Cerebral Angiography: Radiography of the vascular system of the brain after injection of a contrast medium.Angiography: Radiography of blood vessels after injection of a contrast medium.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.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.Coronary Angiography: Radiography of the vascular system of the heart muscle after injection of a contrast medium.Cerebral Arteries: The arterial blood vessels supplying the CEREBRUM.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)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).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.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.Tomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Cerebrovascular Circulation: The circulation of blood through the BLOOD VESSELS of the BRAIN.Cerebral Veins: Veins draining the cerebrum.Cranial Sinuses: Large endothelium-lined venous channels situated between the two layers of DURA MATER, the endosteal and the meningeal layers. They are devoid of valves and are parts of the venous system of dura mater. Major cranial sinuses include a postero-superior group (such as superior sagittal, inferior sagittal, straight, transverse, and occipital) and an antero-inferior group (such as cavernous, petrosal, and basilar plexus).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.Moyamoya Disease: A noninflammatory, progressive occlusion of the intracranial CAROTID ARTERIES and the formation of netlike collateral arteries arising from the CIRCLE OF WILLIS. Cerebral angiogram shows the puff-of-smoke (moyamoya) collaterals at the base of the brain. It is characterized by endothelial HYPERPLASIA and FIBROSIS with thickening of arterial walls. This disease primarily affects children but can also occur in adults.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.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.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.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)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.Central Nervous System Vascular Malformations: Congenital, inherited, or acquired abnormalities involving ARTERIES; VEINS; or venous sinuses in the BRAIN; SPINAL CORD; and MENINGES.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.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.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.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.Fluorescein Angiography: Visualization of a vascular system after intravenous injection of a fluorescein solution. The images may be photographed or televised. It is used especially in studying the retinal and uveal vasculature.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.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.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.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).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.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.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.Cerebral Arterial Diseases: Pathological conditions of intracranial ARTERIES supplying the CEREBRUM. These diseases often are due to abnormalities or pathological processes in the ANTERIOR CEREBRAL ARTERY; MIDDLE CEREBRAL ARTERY; and POSTERIOR CEREBRAL ARTERY.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.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)Vasculitis, Central Nervous System: Inflammation of blood vessels within the central nervous system. Primary vasculitis is usually caused by autoimmune or idiopathic factors, while secondary vasculitis is caused by existing disease process. Clinical manifestations are highly variable but include HEADACHE; SEIZURES; behavioral alterations; INTRACRANIAL HEMORRHAGES; TRANSIENT ISCHEMIC ATTACK; and BRAIN INFARCTION. (From Adams et al., Principles of Neurology, 6th ed, pp856-61)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.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.Contrast Media: Substances used to allow enhanced visualization of tissues.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)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.Sinus Thrombosis, Intracranial: Formation or presence of a blood clot (THROMBUS) in the CRANIAL SINUSES, large endothelium-lined venous channels situated within the SKULL. Intracranial sinuses, also called cranial venous sinuses, include the superior sagittal, cavernous, lateral, petrous sinuses, and many others. Cranial sinus thrombosis can lead to severe HEADACHE; SEIZURE; and other neurological defects.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.Blindness, Cortical: Total loss of vision in all or part of the visual field due to bilateral OCCIPITAL LOBE (i.e., VISUAL CORTEX) damage or dysfunction. Anton syndrome is characterized by the psychic denial of true, organic cortical blindness. (Adams et al., Principles of Neurology, 6th ed, p460)Craniotomy: Any operation on the cranium or incision into the cranium. (Dorland, 28th ed)Arteriovenous Fistula: An abnormal direct communication between an artery and a vein without passing through the CAPILLARIES. An A-V fistula usually leads to the formation of a dilated sac-like connection, arteriovenous aneurysm. The locations and size of the shunts determine the degree of effects on the cardiovascular functions such as BLOOD PRESSURE and HEART RATE.Epilepsy, Tonic-Clonic: A generalized seizure disorder characterized by recurrent major motor seizures. The initial brief tonic phase is marked by trunk flexion followed by diffuse extension of the trunk and extremities. The clonic phase features rhythmic flexor contractions of the trunk and limbs, pupillary dilation, elevations of blood pressure and pulse, urinary incontinence, and tongue biting. This is followed by a profound state of depressed consciousness (post-ictal state) which gradually improves over minutes to hours. The disorder may be cryptogenic, familial, or symptomatic (caused by an identified disease process). (From Adams et al., Principles of Neurology, 6th ed, p329)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.Collateral Circulation: Maintenance of blood flow to an organ despite obstruction of a principal vessel. Blood flow is maintained through small vessels.Arteriovenous Malformations: Abnormal formation of blood vessels that shunt arterial blood directly into veins without passing through the CAPILLARIES. They usually are crooked, dilated, and with thick vessel walls. A common type is the congenital arteriovenous fistula. The lack of blood flow and oxygen in the capillaries can lead to tissue damage in the affected areas.Blood Flow Velocity: A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.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 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.Neurologic Examination: Assessment of sensory and motor responses and reflexes that is used to determine impairment of the nervous system.Neurosurgical Procedures: Surgery performed on the nervous system or its parts.Hematoma, Subdural: Accumulation of blood in the SUBDURAL SPACE between the DURA MATER and the arachnoidal layer of the MENINGES. This condition primarily occurs over the surface of a CEREBRAL HEMISPHERE, but may develop in the spinal canal (HEMATOMA, SUBDURAL, SPINAL). Subdural hematoma can be classified as the acute or the chronic form, with immediate or delayed symptom onset, respectively. Symptoms may include loss of consciousness, severe HEADACHE, and deteriorating mental status.Cranial Fossa, Anterior: The compartment containing the inferior part and anterior extremities of the frontal lobes (FRONTAL LOBE) of the cerebral hemispheres. It is formed mainly by orbital parts of the FRONTAL BONE and the lesser wings of the SPHENOID BONE.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.Constriction, Pathologic: The condition of an anatomical structure's being constricted beyond normal dimensions.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)Carotid-Cavernous Sinus Fistula: An acquired or spontaneous abnormality in which there is communication between CAVERNOUS SINUS, a venous structure, and the CAROTID ARTERIES. It is often associated with HEAD TRAUMA, specifically basilar skull fractures (SKULL FRACTURE, BASILAR). Clinical signs often include VISION DISORDERS and INTRACRANIAL HYPERTENSION.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.Cavernous Sinus: An irregularly shaped venous space in the dura mater at either side of the sphenoid bone.Vertebral Artery Dissection: Splitting of the vessel wall in the VERTEBRAL ARTERY. Interstitial hemorrhage into the media of the vessel wall can lead to occlusion of the vertebral artery, aneurysm formation, or THROMBOEMBOLISM. Vertebral artery dissection is often associated with TRAUMA and injuries to the head-neck region but can occur spontaneously.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.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)Surgical Instruments: Hand-held tools or implements used by health professionals for the performance of surgical tasks.Temporal Arteries: Arteries arising from the external carotid or the maxillary artery and distributing to the temporal region.Hematoma, Subdural, Intracranial: Accumulation of blood in the SUBDURAL SPACE over the CEREBRAL HEMISPHERE.Coma: A profound state of unconsciousness associated with depressed cerebral activity from which the individual cannot be aroused. Coma generally occurs when there is dysfunction or injury involving both cerebral hemispheres or the brain stem RETICULAR FORMATION.Lateral Medullary Syndrome: INFARCTION of the dorsolateral aspect of MEDULLA OBLONGATA in the BRAIN STEM. It is caused by occlusion of the VERTEBRAL ARTERY and/or the posterior inferior cerebellar artery. Clinical manifestations vary with the size of infarction, but may include loss of pain and temperature sensation in the ipsilateral face and contralateral body below the chin; ipsilateral HORNER SYNDROME; ipsilateral ATAXIA; DYSARTHRIA; VERTIGO; nausea, hiccup; dysphagia; and VOCAL CORD PARALYSIS. (From Adams et al., Principles of Neurology, 6th ed, p801)Headache: The symptom of PAIN in the cranial region. It may be an isolated benign occurrence or manifestation of a wide variety of HEADACHE DISORDERS.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.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.Radionuclide Angiography: The measurement of visualization by radiation of any organ after a radionuclide has been injected into its blood supply. It is used to diagnose heart, liver, lung, and other diseases and to measure the function of those organs, except renography, for which RADIOISOTOPE RENOGRAPHY is available.Intracranial Hemorrhages: Bleeding within the SKULL, including hemorrhages in the brain and the three membranes of MENINGES. The escape of blood often leads to the formation of HEMATOMA in the cranial epidural, subdural, and subarachnoid spaces.Aneurysm, Infected: Aneurysm due to growth of microorganisms in the arterial wall, or infection arising within preexisting arteriosclerotic aneurysms.Hematoma: A collection of blood outside the BLOOD VESSELS. Hematoma can be localized in an organ, space, or tissue.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Remission, Spontaneous: A spontaneous diminution or abatement of a disease over time, without formal treatment.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.Rupture, Spontaneous: Tear or break of an organ, vessel or other soft part of the body, occurring in the absence of external force.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.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.Dura Mater: The outermost of the three MENINGES, a fibrous membrane of connective tissue that covers the brain and the spinal cord.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.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.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.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)Coronary Artery Disease: Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.Pneumonia, Aspiration: A type of lung inflammation resulting from the aspiration of food, liquid, or gastric contents into the upper RESPIRATORY TRACT.Endarterectomy, Carotid: The excision of the thickened, atheromatous tunica intima of a carotid artery.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.Coronary Stenosis: Narrowing or constriction of a coronary artery.Tomography, Spiral Computed: Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures.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.Recurrence: The return of a sign, symptom, or disease after a remission.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.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.Iopamidol: A non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiological procedures.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.Multidetector Computed Tomography: Types of spiral computed tomography technology in which multiple slices of data are acquired simultaneously improving the resolution over single slice acquisition technology.Stents: Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.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.Coronary Vessels: The veins and arteries of the HEART.Iohexol: An effective non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiographic procedures. Its low systemic toxicity is the combined result of low chemotoxicity and low osmolality.Radiographic Image Interpretation, Computer-Assisted: Computer systems or networks designed to provide radiographic interpretive information.Coronary Disease: An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.Tomography, Emission-Computed, Single-Photon: A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.Brain Neoplasms: Neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum. Brain neoplasms are subdivided into primary (originating from brain tissue) and secondary (i.e., metastatic) forms. Primary neoplasms are subdivided into benign and malignant forms. In general, brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain.Indocyanine Green: A tricarbocyanine dye that is used diagnostically in liver function tests and to determine blood volume and cardiac output.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).Brain Edema: Increased intracellular or extracellular fluid in brain tissue. Cytotoxic brain edema (swelling due to increased intracellular fluid) is indicative of a disturbance in cell metabolism, and is commonly associated with hypoxic or ischemic injuries (see HYPOXIA, BRAIN). An increase in extracellular fluid may be caused by increased brain capillary permeability (vasogenic edema), an osmotic gradient, local blockages in interstitial fluid pathways, or by obstruction of CSF flow (e.g., obstructive HYDROCEPHALUS). (From Childs Nerv Syst 1992 Sep; 8(6):301-6)Cerebral Amyloid Angiopathy: A heterogeneous group of sporadic or familial disorders characterized by AMYLOID deposits in the walls of small and medium sized blood vessels of CEREBRAL CORTEX and MENINGES. Clinical features include multiple, small lobar CEREBRAL HEMORRHAGE; cerebral ischemia (BRAIN ISCHEMIA); and CEREBRAL INFARCTION. Cerebral amyloid angiopathy is unrelated to generalized AMYLOIDOSIS. Amyloidogenic peptides in this condition are nearly always the same ones found in ALZHEIMER DISEASE. (from Kumar: Robbins and Cotran: Pathologic Basis of Disease, 7th ed., 2005)Cerebral Ventricles: Four CSF-filled (see CEREBROSPINAL FLUID) cavities within the cerebral hemispheres (LATERAL VENTRICLES), in the midline (THIRD VENTRICLE) and within the PONS and MEDULLA OBLONGATA (FOURTH VENTRICLE).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.Radiographic Image Enhancement: Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed.Brain Diseases: Pathologic conditions affecting the BRAIN, which is composed of the intracranial components of the CENTRAL NERVOUS SYSTEM. This includes (but is not limited to) the CEREBRAL CORTEX; intracranial white matter; BASAL GANGLIA; THALAMUS; HYPOTHALAMUS; BRAIN STEM; and CEREBELLUM.Ultrasonography, Interventional: The use of ultrasound to guide minimally invasive surgical procedures such as needle ASPIRATION BIOPSY; DRAINAGE; etc. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions.Regional Blood Flow: The flow of BLOOD through or around an organ or region of the body.Feasibility Studies: Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.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.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.Dominance, Cerebral: Dominance of one cerebral hemisphere over the other in cerebral functions.Angioplasty, Balloon, Coronary: Dilation of an occluded coronary artery (or arteries) by means of a balloon catheter to restore myocardial blood supply.Myocardial Infarction: NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).Intracranial Pressure: Pressure within the cranial cavity. It is influenced by brain mass, the circulatory system, CSF dynamics, and skull rigidity.Electrocardiography: Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.Fundus Oculi: The concave interior of the eye, consisting of the retina, the choroid, the sclera, the optic disk, and blood vessels, seen by means of the ophthalmoscope. (Cline et al., Dictionary of Visual Science, 4th ed)Gadolinium DTPA: A complex of gadolinium with a chelating agent, diethylenetriamine penta-acetic acid (DTPA see PENTETIC ACID), that is given to enhance the image in cranial and spinal MRIs. (From Martindale, The Extra Pharmacopoeia, 30th ed, p706)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.Injections, Intra-Arterial: Delivery of drugs into an artery.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.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.Radiation Dosage: The amount of radiation energy that is deposited in a unit mass of material, such as tissues of plants or animal. In RADIOTHERAPY, radiation dosage is expressed in gray units (Gy). In RADIOLOGIC HEALTH, the dosage is expressed by the product of absorbed dose (Gy) and quality factor (a function of linear energy transfer), and is called radiation dose equivalent in sievert units (Sv).Aortography: Radiographic visualization of the aorta and its branches by injection of contrast media, using percutaneous puncture or catheterization procedures.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.Triiodobenzoic Acids: Triiodo-substituted derivatives of BENZOIC ACID.Vascular Patency: The degree to which BLOOD VESSELS are not blocked or obstructed.Cardiac Catheterization: Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.Acute Disease: Disease having a short and relatively severe course.Angina Pectoris: The symptom of paroxysmal pain consequent to MYOCARDIAL ISCHEMIA usually of distinctive character, location and radiation. It is thought to be provoked by a transient stressful situation during which the oxygen requirements of the MYOCARDIUM exceed that supplied by the CORONARY CIRCULATION.Xenon Radioisotopes: Unstable isotopes of xenon that decay or disintegrate emitting radiation. Xe atoms with atomic weights 121-123, 125, 127, 133, 135, 137-145 are radioactive xenon isotopes.Cerebrum: Derived from TELENCEPHALON, cerebrum is composed of a right and a left hemisphere. Each contains an outer cerebral cortex and a subcortical basal ganglia. The cerebrum includes all parts within the skull except the MEDULLA OBLONGATA, the PONS, and the CEREBELLUM. Cerebral functions include sensorimotor, emotional, and intellectual activities.Tomography, Emission-Computed: Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.Blood Pressure: PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.Brain Infarction: Tissue NECROSIS in any area of the brain, including the CEREBRAL HEMISPHERES, the CEREBELLUM, and the BRAIN STEM. Brain infarction is the result of a cascade of events initiated by inadequate blood flow through the brain that is followed by HYPOXIA and HYPOGLYCEMIA in brain tissue. Damage may be temporary, permanent, selective or pan-necrosis.Hemodynamics: The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.Extravasation of Diagnostic and Therapeutic Materials: The escape of diagnostic or therapeutic material from the vessel into which it is introduced into the surrounding tissue or body cavity.Chest Pain: Pressure, burning, or numbness in the chest.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.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)Artifacts: Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.Reperfusion: Restoration of blood supply to tissue which is ischemic due to decrease in normal blood supply. The decrease may result from any source including atherosclerotic obstruction, narrowing of the artery, or surgical clamping. It is primarily a procedure for treating infarction or other ischemia, by enabling viable ischemic tissue to recover, thus limiting further necrosis. However, it is thought that reperfusion can itself further damage the ischemic tissue, causing REPERFUSION INJURY.Pia Mater: The innermost layer of the three meninges covering the brain and spinal cord. It is the fine vascular membrane that lies under the ARACHNOID and the DURA MATER.Cineangiography: Motion pictures of the passage of contrast medium through blood vessels.Coronary Circulation: The circulation of blood through the CORONARY VESSELS of the HEART.Image Interpretation, Computer-Assisted: Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.Myocardial Perfusion Imaging: The creation and display of functional images showing where the blood is flowing into the MYOCARDIUM by following over time the distribution of tracers injected into the blood stream.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.Hypoxia, Brain: A reduction in brain oxygen supply due to ANOXEMIA (a reduced amount of oxygen being carried in the blood by HEMOGLOBIN), or to a restriction of the blood supply to the brain, or both. Severe hypoxia is referred to as anoxia, and is a relatively common cause of injury to the central nervous system. Prolonged brain anoxia may lead to BRAIN DEATH or a PERSISTENT VEGETATIVE STATE. Histologically, this condition is characterized by neuronal loss which is most prominent in the HIPPOCAMPUS; GLOBUS PALLIDUS; CEREBELLUM; and inferior olives.Carbon Dioxide: A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.Arteries: The vessels carrying blood away from the heart.Angiocardiography: Radiography of the heart and great vessels after injection of a contrast medium.Oxygen: An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.Spectroscopy, Near-Infrared: A noninvasive technique that uses the differential absorption properties of hemoglobin and myoglobin to evaluate tissue oxygenation and indirectly can measure regional hemodynamics and blood flow. Near-infrared light (NIR) can propagate through tissues and at particular wavelengths is differentially absorbed by oxygenated vs. deoxygenated forms of hemoglobin and myoglobin. Illumination of intact tissue with NIR allows qualitative assessment of changes in the tissue concentration of these molecules. The analysis is also used to determine body composition.Neuroprotective Agents: Drugs intended to prevent damage to the brain or spinal cord from ischemia, stroke, convulsions, or trauma. Some must be administered before the event, but others may be effective for some time after. They act by a variety of mechanisms, but often directly or indirectly minimize the damage produced by endogenous excitatory amino acids.Renal Artery: A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters.Pulmonary Embolism: Blocking of the PULMONARY ARTERY or one of its branches by an EMBOLUS.Fractional Flow Reserve, Myocardial: The ratio of maximum blood flow to the MYOCARDIUM with CORONARY STENOSIS present, to the maximum equivalent blood flow without stenosis. The measurement is commonly used to verify borderline stenosis of CORONARY ARTERIES.Myocardial Revascularization: The restoration of blood supply to the myocardium. (From Dorland, 28th ed)Blood Volume: Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.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.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.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.Cardiac-Gated Imaging Techniques: Timing the acquisition of imaging data to specific points in the cardiac cycle to minimize image blurring and other motion artifacts.Coronary Vessel Anomalies: Malformations of CORONARY VESSELS, either arteries or veins. Included are anomalous origins of coronary arteries; ARTERIOVENOUS FISTULA; CORONARY ANEURYSM; MYOCARDIAL BRIDGING; and others.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.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.Gadolinium: Gadolinium. An element of the rare earth family of metals. It has the atomic symbol Gd, atomic number 64, and atomic weight 157.25. Its oxide is used in the control rods of some nuclear reactors.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.Thrombolytic Therapy: Use of infusions of FIBRINOLYTIC AGENTS to destroy or dissolve thrombi in blood vessels or bypass grafts.Microcirculation: The circulation of the BLOOD through the MICROVASCULAR NETWORK.Perfusion Imaging: The creation and display of functional images showing where the blood flow reaches by following the distribution of tracers injected into the blood stream.Prognosis: A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations.Blood-Brain Barrier: Specialized non-fenestrated tightly-joined ENDOTHELIAL CELLS with TIGHT JUNCTIONS that form a transport barrier for certain substances between the cerebral capillaries and the BRAIN tissue.Subtraction Technique: Combination or superimposition of two images for demonstrating differences between them (e.g., radiograph with contrast vs. one without, radionuclide images using different radionuclides, radiograph vs. radionuclide image) and in the preparation of audiovisual materials (e.g., offsetting identical images, coloring of vessels in angiograms).Calcinosis: Pathologic deposition of calcium salts in tissues.Preoperative Care: Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins. (From Dictionary of Health Services Management, 2d ed)Graft Occlusion, Vascular: Obstruction of flow in biological or prosthetic vascular grafts.Acetazolamide: One of the CARBONIC ANHYDRASE INHIBITORS that is sometimes effective against absence seizures. It is sometimes useful also as an adjunct in the treatment of tonic-clonic, myoclonic, and atonic seizures, particularly in women whose seizures occur or are exacerbated at specific times in the menstrual cycle. However, its usefulness is transient often because of rapid development of tolerance. Its antiepileptic effect may be due to its inhibitory effect on brain carbonic anhydrase, which leads to an increased transneuronal chloride gradient, increased chloride current, and increased inhibition. (From Smith and Reynard, Textbook of Pharmacology, 1991, p337)Technetium: The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, atomic number 43, and atomic weight 98.91. All technetium isotopes are radioactive. Technetium 99m (m=metastable) which is the decay product of Molybdenum 99, has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent. Technetium 99 which is a decay product of technetium 99m, has a half-life of 210,000 years.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.Technetium Tc 99m Exametazime: A gamma-emitting RADIONUCLIDE IMAGING agent used in the evaluation of regional cerebral blood flow and in non-invasive dynamic biodistribution studies and MYOCARDIAL PERFUSION IMAGING. It has also been used to label leukocytes in the investigation of INFLAMMATORY BOWEL DISEASES.Organotechnetium Compounds: Organic compounds that contain technetium as an integral part of the molecule. These compounds are often used as radionuclide imaging agents.Vasodilator Agents: Drugs used to cause dilation of the blood vessels.Exercise Test: Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.Femoral Artery: The main artery of the thigh, a continuation of the external iliac artery.Phlebography: Radiographic visualization or recording of a vein after the injection of contrast medium.

