 62.24 ± 25.7 s vs LA: 64.04 ± 18.78 sec, P = NS). The rate of clinical or angiographic radial artery spasm was similar (8-10%) between the groups (P = NS) CONCLUSION: Use of a local anesthetic ointment, versus injectable lidocaine, in trans-radial cardiac catheterization as means of local anesthesia, was found to be equally effective in terms of pain, artery spasm, or artery cannulation speed.. © 2017, Wiley Periodicals, Inc.. ...
The RIFLE-STEACS trial was performed at 4 Italian centers from 2009 to 2011 (5). Compared with RIVAL, patients in the RIFLE-STEACS study were at higher baseline risk because the investigators included patients with symptom duration up to 24 h as well as patients presenting with cardiogenic shock. To date, this randomized trial is the only one that has included such a complex population. This was possible because informed consent could be given by family members or relatives. Ultimately, 10% of patients presented in Killip III/IV class and 8% required intra-aortic balloon pump during procedures. Importantly, the RIFLE-STEACS trial was more of a primary PCI trial (99% PCI), whereas RIVAL was more of a STEMI trial (,75% primary PCI). More patients received ,300 mg of a clopidogrel loading dose prior to PCI, and platelet glycoprotein IIb/IIIa inhibitors were used in 69% of the RIFLE-STEACS patients versus ,35% in RIVAL STEMI patients. Bivalirudin was rarely used in the RIVAL trial and in ,10% of the ...
The SphygmoCor® CP System The SphygmoCor CP system includes pulse wave analysis (PWA) software only. During a PWA measurement, a 10-second snapshot of the radial arterial pressure wave is measured using a tonometer. The SphygmoCor software derives the ascending aortic pressure wave, substantially equivalent to the pressure wave measured by an invasive catheter. From the aortic pressure wave, a number of valuable cardiovascular measurements are determined, including central aortic systolic pressure, aortic augmentation index and central pulse pressure ...
AtCor Medical lead the world in the field of arterial pulse wave analysis and velocity systems. The SphygmoCor range provide tools for non-invasive assessment of the cardiovascular system and autonomic function.. Sphygmocor technology is based on a transfer function that derives the pressure wave at the ascending aorta. This transfer function is a patented algorithm of the properties of the brachial artery, providing important central data from a non-invasive recording of the pressure wave at the radial artery. SphygmoCor allows the physician to assess the cardiovascular state of the patient, where it really matters - at the heart. ...
The World Arterial Blood Collection Devices Market report on the basis of end user, the arterial blood collection devices market is segmented into hospitals & clinics, laboratories, blood banks and others. Arterial blood collection devices are used to collect blood samples from the artery which is used of arterial gas sampling. The Global Arterial Blood Collection Devices Market professional and depth research report that displays the worlds major regional market conditions of Arterial Blood Collection Devices industry, the main region including North American, Europe and Asia etc.. The most common site for arterial puncture is the radial artery at the wrist. Other sites for arterial puncture include brachial artery, femoral artery, and dorsalis pedis artery. Femoral and radial artery puncture is commonly performed to obtain arterial blood sampling for gas analysis. In arterial blood sampling, devices for ...
The Republican Party has left its core principles to rot by the side of the road, so we are starting our very own American Conservative Party. Please feel free to join. We could use all CONSERVATIVE thoughts and discussions. Sorry, we are not a big tent. We have principles that will not be compromised. If you would like to belong to a party who means what they say and says what they mean (as long as you agree with those principles, of course), then this is the party for you. Thanks ...
The present invention is a method for using an improved guiding catheter that eliminates the need for an introducer sheath or a separate Tuohy-Borst Y adaptor, thus reducing the time and expense for performing artery opening procedures. Furthermore, the guiding catheter with straightening dilator as described herein allows the hole in the wall of the femoral artery in the groin, or even more advantageously, the radial artery in the arm to be approximately 2 French sizes smaller in diameter as compared to the hole that would be created if an introducer sheath is also used. The advantages of the present invention are accomplished by utilizing a guiding catheter with a dilator that has a stiffened and/or curved distal section that can be used to straighten the distal section of the guiding catheter as it is advanced through the arterial system. The guiding catheter plus dilator can then be used in a manner similar to an introducer sheath to percutaneously enter ...
Arterial stiffness is an important risk factor for cardiovascular events. Radial augmentation index (AI r ) can be more conveniently measured compared with carotid-femoral pulse wave velocity (cfPWV). However, the performance of AI r in assessing arterial stiffness is limited. This study proposes a novel index AI rd , a combination of AI r and diastolic augmentation index (AI d ) with a weight α, to achieve better performance over AI r in assessing arterial stiffness. 120 subjects (43 ± 21 years old) were enrolled. The best-fit α is determined by the best correlation coefficient between AI rd and cfPWV. The performance of the method was tested using the 12-fold cross validation method. AI rd (r = 0.68, P , 0.001) shows a stronger correlation with cfPWV and a narrower prediction interval than AI r (r = 0.61, P , 0.001), AI d (r = −0.17, P = 0.06), the central augmentation index (AI c ) (r = 0.61, P , 0.001) or AI c normalized for heart rate of 75 bpm (r = 0.65, P , 0.001). ...
A distributing artery (or muscular artery) is a medium-sized artery that draws blood from an elastic artery and branch into "resistance vessels" including small arteries and arterioles. In contrast to the mechanism elastic arteries use to store energy generated by the hearts contraction, distributing arteries contain layers of smooth muscle. Under the microscope distributing arteries can be identified by their clearly defined internal elastic lamina. In constricted vessels the elastic lamina of distributing arteries appears thick and kinky. The elastic lamina is best visualized using Verhoeffs stain, but can be easily detected in specimens stained using other techniques as a well-defined negative staining region. Examples of distributing arteries include the radial artery and the splenic artery. Distributing arteries along with elastic arteries are common site for atherosclerosis.[citation ...
Endothelin receptor antagonists are approved for pulmonary arterial hypertension. Development of selective ETA-receptor antagonists over mixed or dual receptor antagonists has depended on a range of receptor binding assays, second messenger assays and functional blood vessel assays. This study compared the 3 clinically-approved endothelin receptor antagonists in assays of human isolated pulmonary and radial arteries in vitro. METHODS: Human isolated pulmonary (i.d. 5.5mm) and human radial (i.d. 3.23mm) artery ring segments were mounted in organ baths for isometric force measurement. Single concentration-contraction curves to endothelin-1 were constructed in the absence or presence of bosentan (1-10µM), macitentan (0.03-0.3µM) or ambrisentan (0.1-1µM). RESULTS: All 3 endothelin antagonists caused competitive rightward shifts in the endothelin-1 concentration-response curves in both arteries. The Clark plot and analysis gave the following pKB values: bosentan, pulmonary artery ...
