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)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.Aneurysm, Infected: Aneurysm due to growth of microorganisms in the arterial wall, or infection arising within preexisting arteriosclerotic aneurysms.Aortic Aneurysm: An abnormal balloon- or sac-like dilatation in the wall of AORTA.Heart Aneurysm: A localized bulging or dilatation in the muscle wall of a heart (MYOCARDIUM), usually in the LEFT VENTRICLE. Blood-filled aneurysms are dangerous because they may burst. Fibrous aneurysms interfere with the heart function through the loss of contractility. True aneurysm is bound by the vessel wall or cardiac wall. False aneurysms are HEMATOMA caused by myocardial rupture.Aortic Aneurysm, Thoracic: An abnormal balloon- or sac-like dilatation in the wall of the THORACIC AORTA. This proximal descending portion of aorta gives rise to the visceral and the parietal branches above the aortic hiatus at the diaphragm.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.Iliac Aneurysm: Abnormal balloon- or sac-like dilatation in the wall of any one of the iliac arteries including the common, the internal, or the external ILIAC ARTERY.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.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.Blood Vessel Prosthesis Implantation: Surgical insertion of BLOOD VESSEL PROSTHESES to repair injured or diseased blood vessels.Cerebral Angiography: Radiography of the vascular system of the brain after injection of a contrast medium.Aortic Rupture: The tearing or bursting of the wall along any portion of the AORTA, such as thoracic or abdominal. It may result from the rupture of an aneurysm or it may be due to TRAUMA.Aneurysm, False: Not an aneurysm but a well-defined collection of blood and CONNECTIVE TISSUE outside the wall of a blood vessel or the heart. It is the containment of a ruptured blood vessel or heart, such as sealing a rupture of the left ventricle. False aneurysm is formed by organized THROMBUS and HEMATOMA in surrounding tissue.Blood Vessel Prosthesis: Device constructed of either synthetic or biological material that is used for the repair of injured or diseased blood vessels.Aorta, Abdominal: The aorta from the DIAPHRAGM to the bifurcation into the right and left common iliac arteries.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.Tomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Endovascular Procedures: Minimally invasive procedures, diagnostic or therapeutic, performed within the BLOOD VESSELS. They may be perfomed via ANGIOSCOPY; INTERVENTIONAL MAGNETIC RESONANCE IMAGING; INTERVENTIONAL RADIOGRAPHY; or INTERVENTIONAL ULTRASONOGRAPHY.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.Aortography: Radiographic visualization of the aorta and its branches by injection of contrast media, using percutaneous puncture or catheterization procedures.Vascular Surgical Procedures: Operative procedures for the treatment of vascular disorders.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.Surgical Instruments: Hand-held tools or implements used by health professionals for the performance of surgical tasks.Stents: Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.Angiography: Radiography of blood vessels after injection of a contrast medium.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.Prosthesis Design: The plan and delineation of prostheses in general or a specific prosthesis.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.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.Retrospective Studies: Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.Carotid Artery, Internal: Branch of the common carotid artery which supplies the anterior part of the brain, the eye and its appendages, the forehead and nose.Iliac Artery: Either of two large arteries originating from the abdominal aorta; they supply blood to the pelvis, abdominal wall and legs.Neurosurgical Procedures: Surgery performed on the nervous system or its parts.Endoleak: Postoperative hemorrhage from an endovascular AORTIC ANEURYSM repaired with endoluminal placement of stent grafts (BLOOD VESSEL PROSTHESIS IMPLANTATION). It is associated with pressurization, expansion, and eventual rupture of the aneurysm.Aortitis: Inflammation of the wall of the AORTA.Platinum: Platinum. A heavy, soft, whitish metal, resembling tin, atomic number 78, atomic weight 195.09, symbol Pt. (From Dorland, 28th ed) It is used in manufacturing equipment for laboratory and industrial use. It occurs as a black powder (platinum black) and as a spongy substance (spongy platinum) and may have been known in Pliny's time as "alutiae".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.Polyethylene Terephthalates: Polyester polymers formed from terephthalic acid or its esters and ethylene glycol. They can be formed into tapes, films or pulled into fibers that are pressed into meshes or woven into fabrics.Splenic Artery: The largest branch of the celiac trunk with distribution to the spleen, pancreas, stomach and greater omentum.Angioplasty: Reconstruction or repair of a blood vessel, which includes the widening of a pathological narrowing of an artery or vein by the removal of atheromatous plaque material and/or the endothelial lining as well, or by dilatation (BALLOON ANGIOPLASTY) to compress an ATHEROMA. Except for ENDARTERECTOMY, usually these procedures are performed via catheterization as minimally invasive ENDOVASCULAR PROCEDURES.Reoperation: A repeat operation for the same condition in the same patient due to disease progression or recurrence, or as followup to failed previous surgery.Balloon Occlusion: Use of a balloon CATHETER to block the flow of blood through an artery or vein.Renal Artery: A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters.Sinus of Valsalva: The dilatation of the aortic wall behind each of the cusps of the aortic valve.