Intracranial arteriovenous malformations. Observations after experience with computerised tomography. (1/3177)

Thirty-six patients with angiographically confirmed intracranial arteriovenous malformations have had computerised tomographic scans performed as part of their investigation. This study demonstrates the incidence of haematoma formation after haemorrhage, the frequency of calcification not visible on plain radiographs, and describes the possible causes for a complicating hydrocephalus. Further information has been gained from the intravenous injection of sodium iothalamate (Conray 420), with comparison of the scans taken before and after the injection.  (+info)

Computerised axial tomography in patients with severe migraine: a preliminary report. (2/3177)

Patients suffering from severe migraine, usually for many years, have been examined by the EMI scanner between attacks. Judged by criteria validated originally by comparison with pneumoencephalography, about half of the patients showed evidence of cerebral atrophy. Perhaps of more significance than generalised atrophy was the frequency of areas of focal atrophy and of evidence of infarction.  (+info)

Two similar cases of encephalopathy, possibly a reversible posterior leukoencephalopathy syndrome: serial findings of magnetic resonance imaging, SPECT and angiography. (3/3177)

Two young women who had encephalopathy that resembled reversible posterior leukoencephalopathy syndrome are presented. The brain magnetic resonance imaging (MRI) of these patients exhibited similar T2-high signal lesions, mostly in the white matter of the posterior hemispheres. Xe-SPECT during the patients' symptomatic period showed hypoperfusion in the corresponding areas, and angiography demonstrated irregular narrowing of the posterior cerebral artery. Clinical manifestations subsided soon after treatment, and the abnormal radiological findings also were almost completely resolved. Thus, we concluded that transient hypoperfusion followed by ischemia and cytotoxic edema might have had a pivotal role in these cases.  (+info)

Large and giant middle to lower basilar trunk aneurysms treated by surgical and interventional neuroradiological methods. (4/3177)

Treatment of large and giant aneurysms of the basilar artery remains difficult and controversial. Three large or giant aneurysms of the lower basilar artery were treated with a combination of surgical and interventional neuroradiological procedures. All patients underwent the balloon occlusion test with hypotensive challenge (blood pressure reduced to 70% of the control value). The third patient did not tolerate the test. In the first patient, both vertebral arteries were occluded through a craniotomy. In the second patient, both the aneurysm and the basilar artery were occluded by detached balloons. In the third patient, one vertebral artery was occluded by surgical clipping and the other by detached helical coils and fiber coils. In spite of anti-coagulation and anti-platelet therapy, postoperative thrombotic or embolic ischemia occurred in the second and third patients. Fibrinolytic therapy promptly corrected the ischemic symptoms, but the second patient developed hemorrhagic complications at the craniotomy area 2 hours later. At follow-up examination, the first patient had only 8th cranial nerve paresis, the second patient who had a hemorrhagic complication was bed-ridden, and the third patient had no deficit. Interventional occlusion requires a longer segment of the parent artery compared to surgical occlusion of the parent artery and might cause occlusion of the perforating arteries. However, selected use of various coils can occlude only a short segment of the parent artery. Thus, the postoperative management of thromboembolic ischemia after the occlusion of the parent artery is easier using the interventional technique.  (+info)

Combined carotid endarterectomy and coronary artery bypass graft. (5/3177)