This study is the first to analyze the relationship between in vivo measured shear rate and SS and structural and functional properties of a peripheral conduit artery in patients with ESRD. Patients with ESRD were characterized by outward remodeling of BA, with larger inner diameter and increased stiffness. The outward remodeling was not associated with higher blood flow but with an acceleration of age-associated changes. Whereas BA circumferential wall stress did not differ from that in control subjects, SS was reduced significantly in patients with ESRD as a result of lower shear rate and decreased WBV. Hand warming-induced SS augmentation was associated with FMD and enhanced BAC, which were significantly less pronounced in patients with ESRD, but dilation in response to GTN did not differ in control subjects and patients with ESRD. In patients with ESRD, the partial anemia correction increased SS as a result of enhanced WBV and was associated with an increased FMD and improved BAC.. ...
In hypertension and aging, central elastic arteries become stiffer and hence the central pulse pressure is augmented due to the increase in the pulse wave velocity and the early return of reflected waves to the heart from the periphery. Valuable information on arterial properties, such as stiffness, can be obtained from both central (aortic) and peripheral (radial) pressure wave forms. A feasibility study for the noninvasive estimation of arterial stiffness using pressure waves detected by a pneumatic cuff wrapped around the upper arm is presented. The propagation and reflection of arterial pressure waves (generated by the heart) in the central elastic arteries are simulated using a simplified water hammer acoustic model. Furthermore, a lumped parameter model is used to describe the transmission of the pressure waves from the brachial artery to the cuff external wall. By combining the two models, we were able to simulate the pressure contours in the brachial artery and ...
Definition : Vascular catheters designed to facilitate intravascular access through their lumen to specific vessels (e.g., iliac, carotid, and coronary arteries). These catheters (also known as guiding sheaths) usually consist of a single-lumen tube with an appropriate configuration, stiffness, and tip to access a particular section of the vasculature. Guiding vascular catheters are used to insert other catheters, guide wires, balloons, occlusion devices, and stents, while performing intravascular catheterization procedures (e.g., angioplasty, atherectomy). Dedicated vascular guiding catheters are also used in a variety of intravascular (e.g., peripheral, central venous) introducers and catheterization procedure kits and trays.. Related Terms : "Catheter Introducers, Vascular". Entry Terms : "Radial Artery Guiding Catheters" , "Stenting Guiding Catheters" , "Brachial Artery Guiding Catheters" , "Femoral Artery Guiding ...
... ,Hemostasis following radial artery puncture traditionally involves adhesive bandage and tourniquets. Disadvantages include venous congestion, compression of the ulnar artery and patient discomfort. The RadiStop Radial Compression System is the answer.,medicine,medical supply,medical supplies,medical product
TY - JOUR. T1 - Human internal thoracic artery grafts exhibit severe morphological and functional damage and spasmic vasomotion due to oxidative stress. AU - Kiss, Levente. AU - Benko, Rita. AU - Kovács, Endre. AU - Szerafn, Tamás. AU - Módis, Katalin. AU - Szabó, Csaba. AU - Lacza, Zsombor. PY - 2011/1/1. Y1 - 2011/1/1. N2 - Background: The internal thoracic artery (ITA) is the first choice for myocardial revascularization, but atherosclerotic lesions and perioperative vasospasm may still limit its functionality. Oxidative stress via the peroxynitrite - poly-(ADP-ribose) polymerase (PARP) cascade plays an important role in the pathogenesis of impaired vascular tone via endothelial injury. We aimed to investigate and describe the histology, PARP activation and functionality of ITA grafts and to assess the possible beneficial effect of PARP-inhibition. Material/Methods: ITA specimens from 47 patients (26 men, mean age 66.2±1.7 years) who ...
Objective: Physiological reaction to competitive flow is considered as the primary mechanism of arterial graft occlusion. Reopening of graft lumen had been also reported, but details remain unknown. We sought to delineate the effect of management of the moderately stenotic targets on the occurrence of competitive flow and clinical results. Methods: Clinical records and angiograms of 3263 bypass grafts in 852 patients, who underwent off-pump coronary revascularization using the internal thoracic artery (ITA) and radial artery without aortic manipulation since 2000, were examined. Dominant flow direction was graded as antegrade, competitive, and no flow (occlusion). Late angiography was performed in 157 patients with 561 bypass grafts for clinical reasons. The follow-up period was 55.5 ± 31.1 months. Results: The early graft patency rate was 98.0% (3197/3263). The rate of antegrade flow was 91.5% (2986/3263), while competitive flow was detected in 6.5% ...
BACKGROUND: Continuous non-invasive measurement of finger arterial pressure (FAP) is a reliable technology in adults. FAP is measured with an inflatable cuff around the finger and simultaneously converted to a reconstructed brachial artery pressure waveform (reBAP) by the Nexfin device. We assessed the adequacy of a prototype device (Nexfin-paediatric), designed for a paediatric population, for detecting rapid arterial pressure changes in children during cardiac surgery. METHODS: Thirteen anaesthetized children with a median age of 11 months (2 months-7 yr) undergoing congenital cardiac surgery were included in the study. reBAP and intra-arterial pressure (IAP) were recorded simultaneously during the surgical procedure. To assess the accuracy of reBAP in tracking arterial pressure changes, the four largest IAP variations within a 5 min time interval were identified from each procedure. These variations were compared offline with reBAP during a 10 s control period before and a 10 s period ...
Height and sex is strongly associated with radial augmentation index in Korean patients with never-treated hypertension Kye Taek Ahn, Kwang-In Park, Mi Joo Kim, Jin Kyung Oh, Ji Hye Han, Hee Jin Kwon, Seon-Ah Jin, Jun-Hyung Kim, Jae-Hyeong Park, Jae-Hwan Lee, Si Wan Choi, In-Whan Seong, Jin-Ok Jeong Department of Internal Medicine, Division of Cardiology, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Republic of Korea Objectives: Central hemodynamics may better represent the load imposed on the coronary and cerebral arteries and thereby bear a stronger relationship to cardiovascular outcomes. Methods: Patients who had confirmed hypertension as assessed by daytime 24-hour ambulatory blood pressure monitoring (≥135/85 mmHg) were enrolled. Central blood pressure and radial augmentation index (AIx) corrected for a heart rate of 75 bpm (radial AIx 75) were measured for all patients. We evaluated the association of ...
Background Early changes in the large muscular arteries are already associated with risk factors as hypertension and obesity in adolescence and young adulthood. The present study examines the association between arterial stiffness measurements, pulse wave velocity and augmentation index and lifestyle-related factors, body composition and cardiorespiratory fitness, in young, healthy, Swedish adults. Design This study used a population-based cross-sectional sample. Methods The 834 participants in the study were self-reported healthy, non-smoking, age 18-25 years. Augmentation index and pulse wave velocity were measured with applanation tonometry. Cardiorespiratory fitness was measured by ergometer bike test to estimate maximal oxygen uptake. Body mass index (kg/m2) was calculated and categorised according to classification by the World Health Organisation. Results Young Swedish adults with obesity and low cardiorespiratory fitness have significantly higher pulse wave velocity and augmentation ...