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.Time Factors: Elements of limited time intervals, contributing to particular results or situations.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.Pancreatic Elastase: A protease of broad specificity, obtained from dried pancreas. Molecular weight is approximately 25,000. The enzyme breaks down elastin, the specific protein of elastic fibers, and digests other proteins such as fibrin, hemoglobin, and albumin. EC 3.4.21.36.Cerebral Arteries: The arterial blood vessels supplying the CEREBRUM.Dilatation, Pathologic: The condition of an anatomical structure's being dilated beyond normal dimensions.Retreatment: The therapy of the same disease in a patient, with the same agent or procedure repeated after initial treatment, or with an additional or alternate measure or follow-up. It does not include therapy which requires more than one administration of a therapeutic agent or regimen. Retreatment is often used with reference to a different modality when the original one was inadequate, harmful, or unsuccessful.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.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.Anastomosis, Surgical: Surgical union or shunt between ducts, tubes or vessels. It may be end-to-end, end-to-side, side-to-end, or side-to-side.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.Mesenteric Artery, Superior: A large vessel supplying the whole length of the small intestine except the superior part of the duodenum. It also supplies the cecum and the ascending part of the colon and about half the transverse part of the colon. It arises from the anterior surface of the aorta below the celiac artery at the level of the first lumbar vertebra.Marfan Syndrome: An autosomal dominant disorder of CONNECTIVE TISSUE with abnormal features in the heart, the eye, and the skeleton. Cardiovascular manifestations include MITRAL VALVE PROLAPSE, dilation of the AORTA, and aortic dissection. Other features include lens displacement (ectopia lentis), disproportioned long limbs and enlarged DURA MATER (dural ectasia). Marfan syndrome is associated with mutations in the gene encoding fibrillin, a major element of extracellular microfibrils of connective tissue.Prosthesis Failure: Malfunction of implantation shunts, valves, etc., and prosthesis loosening, migration, and breaking.Foreign-Body Migration: Migration of a foreign body from its original location to some other location in the body.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.Craniotomy: Any operation on the cranium or incision into the cranium. (Dorland, 28th ed)Microsurgery: The performance of surgical procedures with the aid of a microscope.Equipment Design: Methods of creating machines and devices.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.Subclavian Artery: Artery arising from the brachiocephalic trunk on the right side and from the arch of the aorta on the left side. It distributes to the neck, thoracic wall, spinal cord, brain, meninges, and upper limb.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.Aorta, Thoracic: The portion of the descending aorta proceeding from the arch of the aorta and extending to the DIAPHRAGM, eventually connecting to the ABDOMINAL AORTA.Mucocutaneous Lymph Node Syndrome: An acute, febrile, mucocutaneous condition accompanied by swelling of cervical lymph nodes in infants and young children. The principal symptoms are fever, congestion of the ocular conjunctivae, reddening of the lips and oral cavity, protuberance of tongue papillae, and edema or erythema of the extremities.Risk Assessment: The qualitative or quantitative estimation of the likelihood of adverse effects that may result from exposure to specified health hazards or from the absence of beneficial influences. (Last, Dictionary of Epidemiology, 1988)Popliteal Artery: The continuation of the femoral artery coursing through the popliteal fossa; it divides into the anterior and posterior tibial arteries.Vascular Fistula: An abnormal passage between two or more BLOOD VESSELS, between ARTERIES; VEINS; or between an artery and a vein.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.Models, Cardiovascular: Theoretical representations that simulate the behavior or activity of the cardiovascular system, processes, or phenomena; includes the use of mathematical equations, computers and other electronic equipment.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.Carotid Artery, Internal, Dissection: The splitting of the vessel wall in one or both (left and right) internal carotid arteries (CAROTID ARTERY, INTERNAL). Interstitial hemorrhage into the media of the vessel wall can lead to occlusion of the internal carotid artery and aneurysm formation.Mechanical Thrombolysis: Procedures to cause the disintegration of THROMBI by physical interventions.Recurrence: The return of a sign, symptom, or disease after a remission.Incidental Findings: Unanticipated information discovered in the course of testing or medical care. Used in discussions of information that may have social or psychological consequences, such as when it is learned that a child's biological father is someone other than the putative father, or that a person tested for one disease or disorder has, or is at risk for, something else.