Atherosclerosis is a generalized disease which afflicts a considerable number of patients in both the carotid and coronary arteries. Although the risk of stroke or death use to combined carotid endarterectomy (CEA) and coronary artery bypass graft (CABG) is thought to be higher than that of each individual operation, the combined procedure is generally preferred over staged operations to treat such patients. We performed the combined procedure safely with the aid of intraoperative portable digital subtraction angiography (DSA). This report describes our experience with the operative strategy of simultaneous CEA and CABG. Ninety CEA and 404 CABG were carried out between January 1989 and December 1997. A total of six patients received the combined procedure with the aid of intraoperative DSA; they were studied retrospectively. Postoperative mortality and morbidity after the combined procedure was 0%. In the combined procedure, neurological complications are difficult to detect after CEA because the patient must be maintained under general anesthesia and extracorporeal circulation during the subsequent CABG. However, intraoperative DSA can confirm patency of the internal carotid artery and absence of flap formation after CEA, and the CABG can be performed safely. Intraoperative portable DSA between CEA and CABG is helpful in preventing perioperative stroke in the combined procedure.  (+info)

Angiographical extravasation of contrast medium in hemorrhagic infarction. Case report. (6/3177)

Leakage of the contrast medium was noted on angiograms of a patient whose autopsied brain disclosed typical pathological findings of hemorrhagic infarction. The case was a 63-year old woman with mitral valve failure, who suddenly had loss of consciousness and right-sided hemiplegia. The left carotid angiography performed six hours after onset demonstrated middle cerebral arterial axis occlusion, and the second angiography performed three days after onset displayed recanalization of the initially occluded artery as well as extravasation of the contrast medium. Fourteen days after onset the patient died and an autopsy was performed. The brain demonstrated perivascular punctate hemorrhages in the area supplied by the middle cerebral artery, and neither hematoma nor microaneurysm was disclosed pathologically. A short discussion is given on the possible relationship between recanalization and hemorrhagic infarction. The clinical assessment of hemorrhagic infarction has not been established successfully.  (+info)

Carotid endarterectomy and intracranial thrombolysis: simultaneous and staged procedures in ischemic stroke. (7/3177)

PURPOSE: The feasibility and safety of combining carotid surgery and thrombolysis for occlusions of the internal carotid artery (ICA) and the middle cerebral artery (MCA), either as a simultaneous or as a staged procedure in acute ischemic strokes, was studied. METHODS: A nonrandomized clinical pilot study, which included patients who had severe hemispheric carotid-related ischemic strokes and acute occlusions of the MCA, was performed between January 1994 and January 1998. Exclusion criteria were cerebral coma and major infarction established by means of cerebral computed tomography scan. Clinical outcome was assessed with the modified Rankin scale. RESULTS: Carotid reconstruction and thrombolysis was performed in 14 of 845 patients (1.7%). The ICA was occluded in 11 patients; occlusions of the MCA (mainstem/major branches/distal branch) or the anterior cerebral artery (ACA) were found in 14 patients. In three of the 14 patients, thrombolysis was performed first, followed by carotid enarterectomy (CEA) after clinical improvement (6 to 21 days). In 11 of 14 patients, 0.15 to 1 mIU urokinase was administered intraoperatively, ie, emergency CEA for acute ischemic stroke (n = 5) or surgical reexploration after elective CEA complicated by perioperative intracerebral embolism (n = 6). Thirteen of 14 intracranial embolic occlusions and 10 of 11 ICA occlusions were recanalized successfully (confirmed with angiography or transcranial Doppler studies). Four patients recovered completely (Rankin 0), six patients sustained a minor stroke (Rankin 2/3), two patients had a major stroke (Rankin 4/5), and two patients died. In one patient, hemorrhagic transformation of an ischemic infarction was detectable postoperatively. CONCLUSION: Combining carotid surgery with thrombolysis (simultaneous or staged procedure) offers a new therapeutic approach in the emergency management of an acute carotid-related stroke. Its efficacy should be evaluated in interdisciplinary studies.  (+info)

Surgical treatment of internal carotid artery anterior wall aneurysm with extravasation during angiography--case report. (8/3177)

A 54-year-old female presented subarachnoid hemorrhage from an aneurysm arising from the anterior (dorsal) wall of the internal carotid artery (ICA). During four-vessel angiography, an extravasated saccular pooling of contrast medium emerged in the suprasellar area unrelated to any arterial branch. The saccular pooling was visualized in the arterial phase and cleared in the venophase during every contrast medium injection. We suspected that the extravasated pooling was surrounded by hard clot but communicated with the artery. Direct surgery was performed but major premature bleeding occurred during the microsurgical procedure. After temporary clipping, an opening of the anterior (dorsal) wall of the ICA was found without apparent aneurysm wall. The vessel wall was sutured with nylon thread. The total occlusion time of the ICA was about 50 minutes. Follow-up angiography demonstrated good patency of the ICA. About 2 years after the operation, the patient was able to walk with a stick and to communicate freely through speech, although left hemiparesis and left homonymous hemianopsia persisted. The outcome suggests our treatment strategy was not optimal, but suture of the ICA wall is one of the therapeutic choices when premature rupture occurs in the operation.  (+info)

*Cerebral angiography

... is a form of angiography which provides images of blood vessels in and around the brain, thereby allowing ... cerebral angiography may yield better images than less invasive methods such as computed tomography angiography and magnetic ... In some jurisdictions, cerebral angiography is required to confirm brain death.[citation needed] Prior to the advent of modern ... In addition, cerebral angiography allows certain treatments to be performed immediately, based on its findings. If, for example ...

*Meningohypophyseal artery

Diagnostic cerebral angiography. Philadelphia: Lippincott Willims & Wilkins. pp. 84-87. ISBN 0-397-58404-0. ...

*Internal carotid artery

386-393 [1] Osborn, Anne (1999). Diagnostic Cerebral Angiography (2nd ed.). Philadelphia, PA, USA: Lippincott Williams & ... The internal carotid artery can receive blood flow via an important collateral pathway supplying the brain, the cerebral ... artery the anterior choroidal artery The internal carotid then divides to form the anterior cerebral artery and middle cerebral ... Middle cerebral artery (a terminal branch) The sympathetic trunk forms a plexus of nerves around the artery known as the ...

*Dural arteriovenous fistula

Cerebral angiography is the diagnostic standard. MRIs are usually normal. The Borden Classification of dural arteriovenous ... 1995). "Cerebral dural arteriovenous fistulas: clinical and angiographic correlation with a revised classification of venous ...

*1927 in science

António Egas Moniz develops cerebral angiography. February 23 - German theoretical physicist Werner Heisenberg writes a letter ...

*António Egas Moniz

Clinical cerebral angiography), Turin, 1938. Die cerebrale Arteriographie und Phlebographie (Cerebral arteriography and ... L'angiographie cérébrale, ses applications et résultats en anatomic, physiologie et clinique (Cerebral angiography, its ... was a Portuguese neurologist and the developer of cerebral angiography. He is regarded as one of the founders of modern ... His work led to the use of angiography to detect internal carotid occlusion, as well as two Nobel Prize nominations in this ...

*Bonnet-Dechaume-Blanc syndrome

Cerebral angiography examinations may expose AVMs in the cerebrum. MRIs are also used in imaging the brain and can allow ... MRI, CT, and cerebral angiography are all useful for investigating the extent and location of any vascular lesions that are ... Fluorescein angiography is commonly used to diagnose the syndrome. There have been several methods in treating patients who ... Fluorescein angiography is quite useful in diagnosing the disease, and the use of ultrasonography and optical coherence ...

*Cerebral arteriovenous malformation

The best images of an AVM are obtained through cerebral angiography. This procedure involves using a catheter, threaded through ... A cerebral arteriovenous malformation (cerebral AVM, CAVM, cAVM) is an abnormal connection between the arteries and veins in ... and cerebral angiography. A CT scan of the head is usually performed first when the subject is symptomatic. It can suggest the ... "Biology of cerebral arteriovenous malformations with a focus on inflammation". Journal of Cerebral Blood Flow & Metabolism. 35 ...

*Vertebral artery dissection

The gold standard is cerebral angiography (with or without digital subtraction angiography). This involves puncture of a large ... MR angiography). They use smaller amounts of contrast and are not invasive. CT angiography and MR angiography are more or less ... Kaufmann TJ, Kallmes DF (June 2008). "Diagnostic cerebral angiography: archaic and complication-prone or here to stay for ... The thrombolytic drug is administered either intravenously or during cerebral angiography through a catheter directly into the ...

*Cavernous sinus thrombosis

Cerebral angiography can be performed, but it is invasive and not very sensitive. Orbital venography is difficult to perform, ... Coutinho, J; de Bruijn, SF; Deveber, G; Stam, J (2011). "Anticoagulation for cerebral sinus thrombosis". Cochrane Database Syst ...

*Cerebral arteries

Cerebral Angiography, Thieme, pp. 79-91, ISBN 978-0-86577-067-6 Osborn, Anne G.; Jacobs, John M. (1999), Diagnostic Cerebral ... The three main arteries consist of the: Anterior cerebral artery (ACA) Middle cerebral artery (MCA) Posterior cerebral artery ( ... Cerebral arteries describe three main pairs of arteries and their branches, which perfuse the cerebrum of the brain. ... PCA) Both the ACA and MCA originate from the cerebral portion of internal carotid artery, while PCA branches from the ...

*Dense artery sign

Through cerebral angiography, the sign has been demonstrated to correspond to embolic or atherosclerotic occlusion of an artery ... The sign has been observed in the middle cerebral artery (MCA), posterior cerebral artery (PCA), vertebral artery, and basilar ... Launes J, Ketonen L (November 1987). "Dense middle cerebral artery sign: an indicator of poor outcome in middle cerebral artery ... 1993). "Increased density in the middle cerebral artery by nonenhanced computed tomography. Prognostic value in acute cerebral ...

*Subarachnoid hemorrhage

If a cerebral aneurysm is identified on angiography, two measures are available to reduce the risk of further bleeding from the ... Aneurysms of the middle cerebral artery and its related vessels are hard to reach with angiography and tend to be amenable to ... and can be confirmed by transcranial doppler or cerebral angiography. About one third of people admitted with subarachnoid ... the choice is between cerebral angiography (injecting radiocontrast through a catheter to the brain arteries) and CT ...

*Middle cerebral artery

Cerebral Angiography, Thieme, pp. 105-123, ISBN 978-0-86577-067-6 Osborn, Anne G.; Jacobs, John M. (1999), Diagnostic Cerebral ... Occlusion of the middle cerebral artery results in Middle cerebral artery syndrome, potentially showing the following defects: ... The middle cerebral artery (MCA) is one of the three major paired arteries that supply blood to the cerebrum. The MCA arises ... The middle cerebral artery can be classified into 4 parts: M1: The sphenoidal segment, so named due to its origin and loose ...

*Science and technology in Portugal

In 1949, the Portuguese neurologist António Egas Moniz, an early developer of the cerebral angiography, was awarded the Nobel ... he also was a pioneer in the development of cerebral angiography Pedro Nunes - 16th century mathematician, one of the greatest ...

*Cerebral venous sinus thrombosis

Cerebral angiography may demonstrate smaller clots than CT or MRI, and obstructed veins may give the "corkscrew appearance". ... There are various neuroimaging investigations that may detect cerebral sinus thrombosis. Cerebral edema and venous infarction ... In cerebral venous sinus thrombosis, blood clots usually form both in the veins of the brain and the venous sinuses. The ... Cerebral venous sinus thrombosis (CVST) is the presence of acute thrombosis (a blood clot) in the dural venous sinuses, which ...

*Neuroimaging

In 1927 Egas Moniz introduced cerebral angiography, whereby both normal and abnormal blood vessels in and around the brain ... Uptake of SPECT agent is nearly 100% complete within 30 to 60 seconds, reflecting cerebral blood flow (CBF) at the time of ... SPECT provides a "snapshot" of cerebral blood flow since scans can be acquired after seizure termination (so long as the ... Dandy also observed that air introduced into the subarachnoid space via lumbar spinal puncture could enter the cerebral ...

*Death in Singapore

These tests are cerebral angiography to confirm that there is no intracranial blood flow, and a radionuclide scan to confirm ...

*Moyamoya disease

Cerebral angiography showed a right moyamoya pattern and an ipsilateral dural AVF fed by branches of the external carotid ... These vessels are the ACA (anterior cerebral artery), MCA (middle cerebral artery), and ICA (internal carotid artery). The ... On angiography, a "puff of smoke" appearance is seen, and the treatment of choice is surgical bypass. About 10% of cases of ... The artery is then sutured to a branch of the middle cerebral artery on the surface of the brain and the bone is replaced. In ...

*William H. Oldendorf

X-ray shadow radiography and cerebral angiography. The first line was influential in the evolving concept of neuroimaging; the ... and research on cerebral metabolism." In 1981 he received the President's Award for Distinguished Federal Civilian Service and ... and in characterizing clinically important diseases such as cerebral ischemia, starvation, and epilepsy. Oldendorf's ...