A percutaneous coronary intervention (PCI) is often called balloon angioplasty. A catheter is inserted into the blood vessels either in the groin (femoral artery) or in the arm (radial artery). Using a special type of X-ray called fluoroscopy; the catheter is threaded through the blood vessels into the heart where the coronary artery is narrowed. […]. ...
I am a hobbyist and I have designed a radial turbine device for use in a tidal stream. I have conducted a couple of experiments to demonstrate that there is less mechanical stress in the radial approach as compared to the axial approach but I would like to prove this concept mathematically (at a basic level). I have been able to find references to Eulers equation but (not being an engineer or physicist) am unable to figure out how to use the formula to show the difference. Can someone out there please explain the basic math principles that show why an axial turbine will have more mechanical stresses than a radial turbine ...
The number of PCIs performed around the world continues to increase due to a rising incidence of patients with symptomatic coronary artery disease. Despite an increased interest in performing the procedure via the radial approach, with large-scale clinical trials demonstrating reductions in vascular complications and time to ambulation, the majority of cases involve femoral arterial access. While vascular closure devices (VCDs) facilitate … ...
Elsevier has published the fifth edition of Dr. Morton J. Kerns Cardiac Catheterization Handbook, the leading medical text about cardiac catheterization.. Kern is UC Irvines Associate Chief of Cardiology and is chief of cardiology at the Long Beach Veterans Affairs Hospital.. The book is the leading medical text about cardiac catheterization and includes the latest information about transradial artery catheterization. The technique is considered more comfortable for patients and has fewer complications than the traditional femoral artery approach.. The book also:. ...
The most significant finding from the study is the specific targeting of the ulnar artery in patients with scleroderma. This occurred in an unexpectedly high proportion of patients and in both disease subtypes. The ulnar artery disease was not uniformly bilateral, and although it occurred more commonly in those patients with longer disease duration, this temporal relation did not reach statistical significance. The ulnar artery disease occurred in or before a mean disease duration of approximately two decades. With the possible exception of the anterior and posterior tibial arteries, which seemed to be less commonly calcified in scleroderma patients, all other arteries examined showed similar characteristics and Doppler abnormalities in the two groups.. Ulnar artery abnormalities were documented by ultrasound proximal to the wrist and were described as "smoothly thickened". In the only report of scleroderma ulnar artery ...
is committed to improving the health of patients with kidney and vascular diseases through the development of novel, first-in-class therapeutics. Proteons lead product candidate, vonapanitase, is an investigational drug intended to improve hemodialysis vascular access outcomes. Proteon is currently enrolling patients in PATENCY-2, a Phase 3 clinical trial evaluating vonapanitase in patients with CKD undergoing surgical creation of a radiocephalic arteriovenous fistula for hemodialysis. Proteon is also evaluating vonapanitase in a Phase 1 clinical trial in patients with PAD. For more information, please visit www.proteontx.com.. Cautionary Note Regarding Forward-Looking Statements. This press release contains statements that are, or may be deemed to be, "forward-looking statements" as defined in the Private Securities Litigation Reform Act of 1995. In some cases, these forward-looking statements can be identified by the use of forward-looking terminology, including the terms "estimates," ...
With great interest, we read the carefully performed study by Borlaug et al. (1) on the beneficial effect of sodium nitrite on invasive exercise hemodynamics in patients with heart failure with preserved ejection fraction. We appreciate their findings and suggest a complementary explanation: Although organic nitrates and anorganic nitrites probably have different molecular mechanisms of action, both share a common pathway involving cyclic guanosine monophosphate and, importantly, may have similar hemodynamic actions including reduction of central systolic blood pressure and reduction of arterial wave reflections. Indeed, nitroglycerine has been shown to reduce wave reflections even before the conventional blood pressure measurement had been invented (2), and has been shown to do so without any effect on brachial blood pressure (2). In the recent study by Borlaug et al. (1), central pressures and wave reflections unfortunately were not measured. On the other hand, these esteemed colleagues (3), ...
Nikolić Heitzler, Vjeran and Babić, Zdravko and Miličić, Davor and Bergovec, Mijo and Raguž, Miroslav and Mirat, Jure and Strozzi, Maja and Plazonić, Željko and Giunio, Lovel and Steiner, Robert and Starčević, Boris and Vuković, Ivica (2010) Results of the Croatian Primary Percutaneous Coronary Intervention Network for patients with ST-segment elevation acute myocardial infarction. American Journal of Cardiology, 105 (9). pp. 1261-7. ISSN 0002-9149 Banfić, Ljiljana and Vrkić Kirhmajer, Majda and Vojković, Marina and Strozzi, Maja and Šmalcelj, Anton and Lasić, Zoran (2008) Access site complications following cardiac catheterization assessed by duplex ultrasonography. Collegium antropologicum, 32 (2). pp. 385-390. ISSN 0350-6134 (Print) Bulum, Joško and Banfić, Ljiljana and Strozzi, Maja and Aurer, Igor and Jelašić, Dražen (2007) Primary cardiac lymphoma presenting as atrial flutter and total heart block. Heart and Vessels, 22 (1). pp. 52-54. ISSN 0910-8327 (Print) 1615-2573 ...
An implantable prosthesis for placement in hollow tubular organs is described alongwith an instrument for deploying the said prosthesis. On radial compaction, the prosthesis has a low profile, allowing introduction into the body with a deployment instrument of low calibre. The prosthesis has a longitudinal strut to provide longitudinal support. One or more, outwardly biased, flexible curvilinear members with good shape-memory, symmetrically attached to the leading end of the prosthesis help unroll the prosthesis during deployment. Magnetized wires or powder may be attached to the prosthesis to facilitate this process and provide in addition radial elasticity to the prosthesis. The prosthesis may have tubular extensions to allow the treating lesions that involve the parent tubular organ and its branches. Alternatively, the prosthesis may be provided with apertures which can be widened in vivo. For implantation in branches, the prosthesis may be provided with a flange at its trailing end.
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Soft-tissue deformation can be a problem if a preoperative modality is used to help guide a surgical or interventional procedure. We present a method that can warp a preoperative CT image to represent the intraoperative scene shown by an interventional fluoroscopy image. The method is a novel combination of a 2D-3D image registration algorithm and a deformation algorithm that allows rigid bodies to be incorporated into a nonlinear deformation based on radial basis functions. The 2D-3D registration algorithm is used to obtain information on relative vertebral movements between preoperative and intraoperative images. The deformation algorithm uses this information to warp the preoperative image to represent the intraoperative scene more accurately. Images from an aortic stenting procedure were used. The observed deformation in our experiment was 5 degrees flexion and 5 mm lengthening of the lumbar spine over a distance of four vertebrae. The vertebral positions in the warped CT volume represent ...