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.Mesenteric Artery, Inferior: The artery supplying nearly all the left half of the transverse colon, the whole of the descending colon, the sigmoid colon, and the greater part of the rectum. It is smaller than the superior mesenteric artery (MESENTERIC ARTERY, SUPERIOR) and arises from the aorta above its bifurcation into the common iliac arteries.Thrombosis: Formation and development of a thrombus or blood clot in the blood vessel.Aortic Diseases: Pathological processes involving any part of the AORTA.Femoral Artery: The main artery of the thigh, a continuation of the external iliac artery.Glasgow Outcome Scale: A scale that assesses the outcome of serious craniocerebral injuries, based on the level of regained social functioning.Fatal Outcome: Death resulting from the presence of a disease in an individual, as shown by a single case report or a limited number of patients. This should be differentiated from DEATH, the physiological cessation of life and from MORTALITY, an epidemiological or statistical concept.Coated Materials, Biocompatible: Biocompatible materials usually used in dental and bone implants that enhance biologic fixation, thereby increasing the bond strength between the coated material and bone, and minimize possible biological effects that may result from the implant itself.Polytetrafluoroethylene: Homopolymer of tetrafluoroethylene. Nonflammable, tough, inert plastic tubing or sheeting; used to line vessels, insulate, protect or lubricate apparatus; also as filter, coating for surgical implants or as prosthetic material. Synonyms: Fluoroflex; Fluoroplast; Ftoroplast; Halon; Polyfene; PTFE; Tetron.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.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.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.Vascular Patency: The degree to which BLOOD VESSELS are not blocked or obstructed.Ligation: Application of a ligature to tie a vessel or strangulate a part.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.ElastinCerebral 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.Equipment Failure Analysis: The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.Feasibility Studies: Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.Patient Selection: Criteria and standards used for the determination of the appropriateness of the inclusion of patients with specific conditions in proposed treatment plans and the criteria used for the inclusion of subjects in various clinical trials and other research protocols.Intraoperative Complications: Complications that affect patients during surgery. They may or may not be associated with the disease for which the surgery is done, or within the same surgical procedure.Paraplegia: Severe or complete loss of motor function in the lower extremities and lower portions of the trunk. This condition is most often associated with SPINAL CORD DISEASES, although BRAIN DISEASES; PERIPHERAL NERVOUS SYSTEM DISEASES; NEUROMUSCULAR DISEASES; and MUSCULAR DISEASES may also cause bilateral leg weakness.Buttocks: Either of two fleshy protuberances at the lower posterior section of the trunk or HIP in humans and primate on which a person or animal sits, consisting of gluteal MUSCLES and fat.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.Carotid Artery, Common: The two principal arteries supplying the structures of the head and neck. They ascend in the neck, one on each side, and at the level of the upper border of the thyroid cartilage, each divides into two branches, the external (CAROTID ARTERY, EXTERNAL) and internal (CAROTID ARTERY, INTERNAL) carotid arteries.Loeys-Dietz Syndrome: An autosomal dominant aneurysm with multisystem abnormalities caused by increased TGF-BETA signaling due to mutations in type I or II of TGF-BETA RECEPTOR. Additional craniofacial features include CLEFT PALATE; CRANIOSYNOSTOSIS; HYPERTELORISM; or bifid uvula. Phenotypes closely resemble MARFAN SYNDROME; Marfanoid craniosynostosis syndrome (Shprintzen-Goldberg syndrome); and EHLERS-DANLOS SYNDROME.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.Spinal Cord Ischemia: Reduced blood flow to the spinal cord which is supplied by the anterior spinal artery and the paired posterior spinal arteries. This condition may be associated with ARTERIOSCLEROSIS, trauma, emboli, diseases of the aorta, and other disorders. Prolonged ischemia may lead to INFARCTION of spinal cord tissue.Aorta: The main trunk of the systemic arteries.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.Vascular Grafting: Surgical insertion of BLOOD VESSEL PROSTHESES, or transplanted BLOOD VESSELS, or other biological material to repair injured or diseased blood vessels.Viscera: Any of the large interior organs in any one of the three great cavities of the body, especially in the abdomen.Ophthalmic Artery: Artery originating from the internal carotid artery and distributing to the eye, orbit and adjacent facial structures.Behcet Syndrome: Rare chronic inflammatory disease involving the small blood vessels. It is of unknown etiology and characterized by mucocutaneous ulceration in the mouth and genital region and uveitis with hypopyon. The neuro-ocular form may cause blindness and death. SYNOVITIS; THROMBOPHLEBITIS; gastrointestinal ulcerations; RETINAL VASCULITIS; and OPTIC ATROPHY may occur as well.Elastic Tissue: Connective tissue comprised chiefly of elastic fibers. Elastic fibers have two components: ELASTIN and MICROFIBRILS.Brachiocephalic Trunk: The first and largest artery branching from the aortic arch. It distributes blood to the right side of the head and neck and to the right arm.