*Thunderclap headache

It is not usually necessary to proceed to cerebral angiography, a more precise but invasive investigation of the brain's blood ... Cerebral venous sinus thrombosis, thrombosis of the veins of the brain, usually causes a headache that reflects raised ... Day JW, Raskin NH (November 1986). "Thunderclap headache: symptom of unruptured cerebral aneurysm". Lancet. 2 (8518): 1247-8. ... The most important causes are subarachnoid hemorrhage, cerebral venous sinus thrombosis, and cervical artery dissection[ ...

*Carotid stenting

... or post-stent balloon dilation and cerebral angiography. Carotid stenting is the preferred therapy for patients who are at an ... A number of other steps may or may not be performed, including the use of a cerebral protection device, pre- ... Society for Cardiovascular Angiography and Interventions, Society of Interventional Radiology, Society of NeuroInterventional ...

*Anterior cerebral artery

Angiography studies cite that the vessel can be seen 67% or 50% of the time. The anterior cerebral artery develops from a ... Anterior cerebral artery Cerebral arteries seen from beneath. Anterior cerebral artery visible at centre. The arterial circle ... 3.0.co;2-t Osborn, Anne G.; Jacobs, John M. (1999), Diagnostic Cerebral Angiography, Lippincott Williams & Wilkins, pp. 143-144 ... Uchino, A; Nomiyama, K; Takase, Y; Kudo, S (September 2006). "Anterior cerebral artery variations detected by MR angiography". ...

*Beating heart cadaver

Cerebral angiography, electroencephalography, transcranial doppler ultrasonography, and cerebral scintigraphy are some of the ...

*Legal death

... and demonstration of loss of cerebral blood flow (cerebral angiography, transcranial doppler ultrasonography, or cerebral ... and other confounding factors may also produce cerebral electric silence on EEG. van der Lugt A (November 2010). "Imaging tests ...