This is a report on the first detection of an exoplanet at SFUs Trottier Observatory, based on radial velocity measurements of the host star. Measurements were done using a commercially manufactured, off-the shelf, echelle spectrograph. The report provides an introduction to exoplanet detection and echelle spectrographs, along with a thorough analysis of the measurements. This study provides one example of the many types of advanced spectroscopy projects that can be undertaken by undergraduate students at university teaching observatories.. ...
By Richard R. Heuser, MD, and Khalid Naqi, MD. Patient History. A 65-year-old army veteran presented with unstable angina. An outside angiogram revealed calcific ostial and proximal right coronary artery (RCA) stenoses.. Methods. The radial approach was utilized with an Ikari 1.5 guiding catheter. The lesion was crossed with a Whisper wire and utilizing the FineCross (Terumo) catheter, this was exchanged for the ViperWire (CSI). Following this, the CSI device debulked the proximal areas of stenosis. An AngioScore balloon performed further enlargement of the lumen. Finally, a 3.5 mm x 33 mm stent was placed (Xience). To optimize the ostial result, we placed the Flash ostial device (Cardinal Health). The final result revealed an appropriate apposition at the origin of the RCA vessel. By deploying a few millimeters more proximal, the Flash ostial device allowed us to get the optimal result at the origin of the vessel.. Discussion. Ostial calcific stenosis always poses a challenge during ...
Allen and Farrow engaged in a custody battle after they broke up in January 1992. On August 4, 1992, Allen visited his children at Farrows home by mutual arrangement while she went shopping.[166] According to Mia Farrow, later that day, Dylan Farrow, then aged seven, asked her mother upon her return if "her dad did to her what Woody Allen did to me", stating that she "honestly did not know the answer."[167] Mia Farrow reported this to their pediatrician, who reported the allegations of sexual assault to authorities. Allen was informed of the accusations on August 6. A week later, on August 13, Allen sued for full custody of his biological son, Satchel, and two of Farrows adopted children, Dylan and Moses, with whom Allen had assumed a parental role.[168][164]. In March 1993, the lead doctor of Yale-New Haven Hospital Child Sexual Abuse Clinics investigation into the allegations, Dr Leventhal, gave sworn testimony via a deposition[169] that, in his opinion, Dylan "either invented the story ...
Married to my college sweetheart Shawn for 14 years, we have six children - Jamie (11), Clare (9), Simon (7), Violet (5), Eliza (3), and Cecily (1). Our second child, Clare, was born with a rare genetic condition, Williams syndrome, severe congenital heart defects (pulmonary stenosis and aortic stenosis), a Chiari Malformation, mid-aortic syndrome, and kidney issues. She has undergone one open heart surgery and ten cardiac catheterizations to repair her cardiac and vascular defects and has also undergone a frenulectomy (tongue-tie release) and an angio-embolization of her radial artery to repair an A-V fistula and aneurysm. On May 1, she had her longest surgery yet - a bypass graft of her abdominal aorta, a bypass graft of her SMA vessel, and a kidney re-transplant (kidneys transplanted elsewhere in her body). I began this blog when Clare was an infant to chronicle our life on this new journey into Williams syndrome and raising a child with special needs and a chronic heart ...
Married to my college sweetheart Shawn for 14 years, we have six children - Jamie (11), Clare (9), Simon (7), Violet (5), Eliza (3), and Cecily (1). Our second child, Clare, was born with a rare genetic condition, Williams syndrome, severe congenital heart defects (pulmonary stenosis and aortic stenosis), a Chiari Malformation, mid-aortic syndrome, and kidney issues. She has undergone one open heart surgery and ten cardiac catheterizations to repair her cardiac and vascular defects and has also undergone a frenulectomy (tongue-tie release) and an angio-embolization of her radial artery to repair an A-V fistula and aneurysm. On May 1, she had her longest surgery yet - a bypass graft of her abdominal aorta, a bypass graft of her SMA vessel, and a kidney re-transplant (kidneys transplanted elsewhere in her body). I began this blog when Clare was an infant to chronicle our life on this new journey into Williams syndrome and raising a child with special needs and a chronic heart ...
Patient History: A 56-year-old male patient fell six feet from a diesel truck onto his left heel and left elbow. Radiographic evaluation showed that the patient sustained closed ipsalateral fractures of the left heel and left radial head.. ...
As a first step toward development of a multiaxial failure criterion for human trabecular bone, the Tsai-Wu quadratic failure criterion was modified as a function of apparent density and applied to bovine tibial trabecular bone. Previous data from uniaxial compressive, tensile, and torsion tests (n = 139 total) were combined with those from new triaxial tests (n = 17) to calibrate and then verify the criterion. Combinations of axial compression and radial pressure were used to produce the triaxial compressive stress states. All tests were performed with minimal end artifacts in the principal material coordinate system of the trabecular network. Results indicated that the stress interaction term F12 exhibited a strong nonlinear dependence on apparent density (r2 , 0.99), ranging from −0.126 MPa−2 at low densities (0.29 g/cm3 ) to 0.005 MPa−2 at high densities (0.63 g/cm3 ). After calibration and when used to predict behavior of new specimens without any curve-fitting, the Tsai-Wu criterion ...
The internal thoracic arteries branch from the (blank) arteries. The left of these arteries is a branch of the (blank) artery whereas the right of these arteries is a branch of the (blank) artery. There is a conditional known as coarctation of the aorta. The aorta becomes occluded at a location distal to the parent arteries of the internal thoracic arteries and proximal to the branching of the posterior intercostal arteries. Thus, there is blood flow in the normal direction within the internal thoracic arteries. Despite near total occlusion of the aorta proximal to the branching of the posterior intercostals from the descending aorta, the descending aorta fills with blood and there is blood flow to the entire body. Explain the pattern of blood flow in the case of coarctation of the aorta. Where is the normal direction of flow reversed? Where is blood pressure apt to be elevated and where is it apt to be lowered? What ...
Computed tomography (CT) provides high, isotropic spatial resolution and has become firmly established in pre-procedural imaging for structural heart disease interventions. It allows determination of the exact dimensions of the target structure, provides information regarding the access route and permits identification of fluoroscopic projection angles to provide optimal visualisation for device placement. Several software solutions are available and have been systematically evaluated in the context of transcatheter aortic valve implantation (TAVI). The use of software products to perform automated measurements can be useful, especially when the experience and expertise regarding evaluation of CT in the context of structural heart disease are limited. In scientific studies, software has been demonstrated to provide accurate support for annulus sizing and prosthesis selection, to aid in reliably identifying patients in whom a transfemoral access may be problematic, and to suggest suitable ...