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.Esophageal Fistula: Abnormal passage communicating with the ESOPHAGUS. The most common type is TRACHEOESOPHAGEAL FISTULA between the esophagus and the TRACHEA.Survival Rate: The proportion of survivors in a group, e.g., of patients, studied and followed over a period, or the proportion of persons in a specified group alive at the beginning of a time interval who survive to the end of the interval. It is often studied using life table methods.Cranial Nerve Diseases: Disorders of one or more of the twelve cranial nerves. With the exception of the optic and olfactory nerves, this includes disorders of the brain stem nuclei from which the cranial nerves originate or terminate.Prostheses and Implants: Artificial substitutes for body parts, and materials inserted into tissue for functional, cosmetic, or therapeutic purposes. Prostheses can be functional, as in the case of artificial arms and legs, or cosmetic, as in the case of an artificial eye. Implants, all surgically inserted or grafted into the body, tend to be used therapeutically. IMPLANTS, EXPERIMENTAL is available for those used experimentally.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.Axillary Artery: The continuation of the subclavian artery; it distributes over the upper limb, axilla, chest and shoulder.Oculomotor Nerve Diseases: Diseases of the oculomotor nerve or nucleus that result in weakness or paralysis of the superior rectus, inferior rectus, medial rectus, inferior oblique, or levator palpebrae muscles, or impaired parasympathetic innervation to the pupil. With a complete oculomotor palsy, the eyelid will be paralyzed, the eye will be in an abducted and inferior position, and the pupil will be markedly dilated. Commonly associated conditions include neoplasms, CRANIOCEREBRAL TRAUMA, ischemia (especially in association with DIABETES MELLITUS), and aneurysmal compression. (From Adams et al., Principles of Neurology, 6th ed, p270)Suture Techniques: Techniques for securing together the edges of a wound, with loops of thread or similar materials (SUTURES).Fistula: Abnormal communication most commonly seen between two internal organs, or between an internal organ and the surface of the body.Hematoma: A collection of blood outside the BLOOD VESSELS. Hematoma can be localized in an organ, space, or tissue.Aortic Coarctation: A birth defect characterized by the narrowing of the AORTA that can be of varying degree and at any point from the transverse arch to the iliac bifurcation. Aortic coarctation causes arterial HYPERTENSION before the point of narrowing and arterial HYPOTENSION beyond the narrowed portion.Matrix Metalloproteinase 9: An endopeptidase that is structurally similar to MATRIX METALLOPROTEINASE 2. It degrades GELATIN types I and V; COLLAGEN TYPE IV; and COLLAGEN TYPE V.Hospital Mortality: A vital statistic measuring or recording the rate of death from any cause in hospitalized populations.Transducers, Pressure: Transducers that are activated by pressure changes, e.g., blood pressure.Arteries: The vessels carrying blood away from the heart.Length of Stay: The period of confinement of a patient to a hospital or other health facility.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.Replantation: Restoration of an organ or other structure to its original site.Hepatic Artery: A branch of the celiac artery that distributes to the stomach, pancreas, duodenum, liver, gallbladder, and greater omentum.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.Equipment Safety: Freedom of equipment from actual or potential hazards.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.Temporal Arteries: Arteries arising from the external carotid or the maxillary artery and distributing to the temporal region.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).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.Disease Progression: The worsening of a disease over time. This concept is most often used for chronic and incurable diseases where the stage of the disease is an important determinant of therapy and prognosis.