*Susac's syndrome

Fluorescein angiography may demonstrate leakage in areas remote from the retinal infarctions. In a recent analysis (Susac et al ... and brain biopsy findings suggest a small vessel vasculopathy leading to arteriolar occlusion and microinfarction of cerebral, ... Both patients underwent fluorescein retinal angiography that demonstrated multifocal retinal artery occlusions without evidence ...
TY - JOUR. T1 - Arterial dissections complicating cerebral angiography and cerebrovascular interventions. AU - Cloft, Harry J.. AU - Jensen, Mary E.. AU - Kallmes, David F. AU - Dion, Jacques E.. PY - 2000. Y1 - 2000. N2 - BACKGROUND AND PURPOSE: Iatrogenic dissections are an uncommon complication of cerebral angiography. We retrospectively reviewed 12 cases of arterial dissections complicating cerebral angiography and cerebrovascular interventions to evaluate the clinical course of these dissections. METHODS: Cases from a large tertiary center performing a large number of neurovascular procedures were collected retrospectively. The patients medical records and imaging studies were reviewed, with particular attention given to the cause of the dissection, the development of ischemic events resulting from the dissection, and the treatment used. RESULTS: Each of nine dissections affected a vertebral artery, each of two affected an internal carotid artery, and one affected a common carotid artery. ...
This revised and enlarged edition of Cerebral Angiography, which includes new angiographic studies and illustrative drawings, offers detailed guidance on diagnostic use of the procedure. The first part of the book describes the normal anatomy of the cerebral arteries and veins, with attention to mor.... Full description. ...
This revised and enlarged edition of Cerebral Angiography, which includes new angiographic studies and illustrative drawings, offers detailed guidance on diagnostic use of the procedure. The first par
You had a procedure called cerebral angiography. This is an X-ray study of the blood vessels that supply your brain. Heres what to do at home afterward.
TY - CHAP. T1 - Cerebral angiography in pediatrics. AU - Scotti, G.. AU - Pieralli, S.. AU - Righi, C.. AU - Triulzi, F.. AU - Visciani, A.. PY - 1989. Y1 - 1989. UR - http://www.scopus.com/inward/record.url?scp=0024576981&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=0024576981&partnerID=8YFLogxK. M3 - Chapter. AN - SCOPUS:0024576981. VL - 1. SP - 257. EP - 263. BT - Rivista di Neuroradiologia. ER - ...
Even in challenging cases, CT angiography offers an accurate and rapid diagnosis for blunt trauma victims who may have aortic or great vessel injury negating the need for more invasive procedures, according to a recent study conducted by radiologists at the University of Washington and the Harborview Injury Prevention and Research Center in Seattle. CTA is commonly used to rule out blunt aortic and intrathoracic great vessel injuries, but sometimes the results are indeterminate, said Marla Sammer, M.D., lead author of the study.
Color enhanced medicine radiology angiography showing normal blood vessels in the brain. (Enhancement of GA3404) - Stock Image C003/4771
Hi all-- Can you please comment to help me confirm the appropriate 36000 series for this given cerebral angiogram scenario? Patient is normal arch art
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Discussion about Improvement of Stability of the Scan Timing by Placing Small ROI in Cerebral 3D-CTA. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
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Background and Purpose-Detection of acute infarction in the posterior circulation is challenging. We aimed to determine the additional value of tomograpy (CT) perfusion to noncontrast CT and CT angiography source images for infarct detection and localization in patients suspected of acute ischemic posterior circulation stroke. Methods-Patients with suspected acute ischemic ... read more posterior circulation stroke were selected from the Dutch acute Stroke Trial (DUST) study. Patients underwent noncontrast CT, CT angiography, and CT perfusion within 9 hours after stroke onset and CT or MRI on follow-up. Images were evaluated for signs and location of ischemia. Discrimination of 3 hierarchical logistic regression models (noncontrast CT [A], added CT angiography source images [B], and CT perfusion [C]) was compared with C-statistics. Results-Of 88 patients, 76 (86%) had a clinical diagnosis of ischemic stroke on discharge and 42 patients (48%) showed a posterior circulation infarct on follow-up ...
In this report, a case of anomalous internal carotid artery looping into the orbital apex is presented. The patient was a 41-year-old man with sudden onset headache, suggestive of aneurysmal subarachnoid hemorrhage (SAH). Imaging with CT demonstrated a perimesencephalic distribution of blood. Cerebral angiography confirmed non-aneurysmal, perimesencephalic SAH, but incidentally noted an anomalous left internal carotid artery with a course into the orbital cone. This is the only known example of this anatomic variation. Potential embryological explanations are discussed. ...
Background: Collateral grade on cerebral angiography has great predictive significance for patient outcome, which is important to determine indication for endovascular therapy in acute ischemic stroke (AIS). Distal hyperintense vessels (DHV) on fluid-attenuated inversion recovery imaging (FLAIR) is a noninvasive and useful imaging marker that reflects leptomeningeal collateral flow. We investigated whether DHV in patients with AIS was associated with collaterals grade on cerebral angiography and clinical outcome after endovascular therapy.. Methods: We retrospectively reviewed patients with AIS who had internal carotid artery or middle cerebral artery occlusion in three comprehensive stroke centers from August 2011 to July 2015. We selected those who underwent FLAIR sequence before endovascular therapy. Presence of DHV was evaluated using a previously-published method. Collateral grades on pre-treatment cerebral angiography were assessed with the American Society of Interventional and ...
In this paper, we propose a robust 3D rigid registration technique for detecting cerebral aneurysms, arterial stenosis, and other vascular anomalies in a brain CT angiography. Our method is composed o
The embryologic development of cerebral circulation is a natures miracle. At approximately 30-days of gestation, the internal carotid arteries (ICAs) arise from dorsal aortic arches and anastomose with longitudinal neural arteries to form a primitive vertebrobasilar system at four major sites [1] named according to their neighbouring structures as trigeminal, otic, hypoglossal and proatlantal intersegmental arteries. Failure of regression of these vessels lead to persistent primitive carotid-vertebrobasilar anastamoses of which most cephalic and most common is PTA [1]. Its reported prevalence is 0.1%-0.6% [2] of cerebral angiograms. Internal carotid artery gives origin to PTA which then anastomoses with the midbasilar artery. Basilar artery is usually hypoplastic caudal to this anastomosis [2 ...
When imaging patients for intracranial aneurysm, the goals are: (1) to assess the contour of the intracranial arteries, particularly in he regions of the ACOM (anterior communicating artery), PCOM (posterior communicating artery), ICA (internal carotid artery) bifurcation, MCA (middle cerebral artery) trifurcation, basilar tip, and PICA (posterior inferior cerebellar artery); (2) to assess the anatomy of the Circle of Willis and direction of flow, and; (3) to determine if there is evidence of a recent subarachnoid bleed
Uzziniet vairāk par 3D-RA 3D Rotational Angiography imaging technology. Skatiet specifikācijas, lejupielādējiet atbalsta dokumentus un atklāt saistītus produktus.
An area of your body, usually the groin, is cleaned and numbed with a local numbing medicine (anesthetic). A thin, hollow tube called a catheter is placed through an artery. The catheter is carefully moved up through the main blood vessels in the belly area and chest into an artery in the neck. X-rays help the doctor guide the catheter to the correct position. Once the catheter is in place, the dye is sent through the catheter. X-ray images are taken to see how the dye moves through the artery and blood vessels of the brain. The dye helps highlight any blockages in blood flow.. Sometimes, a computer removes the bones and tissues on the images being viewed, so that only the blood vessels filled with the dye are seen. This is called digital subtraction angiography (DSA).. After the x-rays are taken, the catheter is withdrawn. Pressure is applied on the leg at the site of insertion for 10 to 15 minutes to stop the bleeding or a device is used to close the tiny hole. A tight bandage is then applied. ...
Are you a cardiac surgeon? See rare heart tumors by exploring Figure 1s cardiac surgery category. Interested in the brain? Review cerebral angiograms shared by neurologists in real time. New cases are shared by physicians, nursing professionals, and allied healthcare professionals on Figure 1 every day.
Superselectivity represents the most recent evolution of neuroangiogra-phy. Its objective is the visualization of the fine arterioles following low pressure injection of a small amount of contrast...
Eating has become quite a pastime for many people around the world. While eating lots of fatty foods can be fun, it can also lead to a myriad of different health problems. Over time, the fat can start to build up in the arteries, in turn causing high cholesterol, high blood pressure, and a significant risk for a heart attack or a stroke.
Eating has become quite a pastime for many people around the world. While eating lots of fatty foods can be fun, it can also lead to a myriad of different health problems. Over time, the fat can start to build up in the arteries, in turn causing high cholesterol, high blood pressure, and a significant risk for a heart attack or a stroke.
Incapacitating vertebrobasilar insufficiency is generally associated with bilateral vertebral artery disease, whereas unilateral vertebral artery stenosis usually is clinically silent. Regional brain perfusion has not been part of the routine evaluation of patients with vertebrobasilar insufficiency. This report describes two patients who had isolated unilateral vertebral artery stenosis operatively corrected to eliminate their incapacitating vertebrobasilar insufficiency. Hindbrain hypoperfusion was identified preoperatively and evaluated postoperatively, then correlated with patient presentation and response to revascularization.. Two patients with incapacitating vertebrobasilar insufficiency presented with isolated unilateral vertebral artery stenosis with patent, nonstenotic internal carotid arteries. Hindbrain hypoperfusion was demonstrated by iodine-123-iodoamphetamine single-photon emission computed tomography preoperatively and demonstrated significant improvement following ...
TY - JOUR. T1 - MRI of basilar artery hypoplasia associated with persistent primitive trigeminal artery. AU - Boyko, Orest. AU - Curnes, J. T.. AU - Blatter, D. D.. AU - Parker, D. L.. PY - 1996/1. Y1 - 1996/1. N2 - We report three patients with persistent trigeminal arteries, in all of whom the proximal basilar artery was hypoplastic. We draw attention to this common observation, which should not be mistaken for acquired narrowing.. AB - We report three patients with persistent trigeminal arteries, in all of whom the proximal basilar artery was hypoplastic. We draw attention to this common observation, which should not be mistaken for acquired narrowing.. KW - Basilar artery. KW - Congenital variants. KW - Trigeminal artery. UR - http://www.scopus.com/inward/record.url?scp=0030061136&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=0030061136&partnerID=8YFLogxK. U2 - 10.1007/s002340050184. DO - 10.1007/s002340050184. M3 - Article. C2 - 8773267. AN - SCOPUS:0030061136. VL - ...
Carotid cavernous fistulas are abnormal communications between the carotid artery and the cavernous sinus, either directly or via intradural branches of the internal or external carotid arteries.1 Direct fistulas are high flow, frequently follow trauma, and tend to have a dramatic clinical presentation. In contrast, indirect fistulas are low flow, often spontaneous, and may have a subtle clinical presentation. Symptoms and signs common to both types of fistulas include proptosis, chemosis, diplopia, visual loss, pulse-synchronous tinnitus, orbital bruit, elevated intraocular pressure, dilated episcleral veins, and retinal venous congestion. The pattern of venous drainage, either anterior into the ophthalmic veins or posterior into the petrosal sinuses, often dictates the clinical findings and radiographic appearance. Anterior drainage typically leads to the most dramatic ocular findings and enlargement of the superior orbital vein, the latter often detectable with CT or MRI. However, superior ...
Clinical record. A 33-year-old man presented to an emergency department with acute dysphasia and a dense right hemiparesis. His National Institute Health Stroke Scale score was 12, indicating a moderate severity stroke (score range 0-42, with increasing values indicating increasing severity). His computed tomography (CT) brain scan was normal. A CT angiogram showed a filling defect in the left intracranial internal carotid artery. Intravenous thrombolysis was commenced 2.5 hours after stroke onset and completed during urgent transit to our hospital for endovascular thrombectomy. Combined stent retrieval and suction thrombectomy of the left internal carotid occlusion restored flow 4.5 hours after stroke onset. A small dissection in the left intracranial internal carotid artery was the source of the thrombotic occlusion (Figure). A magnetic resonance imaging scan of the brain showed small scattered infarctions in the left middle cerebral arterial territory.. The patient was later found to have a ...
Background Stent-assisted coil embolization is useful for wide-necked, large and giant aneurysms, and is effective for avoiding coil herniation. However, the mobility of the microcatheter is often restricted, resulting in deviated or unbalanced coiling. In order to prevent this insufficient coiling, the authors devised a method for microcatheterization, the one and a half round microcatheterization technique. This technique is based on the formation of a one and a half round loop by the microcatheter along the aneurysmal wall. Furthermore, this technique can be supplemented with the double-catheter technique.. ...
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Moyamoya syndrome is a rare condition in which blood vessels at the base of the skull progressively narrow, limiting the flow of oxygenated blood to the brain. Surgical treatment options for Moyamoya syndrome include direct revascularization procedures such as an EC-IC bypass as well as indirect revascularization procedures like encephaloduroarteriosynangiosis (EDAS) and pial synangiosis. Here at Columbia University Medical Center/NewYork-Presbyterian Hospital, our neurosurgeons have particular expertise using these and other surgeries to treat patients with Moyamoya syndrome.. "Moyamoya" means "puff of smoke" in Japanese, and the condition is so named because the body grows a secondary network of small vessels in an effort to compensate for the restricted blood flow. On an arteriogram, the network of new vessels resembles a cloud-or puff of smoke. Moyamoya is more common in Japan than in the U.S., but it is unusual everywhere.. The blood vessel network that gives Moyamoya its name may lead to ...
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Characterized by headaches and seizures, an arteriovenous malformation (AVM) of the brain is a derivative of arteriovenous malformation, a disorder of the bodys circulatory system. An AVM of the brain, also known as a cerebral AVM, is a malformed group of blood vessels composed of an intricate tangle of arteries and veins. Though localized, cerebral AVMs can lead to severe neurological problems. Research in the field of arteriovenous malformation is growing particularly with noninvasive treatment options. What are cerebral AVMs? Cerebral AVMs may form during prenatal stages of a childs development, either during embryonic or fetal growth. Studies have found a certain number of cases form shortly after birth; however, the condition frequently presents in adults in their 20s or 30s. Cerebral AVMs are commonly misdiagnosed, with most cases found only incidentally through the performance of CT (computed tomography) scans on the brain. Patients complain of regular headaches and seizures before ...
UniProtKB/Swiss-Prot : 73 Moyamoya disease 2: A progressive cerebral angiopathy characterized by bilateral intracranial carotid artery stenosis and telangiectatic vessels in the region of the basal ganglia. The abnormal vessels resemble a puff of smoke (moyamoya) on cerebral angiogram. Affected individuals can develop transient ischemic attacks and/or cerebral infarction, and rupture of the collateral vessels can cause intracranial hemorrhage. Hemiplegia of sudden onset and epileptic seizures constitute the prevailing presentation in childhood, while subarachnoid bleeding occurs more frequently in adults ...
Under the influence of Professor Percival Bailey, the resident staff at the University of Illinois Research and Educational Hospitals in Chicago in the 1940s was induced to take up the then newly developing procedure of angiography of the vessels to and in the brain. Eventual facility with percutaneous carotid angiography led to accidental vertebral angiography, followed by percutaneous deliberate vertebral angiography as developed by the residents, among whom were Drs. Holden, Chester Powell, and myself. Retrograde brachial vertebral angiography followed. By these procedures, a large number of intracranial vascular and neoplastic lesions were discovered, our first one was a large pericallosal aneurysm operated on in 1946 by Dr. Milton Tinsley with me assisting. Ocular loupes were used for magnification. The lesion was not visualized in the postoperative angiogram which I carried out. After becoming a junior staff member of the staff under Dr. Eric Oldberg, I carried out angiograms and was ...
Endovascular ICA occlusion is a widely accepted and effective method in the treatment of large and giant carotid aneurysms with anticipated surgical or endovascular difficulty; however, despite the use of various testing techniques to determine whether a patient could tolerate permanent carotid occlusion, 5-22% of patients undergoing balloon occlusion of the carotid artery develop ischemic complications (7-9), making the preservation of the ICA patency a more desirable goal when achievable. Several reports have similarly documented contralateral aneurysm formation or growth after permanent ICA occlusion (7, 10). The selective endovascular treatment of wide-necked intracranial aneurysms remains challenging and leads to less favorable treatment results and long-term angiographic outcome than for small aneurysms. The stent-assisted coil embolization technique is still limited to some difficult cases because of the unavailability of stent devices that adequately negotiate tortuous intracranial ...
The digital subtraction angiography method useful for three dimensional (3D) imaging of a selected volume of a body comprises the following steps. Acquiring first and second 3D data sets representative of an image of substantially the same selected volume in the body, the first and second data sets being acquired at different times corresponding to a pre- and a post injection of a contrast medium, respectively. Determining common reference points for spatially corresponding subvolumes in the data sets. Comparing in a 3D spatial manner data in subvolumes of the second data set with data in corresponding subvolumes in the first data set in order to determine a new reference point in each of the subvolumes of the first data set which results in a best match of the spatial similarity of the data in the corresponding subvolumes of the second data set. Spatially interpolating new data for the subvolumes of said first data set using the new reference points determined above and the originally acquired
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Utility of CT angiography and MR angiography for the follow-up of experimental aneurysms treated with stents or Guglielmi detachable coils.: We recommend furthe
Moyamoya syndrome (sometimes referred as Moyamoya disease also) is predominantly a problem observed in kids. It is a rare medical complexity when the walls of carotid arteries
A method of performing angiography of the occular fundus of an eye of a patient includes the steps of injecting intravenously calcein into the patient in an effective amount immediately prior to angiography and performing angiography on the patient. The invention further discloses a method of performing photocoagulation therapy and/or photodynamic therapy and angiography of the ocular fundus of an eye of a patient which includes the steps of performing photocoagulation therapy, injecting intravenously calcein into the patient in an effective amount immediately prior to angiography, and performing angiography on the patient.
There is a direct connection between the left internal carotid and basilar arteries, at level of the cavernous sinus. This is below the level of the posterior communicating arteries. Note the small size of the basilar and vertebral arteries.
3D angiography video of the left internal carotid artery (major artery of the head and neck that supplies blood to the brain) following surgery to treat haematoma (internal bleeding). The patient suffers from arteriovenous malformation (AVM) which is an abnormal connection between veins and arteries and it is usually congenital. Angiography is an imaging technique in which a radio-opaque contrast medium is injected into blood vessels to allow them to be seen on an X-ray. - Stock Video Clip K002/9044
CT Angiographic Characterization and Eveluation of Plaque by Age, Gender, Ethnicity, Race, and Cardiovascular Risk Factors (CORRELATE) Grant ...
Symptoms, treatment, risks, and surgery | Dr. Newell has 25+ years of experience helping with Moyamoya Disease. Moyamoya disease is a progressive disorder of the cerebral vessel.
I am a 30 year old female, just had a 4 vessel cerebral angiogram and was diagnosed with a 2mm aneurysm on the right side of the brain. I was told I would have to be followed every 2 years to make sur...
Three weeks ago she had a cerebral angiogram done. That is a artery study of her brain. The purpose is to look at the brain and see if there is any other problems with the arteries and does she have good blood flow and also does she have the brain disease MoyaMoya which is what they think she has. The procedure was about and hour and half. She did great while she was under but in recovery she had to lay still for 4 hours to make sure the artery in her leg/groin area clotted and there was no bleeding. For a 2 year old to lay still is impossible, so she was heavily sedated and slept really well. She would try to roll and we (Dan or I) would put a hand on her leg to stop her. A week later Dan and I meet with her neuro-surgeon for the results. Her brain looks really good and the arteries look great and so does the blood flow. Of course there is a but to the story and that is there are some abnormalities on the brain. There are new tiny new arteries that are forming and the Doctor does not know why. ...
Rapid sequence CT imaging provides information about the vascular anatomy (CT angiography), locates major vessels encased by tumor, and eliminates the possibility of avascular lesions in the differential diagnosis of a head and neck tumor. Furthermore the use of density-time curves allows arterial and venous time. The patterns of density-time curves are characteristic for various lesions. For glomus complex tumors, regardless of the size and location, dynamic CT easily differentiates them from most of the simulating lesions. Angiography therefore is occasionally necessary for verification. Dynamic CT has a risk of complications the same as that of any intravenous injection of contrast material. Cerebral angiography via the femoral approach has been reported to have a risk of major complications of 0.28% and of minor complications of 6.25%.
The mechanisms by which intracranial aneurysms develop, enlarge, and rupture are unknown, and it remains difficult to collect the longitudinal patient-based information needed to improve our understanding. We submit, therefore, that mathematical models hold promise by allowing us to propose and test competing hypotheses on potential mechanisms of aneurysmal enlargement and to compare predicted outcomes with limited clinical information-in this way, we may begin to narrow the possible mechanisms and thereby focus experimental studies. In this paper, we present a constrained mixture model of evolving thin-walled, fusiform aneurysms and compare multiple competing hypotheses with regard to the production, removal, and alignment of the collagen that provides the structural integrity of the wall. The results show that this type of approach has the capability to infer potential means by which lesions enlarge and whether such changes are likely to produce a stable or unstable process. Such information ...
Endovascular therapy (group two) received a lower dose (0.09mg per kg bolus and 0.54mg/kilogram infusion over 40 minutes, maximum dose 53.6mg) or after Amendment #5, a standard dose of IV rt-PA (.9mg/kg with 10% as a bolus and the remainder over one hour) and then underwent an angiogram test (cerebral angiography) right after the medicine was given to check for blood clots. If a clot was not seen, then no more treatment was given. If a clot was seen, the neurointerventionalist chose (based on the location and extent of the blood clot) a protocol approved endovascular treatment given directly in the brain artery that would be most effective in reopening the blocked artery ...
CT angiography (CTA) - BRAIN answers are found in the Guide to Diagnostic Tests powered by Unbound Medicine. Available for iPhone, iPad, Android, and Web.
CT angiography combines a CT scan with the injection of dye. This technique is able to create pictures of the blood vessels in your belly or pelvis area.
Dr. Peter Nakaji in Phoenix, AZ, treats Moyamoya Disease, a rare cerebrovascular disease caused by blocked arteries at the base of the brain.
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies. ...
Prior to microvascular flap surgery, patients receive a 3-D CT angiography, which gives breast surgeons a high resolution map of the blood vessels.
Given that WSS has been implicated as a stimulus for vessel remodeling and vessel diameter, noninvasive measurement of WSS using QMRA may represent an intriguing method to monitor the efficacy of treatment for cerebral AVMs. Further, this study is important in that it is contrast to the only other study of WSS in AVMs which found identical WSS in the AVM feeders and normal contralateral vessels. The authors contend that their use of QMRA is more accurate than the TCD used in the 1995 study.. ...
A CT Angiogram involves an injection of x-ray dye through a vein in the arm to enhance the vessels, which are then imaged using the CT scanner.