Anomalies, aneurysm and histology of the middle cerebral artery in Nigerian Africans/Anomalias, aneurisma e histologia de la...Anomalies, aneurysm and histology of the middle cerebral artery in Nigerian Africans/Anomalias, aneurisma e histologia de la...

... aneurisma e histologia de la arteria cerebral media en Africanos Nigerianos. by International Journal of Morphology; ... aneurysm and histology of the middle cerebral artery in Nigerian Africans/Anomalias, ... There was no duplicate MCA arising from the internal carotid artery. There was also no aneurysm. Histological review of the MCA ... Based on similar microscopic features of cerebral vascular bifurcation and trunk in our population with the Caucasians, the ...
more infohttps://www.thefreelibrary.com/Anomalies%2C+aneurysm+and+histology+of+the+middle+cerebral+artery+in+...-a0204075238

Cerebral Aneurysm - Trip DatabaseCerebral Aneurysm - Trip Database

Helping you find trustworthy answers on Cerebral Aneurysm , Latest evidence made easy ... Find all the evidence you need on Cerebral Aneurysm via the Trip Database. ... middle cerebral artery in three cases, internal carotid artery bifurcation in two cases, posterior communicating segment of ... A repeat angiography demonstrated an eight mm aneurysm of the internal carotid artery bifurcation, a region clearly normal in ...
more infohttps://www.tripdatabase.com/search?criteria=Cerebral+Aneurysm&page=267

Cerebral aneurysms in childhood and adolescence in: Journal of Neurosurgery Volume 70 Issue 3 (1989)Cerebral aneurysms in childhood and adolescence in: Journal of Neurosurgery Volume 70 Issue 3 (1989)

Angiogram demonstrating a giant aneurysm of the internal carotid artery extending from the sphenoid sinus to the bifurcation. ... Campbell GJRoach MR: Fenestrations in the internal elastic lamina at bifurcations of human cerebral arteries. Stroke 12:489-496 ... Right: Angiogram obtained after the carotid aneurysm was treated by cervical internal carotid artery ligation. Protection of ... Right: Angiogram obtained after the carotid aneurysm was treated by cervical internal carotid artery ligation. Protection of ...
more infohttps://thejns.org/abstract/journals/j-neurosurg/70/3/article-p420.xml?rskey=NZKG6E&

Horners Syndrome Caused by Internal Carotid  Artery Collapse after Clipping of an Internal Carotid-Posterior Cerebral Artery...Horner's Syndrome Caused by Internal Carotid Artery Collapse after Clipping of an Internal Carotid-Posterior Cerebral Artery...

Horners Syndrome Caused by Internal Carotid Artery Collapse after Clipping of an Internal Carotid-Posterior Cerebral Artery ... Aneurysm., Chuman Hideki, Nao-i Nobuhisa, Tamura Koich ... The optic tract is located near a bifurcation of IC-PC [1]. ... Syndrome Caused by Internal Carotid Artery Collapse after Clipping of an Internal Carotid-Posterior Cerebral Artery Aneurysm.. ... Horners syndrome, internal carotid-posterior cerebral artery aneurysm, aneurysmal clipping.. Case report. A 59-year-old woman ...
more infohttp://www.alliedacademies.org/articles/horners-syndrome-caused-by-internal-carotid--artery-collapse-after-clipping-of-an-internal-carotidposterior-cerebral-artery-aneury-8274.html

Ruptured internal carotid artery bifurcation aneurysm presenting with only intracerebral hemorrhage without subarachnoid...Ruptured internal carotid artery bifurcation aneurysm presenting with only intracerebral hemorrhage without subarachnoid...

... resonance angiography demonstrated a cerebral aneurysm originating from the bifurcation of the left internal carotid artery, ... Ruptured internal carotid artery bifurcation aneurysm presenting with only intracerebral hemorrhage without subarachnoid ... Previous Document: Posttraumatic carotid-cavernous fistulae treated by internal carotid artery trapping and high-flow b.... ... Although ICH without SAH is a rare presentation of cerebral aneurysm, ruptured cerebral aneurysm should be considered as a ...
more infohttp://www.biomedsearch.com/nih/Ruptured-internal-carotid-artery-bifurcation/21358153.html

Impact of Methamphetamine Abuse: A Rare Case of Rapid Cerebral Aneurysm Growth with Review of LiteratureImpact of Methamphetamine Abuse: A Rare Case of Rapid Cerebral Aneurysm Growth with Review of Literature

H.-J. Chen, C.-L. Liang, K. Lu, and C.-C. Lui, "Rapidly growing internal carotid artery aneurysm after amphetamine abuse: Case ... a fusiform dilation aneurysm at the pericallosal and callosomarginal bifurcation, and a basilar tip aneurysm, approximately 1.5 ... Additionally, three neoaneurysms that were found include a periophthalmic aneurysm of the right internal carotid artery, ... CT-A demonstrated a left distal anterior cerebral artery aneurysm measuring 3.7 × 3.4 mm pointing in a superior-medial ...
more infohttps://www.hindawi.com/journals/crinm/2018/1879329/

CiNii Articles - YOSHIMOTO TakashiCiNii Articles - YOSHIMOTO Takashi

Surgery for the Internal Carotid Artery Bifurcation Aneurysm (2001) * 7. Takashi YOSHIMOTO ID: 9000348708067 ... Balloon Occlusion Test in Surgery for Cerebral Aneurysms Using Bypass and Parent Artery Occlusion : Special Reference to EC-IC ... A Histopathological Study of Patients Dying from Cerebral Vasospasm after Rupture of Cerebral Aneurysm (1978) ... Clinical Management of Asymptomatic Unruptured Cerebral Aneurysms(,Topics,therapeutic Strategy for Unruptured Cerebral ...
more infohttps://ci.nii.ac.jp/author?q=YOSHIMOTO+Takashi

Two indices affecting the directions of the sylvian fissure dissection in middle cerebral artery bifurcation aneurysms.Two indices affecting the directions of the sylvian fissure dissection in middle cerebral artery bifurcation aneurysms.

... bifurcation aneurysms. We reviewed data of 36 consecutive patients with ... methods for deciding the appropriate direction of the sylvian fissure dissection during surgical clipping in middle cerebral ... line to the internal carotid artery bifurcation and extending from the LS line to the MCA bifurcation was 1.00 ± 0.42 mm in ... bifurcation aneurysms.. METHODS: We reviewed data of 36 consecutive patients with MCA bifurcation aneurysms. We measured 2 ...
more infohttp://www.biomedsearch.com/nih/Two-indices-affecting-directions-sylvian/24167795.html

Visualization of Hemodynamics in a Silicon Aneurysm Model Using Time-Resolved, 3D, Phase-Contrast MRI | American Journal of...Visualization of Hemodynamics in a Silicon Aneurysm Model Using Time-Resolved, 3D, Phase-Contrast MRI | American Journal of...

... of the right internal carotid artery reveals that the blood flow moves through the M1 segment of right middle cerebral artery ( ... hemodynamics of this middle cerebral artery bifurcation aneurysm were the following (Figs 2 and 3): Blood flow from the M1 ... Magnitude and role of wall shear stress on cerebral aneurysm: computational fluid dynamic study of 20 middle cerebral artery ... The aspect ratio (defined as depth/neck width)5,6 of the aneurysm was 4.8. This 3D dataset of the right internal carotid ...
more infohttp://www.ajnr.org/content/27/5/1119

Confirmation of blood flow in perforating arteries using fluorescein cerebral angiography during aneurysm surgery in: Journal...Confirmation of blood flow in perforating arteries using fluorescein cerebral angiography during aneurysm surgery in: Journal...

Aneurysms were located in the internal carotid artery in 12 patients, middle cerebral artery in six, anterior cerebral artery ... basilar artery bifurcation in one, and junction of the vertebral artery (VA) and posterior inferior cerebellar artery in one. ... basilar artery; ICA = internal carotid artery; LED = light-emitting diode; LSA = lenticulostriate artery; MACC = median artery ... Suzuki KSasaki TKodama NLarge aneurysm of the internal carotid artery obliterated with seven fenestrated clips under intra- ...
more infohttps://thejns.org/abstract/journals/j-neurosurg/107/1/article-p68.xml?rskey=XfIHnH&result=8

Hemodynamic Differences Between Unruptured and Ruptured Intracranial Aneurysms During Observation | StrokeHemodynamic Differences Between Unruptured and Ruptured Intracranial Aneurysms During Observation | Stroke

Fifty side-wall internal carotid posterior communicating artery aneurysms and 50 middle cerebral artery bifurcation aneurysms ... During follow-up observation, 6 internal carotid posterior communicating artery and 7 middle cerebral artery aneurysms ruptured ... a significant difference was noted in both internal carotid artery (P=0.0046) and middle cerebral artery (P,0.001) aneurysms. ... stress between aneurysms that ruptured and those that remained unruptured was noted only in internal carotid artery aneurysms ( ...
more infohttp://stroke.ahajournals.org/content/early/2012/02/23/STROKEAHA.111.640995

Involvement of internal elastic lamina in development of induced cerebral aneurysms in rats. | StrokeInvolvement of internal elastic lamina in development of induced cerebral aneurysms in rats. | Stroke

... the bifurcation of the anterior cerebral artery and olfactory artery was histologically studied in control and experimental ... rats treated with unilateral carotid ligation and renal hypertension. Various stages of aneurysm formation were compared, and ... Involvement of internal elastic lamina in development of induced cerebral aneurysms in rats.. C Kim, H Kikuchi, N Hashimoto, M ... Involvement of internal elastic lamina in development of induced cerebral aneurysms in rats. ...
more infohttp://stroke.ahajournals.org/content/19/4/507

Detection of intracranial aneurysms with unenhanced and echo contrast enhanced transcranial power Doppler | Journal of...Detection of intracranial aneurysms with unenhanced and echo contrast enhanced transcranial power Doppler | Journal of...

The internal carotid artery and anterior and posterior communicating artery aneurysms attracted an intermediate level of ... posterior communicating artery; PCA=posterior cerebral artery; ACA=anterior cerebral artery; MCA=middle cerebral artery. ... as vessels at the bifurcation can either imitate or mask an aneurysm. However, a high percentage of basilar tip aneurysms were ... Despite the superficial location of middle cerebral artery aneurysms, a relatively low number were detected. This is, in part, ...
more infohttp://jnnp.bmj.com/content/68/4/489

Books - Lane Medical Library - Stanford University School of MedicineBooks - Lane Medical Library - Stanford University School of Medicine

Supraclinoid internal carotid artery aneurysms -- Aneurysms of the carotid bifurcation -- Aneurysms of the middle cerebral ... Surgical approaches to intracranial aneurysms -- Aneurysms of the anterior cerebral artery -- Paraclinoid aneurysms/carotid ... artery -- Aneurysms of the basilar artery -- PICA aneurysms -- Special considerations -- General principles of aneurysm surgery ... Jean-Pierre Barral and Alain Croibier propose manipulation of the arteries to treat the intestines and other internal organs by ...
more infohttp://lane.stanford.edu/biomed-resources/eb.html?a=v&page=2&proxy-links=true