Moyamoya is a disease in which certain arteries in the brain are constricted and blood flow in the brain is blocked by the constriction.
Backghround: To analyze the co-occurrence of atherosclerotic lesions in CT angiograms of extra- and intracranial arteries in patients with cerebral circulation insufficiency.Material and Methods: Extra- and intracranial CTA was performed in 70 patien...
AVM - MedHelps AVM Center for Information, Symptoms, Resources, Treatments and Tools for AVM. Find AVM information, treatments for AVM and AVM symptoms.
TY - JOUR. T1 - Management of anterior inferior cerebellar artery aneurysms. T2 - Endovascular treatment and clinical outcome. AU - Suh, S. H.. AU - Kim, D. J.. AU - Kim, D. I.. AU - Kim, Byungmoon. AU - Chung, T. S.. AU - Hong, C. K.. AU - Jung, J. Y.. PY - 2011/1/1. Y1 - 2011/1/1. N2 - BACKGROUND AND PURPOSE: AICA aneurysms are rare and a challenge to treat surgically. We present our experience of the angiographic results and the clinical outcomes for 9 AICA aneurysms treated by EVT. MATERIALS AND METHODS: Between 1997 and 2009, EVT was attempted for 9 AICA aneurysms. Six patients presented with SAH, and 3 aneurysms were found incidentally. The location of the aneurysms was the proximal AICA in 7 and the distal AICA in 2. Five aneurysms originated from an AICA-PICA variant. Clinical outcomes and procedural complications were evaluated, and angiography was performed 6, 12, and 24 months after embolization to confirm recanalization of the coiled aneurysm. RESULTS: EVT was technically successful ...
SUZUKI, M.T.M. et al. De novo basilar tip aneurysm: Case report and literature review. Neurocirugía [online]. 2011, vol.22, n.3, pp.251-254. ISSN 1130-1473.. The de novo aneurysms are the formation of new aneurysms in a location previously observed to be normal by a cerebral angiography or direct microsurgical exploration. In this report, we present a review of the theme and describe a case of a ruptured de novo basilar tip aneurysm in a patient previously treated with carotid occlusion for a giant intracavernous aneurysm and microsurgical clipping of contralateral posterior communicating artery aneurysm.. Keywords : Basilar artery; De novo aneurysm; Subarachnoid hemorrhage. ...
J Neurosurg 127:725-731, 2017. The study aimed to assess the diagnostic accuracy of 320-detector row nonsubtracted and subtracted volume CT angiography (VCTA) in detecting small cerebral aneurysms (, 3 mm) compared with 3D digital subtraction angiography (3D DSA).. METHODS Six hundred sixty-two patients underwent 320-detector row VCTA and 3D DSA for suspected cerebral aneurysms. Five neuroradiologists independently reviewed VCTA and 3D DSA images. The 3D DSA was considered the reference standard, and the sensitivity, specificity, and accuracy of nonsubtracted and subtracted VCTA in depicting small aneurysms were analyzed. A p value , 0.05 was considered a significant difference.. RESULTS According to 3D DSA images, 98 small cerebral aneurysms were identified in 90 of 662 patients. Nonsubtracted VCTA depicted 90 small aneurysms. Ten small aneurysms were missed, and 2 small aneurysms were misdiagnosed. The missed small aneurysms were located almost in the internal carotid artery, near bone tissue. ...
To identify patients with spontaneous subarachnoid hemorrhage for whom CT angiography alone can exclude ruptured aneurysms. An observational retrospective review was carried out of all consecutive patients with non-traumatic subarachnoid hemorrhage who underwent both CT angiography and catheter angiography to exclude an aneurysm. CT angiography negative cases (no aneurysm) were classified according to their CT hemorrhage pattern as aneurismal, perimesencephalic or as no-hemorrhage. Two hundred and forty-one patients were included. A CT angiography aneurysm detection sensitivity and specificity of 96.4% and 96.0% were observed. All 35 cases of perimesencephalic or no-hemorrhage out of 78 CT angiography negatives also had negative angiography findings. CT angiography is self-reliant to exclude ruptured aneurysms when either a perimesencephalic hemorrhage or no-hemorrhage pattern is identified on the CT within a week of symptom onset.
TY - JOUR. T1 - Understanding and treating moyamoya disease in children. AU - Jodi, L. Smith. PY - 2009/10/13. Y1 - 2009/10/13. N2 - Moyamoya disease, a known cause of pediatric stroke, is an unremitting cerebrovascular occlusive disorder of unknown etiology that can lead to devastating, permanent neurological disability if left untreated. It is characterized by progressive stenosis of the intracranial internal carotid arteries and their distal branches and the nearly simultaneous appearance of basal arterial collateral vessels that vascularize hypoperfused brain distal to the occluded vessels. Moyamoya disease may be idiopathic or may occur in association with other syndromes. Most children with moyamoya disease present with recurrent transient ischemic attacks or strokes. Although there is no definitive medical treatment, numerous direct and indirect revascularization procedures have been used to improve the compromised cerebral circulation, with outcomes varying according to procedure type. ...
TY - JOUR. T1 - Delayed aneurysm regrowth and recanalization after Guglielmi detachable coil treatment. Case report. AU - Mericle, Robert A.. AU - Wakhloo, Ajay K.. AU - Lopes, Demetrius K.. AU - Lanzino, Giuseppe. AU - Guterman, Lee R.. AU - Hopkins, L. Nelson. PY - 1998/7. Y1 - 1998/7. N2 - Guglielmi detachable coil (GDC) treatment for complicated cerebral aneurysms is an attractive option that has become widely accepted in recent years. This technique is usually considered only if the patient harbors an aneurysm that is not a good candidate for surgical clipping. However, the definition of surgical candidate varies among institutions, and many patients worldwide are being treated with GDCs as primary therapy. Although most centers currently perform follow-up angiography at 6 months to 1 year, others do not routinely perform it after an initially good result. The authors present a case that indicates longer follow up may be necessary and illustrates some of the pitfalls of GDC treatment. ...
Comparisons between digital subtraction angiography and conventional angiography have frequently been made in the radiologic literature, and the high quality and several advantages of the former have been reported. In this study, 101 patients with intracranial aneurysms were examined only by intraarterial digital subtraction angiography; no conventional angiography was used. High-quality images were consistently obtained, facilitating an accurate and definitive diagnosis of intracranial aneurysm. Magnification radiography and stereography using intraarterial digital subtraction angiography were done to obtain a more precise diagnosis. Five small intracranial aneurysms with diameters of 1.0 to 2.0 mm could be detected. The procedure was considered to be as reliable and as safe as conventional angiography, used previously. Important advantages of intraarterial digital subtraction angiography include reduced procedural time and decreased contrast agent burden, factors that will ensure broader ...
Occipital lobe infarcts are traditionally attributed to vertebrobasilar disease. However, anatomical studies indicate that in some people the supply of the posterior cerebral artery is via the carotid system. Jongen et al., retrospectively studied 212 conventional four-vessel cerebral angiograms. Eighteen subjects were excluded beforehand, because of vascular abnormalities causing important hemodynamic changes. They determined whether a fetal variant was present, and in other cases whether there was a functioning posterior communicating artery. In 11 % of hemispheres the posterior cerebral artery was exclusively supplied by the internal carotid artery; in a further 46 % of hemispheres the internal carotid artery might contribute, via a patent posterior communicating artery. In 75 % of subjects the internal carotid artery contributed in at least one hemisphere to the blood flow of the posterior cerebral artery. The implication of the findings is that an occipital lobe infarct can be caused by ...
Currently, the treatment of blood blister-like aneurysms (BBAs) of the supraclinoid internal carotid artery (ICA) is challenging and utilizes many therapeutic methods, including direct clipping and suturing, clipping after wrapping, clipping after suturing, coil embolization, stent-assisted coil embolization, multiple overlapping stents, flow-diverting stents, covered stents, and trapping with or without bypass. In these therapeutic approaches, the optimal treatment method for BBAs has not yet been defined based on the current understanding of BBAs of the supraclinoid ICA. Therefore, in this study, we aimed to review the literature from PubMed to discuss and analyze the pros and cons of the above approaches while adding our own viewpoints to the discussion. Among the surgical methods, direct clipping was the easiest method if the compensation of the collateral circulation of the intracranial distal ICA was sufficient or direct clipping did not induce stenosis in the parent artery. In addition, ...
Cerebral vasospasm is a potentially incapacitating or lethal complication in patients with aneurysmal subarachnoid hemorrhage (SAH). The development of effective preventative and therapeutic interventions has been largely hindered by the fact that the underlying pathogenic mechanisms of cerebral vas …
NECROSIS occurring in the ANTERIOR CEREBRAL ARTERY system, including branches such as Heubners artery. These arteries supply blood to the medial and superior parts of the CEREBRAL HEMISPHERE, Infarction in the anterior cerebral artery usually results in sensory and motor impairment in the lower body ...
Pulmonary embolism (PE) is a blockage of the main pulmonary artery or one of its branches by a substance that has travelled from elsewhere in the body through the bloodstream (embolism). Pulmonary embolism (PE) is the third most common cause of cardiovascular related mortality. Numerous diagnostic tools have been utilized in order to improve diagnosis and prompt appropriate treatment. Since the first introduction of Computed Tomography (CT) angiography in the setting of PE diagnosis algorithm, it has rapidly become as the first choice among imaging techniques. However, still there is long way to improve the abilities and lowering the possible hazards and problems. The purpose of this review is to evaluate and summarize the role of imaging tools in diagnosis of PE in suspected patients, with particular focus on CT angiography. We studied different areas related benefits, disagreements and challenges in utilizing CT angiography in the setting of PE diagnosis algorithm. Although CT angiography is still
Out of 163 patients enrolled in the study, 74 patients (45.5%) had partial recanalization (AOL 2) on post-procedural angiography. Rates of favorable clinical outcomes at 3 months (defined as mRS of 2 or less) did not differ between the group with partial (AOL 2) versus complete recanalization (AOL 3). Forty patients (24.5%) in the study were determined to have IST as their stroke etiology, and all of these patients had residual stenosis present on the post-procedural angiogram (AOL 2). 27% of patients with partial recanalization compared to only 1.1% of patients with complete recanalization developed instant reocclusion during EVT. In addition, those patients with partial recanalization during EVT were more likely to have worse stenosis or occlusion (10.8% vs 1.1%) on follow-up imaging. On multivariable regression analysis, delayed reocclusion in patients with partial recanalization was predicted by excellent baseline collateral-flow (OR 8.477; 95%CI 1.169-61.464) and neurological worsening ...
To evaluate the haemodynamic changes induced by flow diversion treatment in cerebral aneurysms, resulting in thrombosis or persisting aneurysm patency over time. Eight patients with aneurysms at the para-ophthalmic segment of the internal carotid artery were treated by flow diversion only. The clinical follow-up ranged between 6 days and 12 months. Computational fluid dynamics (CFD) analysis of pre- and post-treatment conditions was performed in all cases. True geometric models of the flow diverter were created and placed over the neck of the aneurysms by using a virtual stent-deployment technique, and the device was simulated as a true physical barrier. Pre- and post-treatment haemodynamics were compared, including mean and maximal velocities, wall-shear stress (WSS) and intra-aneurysmal flow patterns. The CFD study results were then correlated to angiographic follow-up studies. Mean intra-aneurysmal flow velocities and WSS were significantly reduced in all aneurysms. Changes in flow patterns were
Moyamoya disease: Find the most comprehensive real-world symptom and treatment data on moyamoya disease at PatientsLikeMe. 24 patients with moyamoya disease experience fatigue, depressed mood, pain, anxious mood, and insomnia and use Aspirin and MRI (magnetic resonance imaging) to treat their moyamoya disease and its symptoms.
Background: Flow diversion (FD)-a young technique using stents with highly increased surface coverage-was introduced to treat complex aneurysms without intra-aneurysmal material placement and has amended the spectrum of endovascular techniques such as stent-assisted coil occlusion considerably. However, ischemic complications, a common side effect in FD, occur more frequently compared with the conventional endovascular approaches and certainly limit the indication of this technique. Our study aimed to investigate the feasibility and efficacy of stent-assisted coiling using low profile self-expandable stents, which exhibit only moderate flow-redirecting properties and therefore represent a combination of hemodynamic endovascular and occlusive endosaccular therapy ...
Sherwood said she will take advantage of her fellowship to make a series of mixed-media paintings incorporating digital images of cerebral angiograms - including her own - with copies of images of neuroanatomy produced by 16th-century anatomist Andreas Vesalius and artist Jan Stefan van Kalkar. "The simultaneous use of these widely disparate views suggests two revolutionary moments in our understanding and representations of the brain," wrote Sherwood in her Guggenheim proposal. Those moments, she said, are the advent of a Western medical "humanism" that underscored the importance of understanding through dem-onstration and late-20th-century advances in medical technology that rely on a dematerialized, remote image of the human body.. "The purpose of this body of work is to reapply the use of such images towards an exploration of the spiritual vis-a-vis medical imaging technologies," Sherwood said in her proposal.. She said the work also will expand her research for "Art, Medicine, and ...
Computed Tomography Angiography (CTA) plays an essential role in the diagnosis, treatment evaluation, and monitoring of cerebral aneurysms. Segmentation of CTA medical images of giant intracranial aneurysms (GIA) provides quantitative measurements of
References: Avci E, Fossett D, Aslan M, Attar A, Egemen N. Branches of the anterior cerebral artery near the anterior communicating artery complex: an anatomic study and surgical perspective. Neurol Med Chir (Tokyo). 2003 Jul;43(7):329-33; discussion 333. Review. ...
BACKGROUND: Anterior inferior cerebellar artery (AICA) can present with a myriad of variations. However, the previous studies of AICA anatomy were based on small-scale cadaveric investigation. In this study, we performed an angiographic study of AICA in 500 Chinese with Han nationality based on digital subtraction angiography (DSA). METHODS: Patients admitted to our institution between 2015 and 2018 who had underwent DSA were potential candidates for this retrospective evaluation. The exclusion criteria were: a) patients with vascular diseases of the posterior circulation; b) ischemic diseases or moyamoya disease of the anterior circulation. RESULTS: Five hundred patients were identified. The patients ranged in age from 6 to 75 years. Two hundred thirty-seven (62.9%, 237 of 377) patients had bilateral AICAs at the same level, and 140 (37.1%, 140 of 377) had bilateral AICAs at different levels. The developing states of AICA were grade 0 in 31 (3.5%, 31 of 896), grade 1 in 373 (41.6%, 373 of 896), ...
Conventional angiography is the diagnostic standard for determining the presence, location and severity of heart disease. An EB, CT, EBT Angiography are different forms of angiographies that offers similar results if a convetional angiography is not necessary. Find an angiography clinic facility in your area.
Background and Purpose-The purpose of the present study was to calculate the prevalence and relative risk of unruptured incidental intracranial aneurysms IAs among families with IA cases compared with the general population in one geographically defined area in East Finland and to identify the risk group that could benefit most from screening...
Although the 5-F catheter is reputed to cause less vascular trauma than larger catheters, subintimal injections of contrast material have occurred following intimal damage by the catheter tip. Microscopic studies of the tips of two widely used 5-F polyethylene catheters have revealed a difference in configuration resulting in one of the catheters becoming markedly damaged during angiography. The authors make recommendations for finishing and protecting the catheter tip. ...
An aneurysm is classified as an abnormal enlargement of the arteries. If left untreated, an aneurysm can rupture and be fatal. Aneurysms oftentimes do not display symptoms, but when they do, they manifest in the form of blurred vision, drooping eyelids, dilated pupils, and weakness or numbness on one or both sides of the body. In order to look for an aneurysm, doctors will have the option to perform a variety of different tests. CT scans will often be the first performed to see if you have bleeding sections in your brain. Afterwards, you may need to have a cerebrospinal fluid test done, which is only performed depending on what can help narrow down the symptoms. Other tests can include having an MRI performed or a cerebral angiogram, which will help the doctor analyze the condition of your brain without the use of larger machinery.. At Metroview Vascular, we diagnose aneurysms and offer treatment options including open surgery, or stent-graft. These procedures are performed in the ...
A cerebral aneurysm (also called an intracranial aneurysm or brain aneurysm) is a bulging, weakened area in the wall of an artery in the brain, resulting in an abnormal ballooning of the artery that is at risk for rupturing.
Role of bedside microdialysis in the diagnosis of cerebral vasospasm following aneurysmal subarachnoid hemorrhage. Unterberg, AW; Sakowitz, OW; Sarrafzadeh, AS; et al.. JOURNAL OF NEUROSURGERY / 94 / 740-749, 2001. DOI: 10.3171/jns.2001.94. ...
Subarachnoid hemorrhage (SAH) is often a devastating event with a high mortality and morbidity. Most subarachnoid hemorrhages (SAH) are caused by ruptured intracranial saccular aneurysms. In most cases, the presence of the aneurysm is unsuspected unt
The understanding of vascular anatomy of kidneys has gained remarkable significance in both medical and surgical disciplines. The science of r enal transplantation intensifies a need for recognizing the variation in renal vascular anatomy in different population and ethnicities. CT angiography is a less invasive modality for assessing the renal vascular anatomy of potential kidney donors as not e very healthy person wishing to donate kidney is a suitable candidate for this highly specialized procedure. Difficulty in surgical anastomosis of vessels has been reported because of anatomical complexity. There is diversity in anatomical variation in diff erent population, ethnic group and geography. In Kenya not much work has been done in this area using living donors. The aim of this study was set to determine the prevalence of renal accessory arteries among African adults in Kenya and establish the kidne y side commonly presents with accessory arteries. The study was a three - year cross sectional ...
After the procedure, you will be observed for a period of time. If your brain imaging prior to the Gamma Knife procedure was a cerebral angiogram, you will need to lie still with the affected leg straight for a few hours until the catheter insertion site in the groin is no longer bleeding.. Once you are able to take liquids by mouth, the IV line will be removed. You may take liquids and solid foods as tolerated.. You may feel some discomfort after the procedure, such as a headache or nausea. Let your nurse know if you are uncomfortable, so that you may be given medication and/or other treatment.. The Gamma Knife procedure is generally performed on an outpatient basis, so you most likely will be allowed to go home at the end of the day. You will need to have someone drive you home, however. If necessary, you may be admitted to the hospital for overnight observation.. Once you are home, you may resume your normal diet, medications, and activities, unless your physician instructs you differently. ...
A parent vessel lies adjacent heart tissue, and a restriction in the parent vessel is bypassed. A first region of the parent vessel on a first side of the restriction is accessed and an aperture is formed therein. A lumen is formed through the heart tissue, and the lumen communicates with the parent vessel through the first aperture. A second aperture is formed in a second region of the parent vessel on a second side of the restriction. The lumen through the heart tissue communicates with the parent vessel through the first and second apertures, thus bypassing the restriction.
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CT - Angiograms - Thoracic aorta angiogram is a way of looking at the blood vessels in different parts of your body. Learn more about this procedure.
Linfante, Italo, "How Do I Decide Between Coiling and Flow Diversion for Intracranial Aneurysms?" (2016). All Publications. 1263 ...
TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents ...
Oak Brook, Ill. (PRWEB) February 19, 2013 -- Coronary computed tomography angiography (CCTA) is an effective tool for determining the risk of heart attacks and
Learn more about Computed Tomography Angiography at St. Davids HealthCare DefinitionReasons for TestPossible ComplicationsWhat to ExpectCall Your Doctorrevision ...
known since 1995 (this lesion is monitored by periodic ecographies and abdominal CT angiography performed in August, 2007); ... high blood pressure . Examinations : ecographies , abdominal CT angiography, cardiac ... ecographies , abdominal CT angiography, cardiac .... ...
CT Angiography and Magnetic Resonance Angiography MRA and CTA are considered noninvasive imaging methods to visualize arterial and venous structures with out the need for direct placement of a catheter into a patients vessel of interest. The benefit to the patient is that CTA and MRA may be no more uncomfortable than placement of an…
The rhesus monkey (Macaca mulatta) is conventional for biomedical and mental reports. consequently, an incredible fund of clinical details comes in papers and a few gathered facts. This booklet is mostly a suite of knowledge from over 2000 papers on rhesus monkey. It covers subject matters at the cerebral angiography, electrocardiogram, and vector cardiogram of the rhesus monkey. It additionally offers more information on morphology and serve as of rhesus kidney; the improvement and eruption of tooth in rhesus; and the histology and histochemistry of the rhesus monkey ...
We are very pleased with the exceptional results from this landmark trial. It continues to validate findings from previous multicentre and single-centre trials, which is that the HydroCoil system provides excellent results in reducing aneurysm recurrence and retreatment in a wide range of cerebral aneurysms as compared to bare platinum coils," said Richard Cappetta, president and CEO, MicroVention-Terumo.. Procedural safety and efficacy results for HELPS, previously published in 2008, found that the. HydroCoil system can be safely used in a wide spectrum of aneurysms with a risk profile equivalent to thatof bare platinum coils.. Since the HELPS patient enrolment was completed in February 2007, MicroVention-Terumo has continued to innovate the HydroCoil line of coils, including the HydroSoft finishing coil for filling small spaces that provides hydrogel at the neck of the aneurysm, and the HydroFrame framing coil that provides optimal framing of the aneurysm with the clinical benefits of ...
A 40-year-old man with mutism developed after clipping a left distal anterior cerebral artery aneurysm is presented. The most characteristic presenting symptom was complete absence of speech with unimpaired consciousness which occured on the fourth day after operation. The patient recovered spontaneously within three weeks. ...
TY - JOUR. T1 - Distal anterior inferior cerebellar artery aneurysms. T2 - Report of four cases. AU - Zager, Eric L.. AU - Shaver, Ellen G.. AU - Hurst, Robert W.. AU - Flamm, Eugene S.. PY - 2002/9. Y1 - 2002/9. N2 - Aneurysms of the distal anterior inferior cerebellar artery (AICA) are rare; fewer than 100 cases have been reported. The authors detail their experience with four cases and present endovascular as well as microsurgical management options. The medical records and neuroimaging studies obtained in four patients who were treated at a single institution were reviewed. Clinical presentations, neuroimaging and intraoperative findings, and clinical outcomes were analyzed. There were three men and one woman; their mean age was 43 years. Two patients presented with acute subarachnoid hemorrhage (SAH), and two presented with ataxia and vertigo (one with tinnitus, the other with hearing loss). Angiographic studies demonstrated aneurysms of the distal segment of the AICA. In one patient with ...
Details of the image Right middle cerebral artery territory infarct from right internal carotid artery dissection Modality: CT (non-contrast)
OBJECT The authors report their preliminary experience using a balloon-assisted technique (BAT) in the transarterial embolization of intracranial dural arteriovenous fistulas (DAVFs). METHODS The authors reviewed the prospectively collected data obtained in 7 consecutive patients with DAVFs in whom embolization was achieved using transarterially injected Onyx with either the venous or arterial BAT. Procedures were performed at the Division of Interventional Neuroradiology at the University of California at Los Angeles Medical Center between September 2005 and January 2008. RESULTS Three patients presented with cortical venous reflux and 4 did not. Three patients underwent transarterial Onyx-based embolization combined with transvenous balloon protection; the balloon was inflated in the transverse sinus in 2 of these patients and in the superior sagittal sinus in the third. One of them underwent an additional transarterial Onyx embolization with arterial BAT, whereas 4 other patients were treated
Looking for online definition of posterior inferior cerebellar artery syndrome in the Medical Dictionary? posterior inferior cerebellar artery syndrome explanation free. What is posterior inferior cerebellar artery syndrome? Meaning of posterior inferior cerebellar artery syndrome medical term. What does posterior inferior cerebellar artery syndrome mean?

Cerebral Venous Sinus Thrombosis (CVST)Cerebral Venous Sinus Thrombosis (CVST)

... occurs when a blood clot forms in the brains venous sinuses. This prevents blood from ... Cerebral Venous Sinus Thrombosis (CVST). What is cerebral venous sinus thrombosis?. Cerebral venous sinus thrombosis (CVST) ... Key points about cerebral venous sinus thrombosis. * Cerebral venous sinus thrombosis (CVST) occurs when a blood clot forms in ... What are the symptoms of cerebral venous thrombosis?. Symptoms of cerebral venous sinus thrombosis may vary, depending on where ...
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Adult primary central nervous system vasculitis treatment and course: analysis of one hundred sixty-three patients | Archivio...Adult primary central nervous system vasculitis treatment and course: analysis of one hundred sixty-three patients | Archivio...

... diagnosis by angiography (HR 3.28), cerebral infarction (HR 4.44), and large vessel involvement (HR 4.98), while reduced ... and cerebral infarctions (OR 3.74), while lower disability scores were associated with gadolinium-enhanced cerebral lesions or ... Prominent gadolinium-enhanced cerebral lesions or meninges were linked with continued treatment at the last followup encounter ... and cerebral infarcts at the time of diagnosis (OR 3.32) were associated with a poor response to treatment. ...
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Cerebral angiography: MedlinePlus Medical EncyclopediaCerebral angiography: MedlinePlus Medical Encyclopedia

Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ... Cerebral angiography (cerebral angiogram) - diagnostic. In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic ... Angiography with a catheter is used less often now. This is because MRA (magnetic resonance angiography) and CT angiography ... Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ...
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Cerebral Angiography | SpringerLinkCerebral Angiography | SpringerLink

The history of cerebral angiography is discussed, extending from the first human angiogram in 1927 to the present time.... ... This chapter covers the essential aspects of diagnostic cerebral angiography. ... This chapter covers the essential aspects of diagnostic cerebral angiography. The history of cerebral angiography is discussed ... Cloft HJ, Joseph GJ, Dion JE (1999) Risk of cerebral angiography in patients with subarachnoid hemorrhage, cerebral aneurysm, ...
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Cerebral Angiography (Angiogram)Cerebral Angiography (Angiogram)

Current and accurate information for patients about Cerebral Angiography. Learn what you might experience, how to prepare for ... Cerebral Angiography. Cerebral angiography uses a catheter, x-ray imaging guidance and an injection of contrast material to ... What is Cerebral Angiography. Angiography is a minimally invasive medical test that uses x-rays and an iodine-containing ... Cerebral angiography is also called intra-arterial digital subtraction angiography (IADSA). This phrase refers to acquiring the ...
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Cerebral AngiographyCerebral Angiography

... on WN Network delivers the latest Videos and Editable pages for News & Events, including Entertainment, ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... Based on procedure, the market is segmented into coronary angiography, peripheral angiography, cerebral angiography, vascular ...
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Cerebral Angiography | SpringerLinkCerebral Angiography | SpringerLink