Frontiers | Flow Diversion for the Treatment of MCA Bifurcation Aneurysms-A Single Centre Experience | NeurologyFrontiers | Flow Diversion for the Treatment of MCA Bifurcation Aneurysms-A Single Centre Experience | Neurology

All patients had a single bifurcation aneurysm of the MCA and none of the aneurysms were acutely ruptured. The average fundus ... All patients had a single bifurcation aneurysm of the MCA and none of the aneurysms were acutely ruptured. The average fundus ... Conclusions: In our series 91.7% of treated MCA bifurcation aneurysms were either completely occluded or showed only a small ... Flow diversion of MCA bifurcation aneurysms should be considered as an alternative treatment strategy when microsurgical ...
more infohttps://www.frontiersin.org/articles/10.3389/fneur.2017.00020/full

ANEURYSM INTERNAL CAROTID  SURGERY  1 | VIDEOTORIUMANEURYSM INTERNAL CAROTID SURGERY 1 | VIDEOTORIUM

... aneurysm.,The following are video recordings of surgical procedures from the ... Microsurgical clipping of internal carotid-posterior communicating artery (ICPC) ... internal carotid arteries, middle cerebral artery, anterior cerebral artery, anterior communicating artery, bifurcation, ... ANEURYSM INTERNAL CAROTID _SURGERY _1 Microsurgical clipping of internal carotid-posterior communicating artery (ICPC) aneurysm ...
more infohttp://videotorium.hu/en/recordings/5803/aneurysm-internal-carotid-surgery-1

Supplements - Surgical Neurology InternationalSupplements - Surgical Neurology International

Background:Internal carotid artery bifurcation (ICAb) aneurysms account for about 2-15% of all intracranial aneurysms. In giant ... anterior cerebral artery-anterior communicating artery complex in the management of giant aneurysms of internal carotid artery ... once some aneurysms have wide neck and anterior cerebral artery (ACA) and middle cerebral artery (MCA) may arise from the ... An unusual variant of the callosomarginal artery from the A1 segment of the anterior cerebral artery. Jun Yoshida, Hiroshi ...
more infohttp://surgicalneurologyint.com/supplements/

Plus itPlus it

Aneurysms were located in internal carotid artery (n = 27), anterior cerebral artery (n = 1), basilar artery (n = 10), and ... susceptibility artifact of the clip in another aneurysm at the left internal carotid-posterior communicating artery bifurcation ... A, Oblique DSA image at the end of coil placement shows no flow in the aneurysm at left internal carotid artery (complete ... A, DSA shows an aneurysm at basilar artery-superior cerebellar artery bifurcation at the end of coil placement. Neck remnant ( ...
more infohttp://www.ajnr.org/content/25/7/1154

Rule Out (R/O) Intracranial Aneurysm - Current ProtocolsRule Out (R/O) Intracranial Aneurysm - Current Protocols

... posterior communicating artery), ICA (internal carotid artery) bifurcation, MCA (middle cerebral artery) trifurcation, basilar ... to assess the contour of the intracranial arteries, particularly in he regions of the ACOM (anterior communicating artery), ... tip, and PICA (posterior inferior cerebellar artery); (2) to assess the anatomy of the Circle of Willis and direction of flow, ... When imaging patients for intracranial aneurysm, the goals are: (1) ...
more infohttp://www.currentprotocols.com/WileyCDA/CPUnit/refId-mia0102.html?quicktabs_cp=cited

Therapeutic effect of enterprise stent-assisted embolization for very small ruptured intracranial aneurysms.Therapeutic effect of enterprise stent-assisted embolization for very small ruptured intracranial aneurysms.

Enterprise stent has been widespread used in wide-necked intracranial aneurysms and good efficacy has been achieved, but there ... Treatment of Cranial Internal Carotid Artery Aneurysm With Willis Covered Stent and Coil Embolization ... Stent-assisted coiling embolization of middle cerebral artery trifurcation wide-necked aneurysms. ... The Use of Single Stent-Assisted Coiling in Treatment of Bifurcation Aneurysms: A Multicenter Cohort Study With Proposal of a ...
more infohttps://www.bioportfolio.com/resources/pmarticle/1820509/Therapeutic-effect-of-enterprise-stent-assisted-embolization-for-very-small-ruptured-intracranial.html

Vascular Neurosurgery (2nd New edition)... | WHSmith BooksVascular Neurosurgery (2nd New edition)... | WHSmith Books

Chapter 1 Aneurysm Surgery Techniques Chapter 2 Ophthalmic Segment Aneurysms Chapter 3 Supraclinoid Internal Carotid Artery ... Communicating Artery Aneurysms Chapter 5 Distal Anterior Cerebral Artery Aneurysms Chapter 6 Middle Cerebral Artery Aneurysm ... Subtemporal Approach Chapter 10 Basilar Bifurcation Aneurysms: Transsylvian Transclinoidal Transcavernous Approach Chapter 11 ... Approach to Aneurysms of the Upper Basilar Artery Chapter 12 Cardiac Arrest for Cerebral Aneurysms Chapter 13 Vertebral Artery ...
more infohttps://www.whsmith.co.uk/products/vascular-neurosurgery-2nd-new-edition/9781604060348

Demographic, procedural and 30-day safety results from the WEB Intra-saccular Therapy Study (WEB-IT)Demographic, procedural and 30-day safety results from the WEB Intra-saccular Therapy Study (WEB-IT)

... middle cerebral artery bifurcation (n=45, 30%), anterior communicating artery (n=40, 26.7%), and internal carotid artery ... represents a novel intrasaccular therapeutic option for the treatment of intracranial wide-necked bifurcation aneurysms (WNBAs ... Treated aneurysms were located at the basilar apex (n=59, 39.3%), ... Nine patients presented with ruptured aneurysms. Of the enrolled patients, 98.7% were treated successfully with WEB devices. ...
more infohttps://insights.ovid.com/jnivs/201712000/01434699-201712000-00009

Most recent papers with the keyword Carotid | Read by QxMDMost recent papers with the keyword Carotid | Read by QxMD

... and a left internal carotid artery angiogram showed a small aneurysm on the bifurcation of the left middle cerebral artery. We ... blister-type sidewall internal carotid artery (ICA) aneurysm. Balloon-assisted coiling was performed with residual neck. He ... Brain abscess after stent-assisted coiling for ruptured middle cerebral artery aneurysm. ... www.readbyqxmd.com/read/29562861/brain-abscess-after-stent-assisted-coiling-for-ruptured-middle-cerebral-artery-aneurysm ...
more infohttps://www.readbyqxmd.com/keyword/1012

Large Anuerysm of Internal Carotid Artery Simulating an Eosinophilic Adenoma | The American Academy of Neurological and...Large Anuerysm of Internal Carotid Artery Simulating an Eosinophilic Adenoma | The American Academy of Neurological and...

THE patient whose case I shall describe had a large aneurysmal tumor of the internal carotid artery. It had ... poor filling of the left middle cerebral beyond the level of bifurcation, and no filling of the left anterior cerebral. The ... figure 5. Angiogram, oblique view: Marked spasm of teh internal carotid artery proximal to the aneurysm, as well as faintly ... Large Anuerysm of Internal Carotid Artery Simulating an Eosinophilic Adenoma Large Anuerysm of Internal Carotid Artery ...
more infohttp://aanos.org/large-anuerysm-of-internal-carotid-artery-simulating-an-eosinophilic-adenoma/

Pterional and Temporal Approaches (Figs. 101 to 115) | Springer for Research & DevelopmentPterional and Temporal Approaches (Figs. 101 to 115) | Springer for Research & Development

Grand W (1980) Microsurgical anatomy of the proximal middle cerebral artery and the internal carotid artery bifurcation. ... Dandy WE (1938) Intracranial aneurysm of internal carotid artery, cured by operation. Ann Surg 107: 654-659PubMedCrossRefGoogle ... Operative treatment of aneurysms on the anterior cerebral and anterior communicating artery. Br Ned J 1: 473-479Google Scholar ... Cerebral Vein Basal Cistern Temporal Approach Internal Cerebral Vein Dural Structure These keywords were added by machine and ...
more infohttps://rd.springer.com/chapter/10.1007/978-3-7091-6992-6_6
  • In the WEB-IT pivotal trial, the WEB System demonstrated 84.6% adequate occlusion, and an extraordinary safety profile for a subset of aneurysms that are challenging to treat with standard embolization coils and assist devices,' noted Adam Arthur, MD, Director of Cerebrovascular & Endovascular Neurosurgery at Semmes Murphey Neurologic & Spine Institute, Associate Professor of Neurosurgery at University of Tennessee, and a Principal Investigator of the WEB-IT Trial. (meddeviceonline.com)
  • In 125 patients with 129 giant aneurysms (≥25 mm) who were treated between 1987 and 2007 at the Department of Neurosurgery of Helsinki University Central Hospital (HUCH). (operativeneurosurgery.com)
  • The WEB System provides a valuable alternative for the treatment of bifurcation aneurysms," said Adam Arthur, MD, Director of Cerebrovascular & Endovascular Neurosurgery at Semmes Murphey Neurologic & Spine Institute and Associate Professor of Neurosurgery at the University of Tennessee. (practicalneurology.com)
  • The role of adiponectin in secondary inflammatory reaction in cerebral ischemia. (biomedsearch.com)
  • Cerebral ischemia is caused by a reduction in blood flow that lasts longer than several seconds. (slideshare.net)
  • In certain embodiments, the disclosure relates to methods of treating cerebral ischemia comprising administering an effective amount of resatorvid to a subject in need thereof. (patentsencyclopedia.com)
  • 1. A method of treating cerebral ischemia comprising administering an effective amount of restorvid to a subject in need thereof. (patentsencyclopedia.com)
  • Schneider PA, Levy E, Bacharach JM, Metzger DC, Randall B, Garcia A, Siddiqui A, Schonholz C, Gray W: A First-in-Human Evaluation of a Novel Mesh-Covered Stent for Treatment of Carotid Stenosis in Patients at High Risk for Endarterectomy. (ubns.com)
  • Zhang Y, Furusawa T, Sia SF, Umezu M, Qian Y. Proposition of an outflow boundary approach for carotid artery stenosis CFD simulation. (springer.com)
  • The subjects were 87 lesions(85 patients)of severe stenosis of the extracranial carotid artery treated with stenting between August 1997 and March 2000. (go.jp)
  • Subjects consisted mainly of patients excluded from carotid endarterectomy according to the criteria of NASCET and ACAS : elderly patients, patients with severe cardiopulmonary complications, patients with contralateral occlusion or severe stenosis, patients with concomitant tandem lesions, and restenosis after carotid endarterectomy. (go.jp)
  • RESULTS DSA detected 168 intracranial aneurysms in 128 patients (24 patients had multiple lesions) and 75 patients had an aneurysm negative DSA. (bmj.com)
  • 11-13 Therefore an attractive, rapid, and non-invasive means for identifying, localising, and characterising intracranial aneurysms, particularly those over 10 mm in size, may prove helpful for screening purposes and also for known lesions, both treated and untreated. (bmj.com)
  • Since the usefulness of diffusion-weighted imaging (DWI) immediate after the coil embolization of the aneurysms for detection of ischemic lesions was proposed [ 3 ], it has been well known that multiple small silent lesions can be observed on postoperative DWI after coil embolization [ 6 ,, 7 ,, 9 ,, 10 ]. (neurointervention.org)
  • While the frequency of the symptomatic territorial ischemic lesions and multiple scattered microembolism was evaluated in several small and a large series, the possible risk factors associated ischemic lesions after coil embolization of the intracranial aneurysms have not been fully analyzed. (neurointervention.org)
  • This study will look at the performance of the Cordis S.M.A.R.T.™ CONTROL ™ Nitinol Stent System for the treatment of TASC C & D superficial femoral artery long lesions (up to 22 cm) i. (bioportfolio.com)
  • We compared patients with fewer than three aneurysms with those having three or more aneurysms and those with fewer than five aneurysms with those having 5 or more lesions. (medcraveonline.com)
  • To assess the influences of these cerebral lesions on cognitive functions in the aged subjects, we evaluated MRI findings and the Hamamatsu psychological battery for higher cerebral function. (go.jp)
  • Balloon Occlusion Testing to Assess Retinal Collateral and Predict Visual Outcomes in the Management of a Fusiform Intraorbital Ophthalmic Artery Aneurysm: Technical Note and Literature Review. (mayo.edu)
  • Rebleeding, hydrocephalus (the excessive accumulation of cerebrospinal fluid), vasospasm (spasm, or narrowing, of the blood vessels), or multiple aneurysms may also occur. (findmeacure.com)