This revised and enlarged edition of Cerebral Angiography, which includes new angiographic studies and illustrative drawings, ... This revised and enlarged edition of Cerebral Angiography, which includes new angiographic studies and illustrative drawings, ... While the emphasis throughout is on the diagnostic value of cerebral angiography, many examples of endovascular treatment in ... Atherosclerosis Cerebral Vessels Endovacular Treatment Occlusive Diseases Vascular Abnormalities Venous Thrombosis Authors and ...
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Cerebral angiography | University of Maryland Medical CenterCerebral angiography | University of Maryland Medical Center

Cerebral angiography. Definition. Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to ... Cerebral angiography is most often used to identify or confirm problems with the blood vessels in the brain. ... Angiography with a catheter is used less often now. This is because MRA (*magnetic resonance angiography ... Vertebral angiogram; Angiography - head; Carotid angiogram; Cervicocerebral catheter-based angiography; Intra-arterial digital ...
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Cerebral Angiography OnlineCerebral Angiography Online

... on WN Network delivers the latest Videos and Editable pages for News & Events, including ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... In addition, cerebral angiography allows certain treatments to be performed immediately, based on its findings. If, for example ... For some applications this method may yield better images than less invasive methods such as computed tomography angiography ...
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Cerebral AngiographyCerebral Angiography

A. Sharath Reddy at MaxCure Hospitals Hyderabad India, Angiogram: What I wish Id known before the procedure, Cerebral ... Diagnostic Cerebral Angiography, Live Angiography (CAG) by Dr. ... Cerebral angiography. Cerebral angiography is a form of ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... Cerebral Angiography Procedure. Cerebral Angiography Procedure. Digital subtraction angiography (DSA) is a fluoroscopy ...
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Diagnostic Cerebral AngiographyDiagnostic Cerebral Angiography

... and technique of vertebral artery catheterization ... Diagnostic Cerebral Angiography, The Angiogram Procedure, Endovascular Coiling for Brain Aneurysm, Femoral artery access- ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ... Cerebral angiography. Cerebral angiography is a form of angiography which provides images of blood vessels in and around the ...
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5-F catheter in cerebral angiography (Journal Article) | SciTech Connect5-F catheter in cerebral angiography (Journal Article) | SciTech Connect

... have revealed a difference in configuration resulting in one of the catheters becoming markedly damaged during angiography. The ...
more infohttps://www.osti.gov/scitech/biblio/5799471

Cerebral Angiography - Stock Image C003/4771 - Science Photo LibraryCerebral Angiography - Stock Image C003/4771 - Science Photo Library

Color enhanced medicine radiology angiography showing normal blood vessels in the brain. (Enhancement of GA3404) - Stock Image ... Keywords: angiography, arteriography, blood vessel, brain, brain angiography, cardiovascular, cardiovascular system, cerebral, ... Caption: Color enhanced medicine radiology angiography showing normal blood vessels in the brain. (Enhancement of GA3404) ... cerebral angiograph, circulatory system, medical, medical imaging, nervous system, x ray, x-ray, xray ...
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Neurologic complications of cerebral angiography. | American Journal of NeuroradiologyNeurologic complications of cerebral angiography. | American Journal of Neuroradiology

Neurologic complications of cerebral angiography.. J E Heiserman, B L Dean, J A Hodak, R A Flom, C R Bird, B P Drayer, E K Fram ... Neurologic complications of cerebral angiography.. J E Heiserman, B L Dean, J A Hodak, R A Flom, C R Bird, B P Drayer, E K Fram ... Neurologic complications of cerebral angiography.. J E Heiserman, B L Dean, J A Hodak, R A Flom, C R Bird, B P Drayer and E K ... Neurologic complications of cerebral angiography. Message Subject (Your Name) has sent you a message from American Journal of ...
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Front View Cerebral Angiography Monitoring Stock Video & More Clips of Aneurysm 976881780 | iStockFront View Cerebral Angiography Monitoring Stock Video & More Clips of Aneurysm 976881780 | iStock

Download this Front View Cerebral Angiography Monitoring video now. And search more of iStocks library of royalty-free stock ... Front view cerebral angiography monitoring. - Stock video. .... Ukraine, Aneurysm, Arteriogram, Artery, Atherosclerosis. ...
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Cerebral angiography | The Journal of the American Osteopathic AssociationCerebral angiography | The Journal of the American Osteopathic Association

Cerebral angiography You will receive an email whenever this article is corrected, updated, or cited in the literature. You can ... Cerebral angiography. The Journal of the American Osteopathic Association, March 1957, Vol. 56, 410-412. doi:https://doi.org/ ... RUBERG R. Cerebral angiography. J Am Osteopath Assoc 1957;56(7):410-412. doi: https://doi.org/. ...
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Black And White Cerebral Angiography Scan Stock Video - Download Video Clip Now - iStockBlack And White Cerebral Angiography Scan Stock Video - Download Video Clip Now - iStock

Download this Black And White Cerebral Angiography Scan video now. And search more of iStocks library of royalty-free stock ... Black and white cerebral angiography scan stock video. .... Ukraine, Aneurysm, Arteriogram, Artery, Atherosclerosis. ...
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Digital Intravenous Cerebral Angiography | (1981) | Seeger |  Publications | SpieDigital Intravenous Cerebral Angiography | (1981) | Seeger | Publications | Spie

Digital Intravenous Cerebral Angiography Author(s): Joachim F. Seeger; Raymond F. Carmody; Janice R. L. Smith; Theron W. Ovitt ... Initial studies have been directed toward digital video subtraction angiography (DVSA) using intravenous injections of contrast ...
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Transradial Cerebral Angiography: Technique and Outcomes | American Journal of NeuroradiologyTransradial Cerebral Angiography: Technique and Outcomes | American Journal of Neuroradiology

Transradial Cerebral Angiography: Technique and Outcomes Message Subject (Your Name) has sent you a message from American ... Transradial Cerebral Angiography: Technique and Outcomes. Alison M. Nohara and David F. Kallmes ... Transradial approach for diagnostic selective cerebral angiography: results of a consecutive series of 166 cases. AJNR Am J ... The purpose of this report was to offer detailed procedural methods for transradial cerebral angiography to facilitate adoption ...
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Cerebral angiography in children | The Journal of the American Osteopathic AssociationCerebral angiography in children | The Journal of the American Osteopathic Association

Cerebral angiography in children. The Journal of the American Osteopathic Association, December 1972, Vol. 72, 390. doi:https ... Cerebral angiography in children You will receive an email whenever this article is corrected, updated, or cited in the ... Cerebral angiography in children. J Am Osteopath Assoc 1972;72(4):390. doi: https://doi.org/. ...
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Cerebral angiography | Multimedia Encyclopedia | Health Information | St. Lukes HospitalCerebral angiography | Multimedia Encyclopedia | Health Information | St. Luke's Hospital

Cerebral angiography. Vertebral angiogram; Angiography - head; Carotid angiogram; Cervicocerebral catheter-based angiography; ... Angiography with a catheter is used less often now. This is because MRA ( magnetic resonance angiography ) and CT angiography ... Cerebral angiography is a procedure that uses a special dye (contrast material) and x-rays to see how blood flows through the ... Cerebral angiography is most often used to identify or confirm problems with the blood vessels in the brain. ...
more infohttps://www.stlukes-stl.com/health-content/health-ency-multimedia/1/003799.htm

Cerebral angiography - WikipediaCerebral angiography - Wikipedia

Cerebral angiography is a form of angiography which provides images of blood vessels in and around the brain, thereby allowing ... cerebral angiography may yield better images than less invasive methods such as computed tomography angiography and magnetic ... In some jurisdictions, cerebral angiography is required to confirm brain death.[citation needed] Prior to the advent of modern ... In addition, cerebral angiography allows certain treatments to be performed immediately, based on its findings. If, for example ...
more infohttps://en.wikipedia.org/wiki/Cerebral_angiography

Transcranial Doppler correlation with cerebral angiography in sickle cell disease. | StrokeTranscranial Doppler correlation with cerebral angiography in sickle cell disease. | Stroke

Transcranial Doppler correlation with cerebral angiography in sickle cell disease.. R J Adams, F T Nichols, R Figueroa, V McKie ... Transcranial Doppler correlation with cerebral angiography in sickle cell disease.. R J Adams, F T Nichols, R Figueroa, V McKie ... Transcranial Doppler correlation with cerebral angiography in sickle cell disease.. R J Adams, F T Nichols, R Figueroa, V McKie ... we compared transcranial Doppler and cerebral angiography in a primarily young, symptomatic group of 33 patients (18 males and ...
more infohttp://stroke.ahajournals.org/content/23/8/1073

Heparin and Air Filters Reduce Embolic Events Caused by Intra-Arterial Cerebral Angiography | CirculationHeparin and Air Filters Reduce Embolic Events Caused by Intra-Arterial Cerebral Angiography | Circulation

Clinically silent cerebral lesions after cerebral catheter angiography. Rofo. 2001; 173: 300-305. ... Figure 1. MESs during intra-arterial cerebral angiography. Transcranial Doppler sonography of both middle cerebral arteries ... cerebral angiography and transcranial Doppler sonography during angiography were used to evaluate the frequency of cerebral ... 25 A large number of microembolic signals in the cerebral vessels has been described not only during cerebral angiography9 but ...
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What is the role of catheter cerebral angiography in the evaluation of posterior cerebral artery (PCA) stroke?What is the role of catheter cerebral angiography in the evaluation of posterior cerebral artery (PCA) stroke?

Catheter cerebral angiography remains the criterion standard for evaluation of vascular anatomy. However, it is a more invasive ... Drugs & Diseases , Neurology , Posterior Cerebral Artery Stroke Q&A What is the role of catheter cerebral angiography in the ... encoded search term (What is the role of catheter cerebral angiography in the evaluation of posterior cerebral artery (PCA) ... and What is the role of catheter cerebral angiography in the evaluation of posterior cerebral artery (PCA) stroke? What to Read ...
more infohttps://www.medscape.com/answers/2128100-78590/what-is-the-role-of-catheter-cerebral-angiography-in-the-evaluation-of-posterior-cerebral-artery-pca-stroke
  • Dr. Michael Chen , MD, a neurointerventionalist at Rush University Medical Center , discusses cerebral angiograms. (wn.com)
  • METHODS: Bilateral cerebral angiograms with antero-posterior, lateral and oblique frontal views were obtained in 100 neurological patients aged from 5 to 90 years. (uzh.ch)
  • Seven of the dissections were noted at the time of contrast material injection for the filming of cerebral angiograms. (elsevier.com)
  • The history of cerebral angiography is discussed, extending from the first human angiogram in 1927 to the present time. (springer.com)
  • Darren B. Orbach, MD, PhD, Neurointerventional Radiologist at Children's Hospital Boston , explains the process of a cerebral angiogram and the role of image guidance and catheters. (wn.com)
  • abstract = "BACKGROUND AND PURPOSE: Iatrogenic dissections are an uncommon complication of cerebral angiography. (elsevier.com)
  • Microscopic studies of the tips of two widely used 5-F polyethylene catheters have revealed a difference in configuration resulting in one of the catheters becoming markedly damaged during angiography. (osti.gov)
  • Before the angiography, a bolus heparin of 5000 units was administered intravenously and the activated clotting time reached 282 sec. (scirp.org)
  • In some jurisdictions, cerebral angiography is required to confirm brain death. (wikipedia.org)
  • citation needed] Prior to the advent of modern neuoroimaging techniques such as MRI and CT in the mid-1970s, cerebral angiographies were frequently employed as a tool to infer the existence and location of certain kinds of lesions and hematomas by looking for secondary vascular displacement caused by the mass effect related to these medical conditions. (wikipedia.org)
  • However, when they produce unclear findings or more information is needed about the vascular anatomy, angiography is required. (medscape.com)
  • CONCLUSION Cerebral angiography was associated with a 1% overall incidence of neurologic deficit and a 0.5% incidence of persistent deficit. (ajnr.org)
  • Investigators conduct a monocentric pilot study with the objective to determine the hemodynamic parameter of fluorescence angiography (slope, amplitude, saturation time ) best correlated w. (bioportfolio.com)
  • We retrospectively reviewed 12 cases of arterial dissections complicating cerebral angiography and cerebrovascular interventions to evaluate the clinical course of these dissections. (elsevier.com)
  • CONCLUSION: Arterial dissections are an uncommon complication of cerebral angiography and cerebrovascular interventions and usually have a benign clinical course. (elsevier.com)
  • Dion, Jacques E. / Arterial dissections complicating cerebral angiography and cerebrovascular interventions . (elsevier.com)
  • Cerebral angiography is done in the hospital or radiology center. (medlineplus.gov)
  • We conducted a preoperative angiography and a BTO of the right ICA to evaluate collateral flows. (scirp.org)
  • Initial studies have been directed toward digital video subtraction angiography (DVSA) using intravenous injections of contrast material. (spie.org)
  • Onset of 5 of the deficits occurred during angiography, the other 5 (3 persistent) were delayed. (ajnr.org)