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)Constriction: The act of constricting.Echocardiography, Transesophageal: Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.Saphenous Vein: The vein which drains the foot and leg.Radiographic Image Interpretation, Computer-Assisted: Computer systems or networks designed to provide radiographic interpretive information.Surgical Procedures, Minimally Invasive: Procedures that avoid use of open, invasive surgery in favor of closed or local surgery. These generally involve use of laparoscopic devices and remote-control manipulation of instruments with indirect observation of the surgical field through an endoscope or similar device.Enbucrilate: A tissue adhesive that is applied as a monomer to moist tissue and polymerizes to form a bond. It is slowly biodegradable and used in all kinds of surgery, including dental.Models, Anatomic: Three-dimensional representation to show anatomic structures. Models may be used in place of intact animals or organisms for teaching, practice, and study.Arteritis: INFLAMMATION of any ARTERIES.Intestinal Fistula: An abnormal anatomical passage between the INTESTINE, and another segment of the intestine or other organs. External intestinal fistula is connected to the SKIN (enterocutaneous fistula). Internal intestinal fistula can be connected to a number of organs, such as STOMACH (gastrocolic fistula), the BILIARY TRACT (cholecystoduodenal fistula), or the URINARY BLADDER of the URINARY TRACT (colovesical fistula). Risk factors include inflammatory processes, cancer, radiation treatment, and surgical misadventures (MEDICAL ERRORS).Cyanoacrylates: A group of compounds having the general formula CH2=C(CN)-COOR; it polymerizes on contact with moisture; used as tissue adhesive; higher homologs have hemostatic and antibacterial properties.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.Matrix Metalloproteinase 2: A secreted endopeptidase homologous with INTERSTITIAL COLLAGENASE, but which possesses an additional fibronectin-like domain.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.Ischemia: A hypoperfusion of the BLOOD through an organ or tissue caused by a PATHOLOGIC CONSTRICTION or obstruction of its BLOOD VESSELS, or an absence of BLOOD CIRCULATION.Chi-Square Distribution: A distribution in which a variable is distributed like the sum of the squares of any given independent random variable, each of which has a normal distribution with mean of zero and variance of one. The chi-square test is a statistical test based on comparison of a test statistic to a chi-square distribution. The oldest of these tests are used to detect whether two or more population distributions differ from one another.Cerebrovascular Circulation: The circulation of blood through the BLOOD VESSELS of the BRAIN.Neurologic Examination: Assessment of sensory and motor responses and reflexes that is used to determine impairment of the nervous system.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)Pulsatile Flow: Rhythmic, intermittent propagation of a fluid through a BLOOD VESSEL or piping system, in contrast to constant, smooth propagation, which produces laminar flow.Databases as Topic: Organized collections of computer records, standardized in format and content, that are stored in any of a variety of computer-readable modes. They are the basic sets of data from which computer-readable files are created. (from ALA Glossary of Library and Information Science, 1983)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.Tissue Adhesives: Substances used to cause adherence of tissue to tissue or tissue to non-tissue surfaces, as for prostheses.Paraparesis: Mild to moderate loss of bilateral lower extremity motor function, which may be a manifestation of SPINAL CORD DISEASES; PERIPHERAL NERVOUS SYSTEM DISEASES; MUSCULAR DISEASES; INTRACRANIAL HYPERTENSION; parasagittal brain lesions; and other conditions.Emergencies: Situations or conditions requiring immediate intervention to avoid serious adverse results.Stress, Mechanical: A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area.Kaplan-Meier Estimate: A nonparametric method of compiling LIFE TABLES or survival tables. It combines calculated probabilities of survival and estimates to allow for observations occurring beyond a measurement threshold, which are assumed to occur randomly. Time intervals are defined as ending each time an event occurs and are therefore unequal. (From Last, A Dictionary of Epidemiology, 1995)Cardiovascular Surgical Procedures: Surgery performed on the heart or blood vessels.Alloys: A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.Arterio-Arterial Fistula: Abnormal communication between two ARTERIES that may result from injury or occur as a congenital abnormality.Retroperitoneal Space: An area occupying the most posterior aspect of the ABDOMINAL CAVITY. It is bounded laterally by the borders of the quadratus lumborum muscles and extends from the DIAPHRAGM to the brim of the true PELVIS, where it continues as the pelvic extraperitoneal space.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.Laparotomy: Incision into the side of the abdomen between the ribs and pelvis.Takayasu Arteritis: A chronic inflammatory process that affects the AORTA and its primary branches, such as the brachiocephalic artery (BRACHIOCEPHALIC TRUNK) and CAROTID ARTERIES. It results in progressive arterial stenosis, occlusion, and aneurysm formation. The pulse in the arm is hard to detect. Patients with aortitis syndrome often exhibit retinopathy.Doxycycline: A synthetic tetracycline derivative with similar antimicrobial activity.Cerebellum: The part of brain that lies behind the BRAIN STEM in the posterior base of skull (CRANIAL FOSSA, POSTERIOR). It is also known as the "little brain" with convolutions similar to those of CEREBRAL CORTEX, inner white matter, and deep cerebellar nuclei. Its function is to coordinate voluntary movements, maintain balance, and learn motor skills.Tuberculosis, Cardiovascular: Pathological conditions of the CARDIOVASCULAR SYSTEM caused by infection of MYCOBACTERIUM TUBERCULOSIS. Tuberculosis involvement may include the HEART; the BLOOD VESSELS; or the PERICARDIUM.Thromboembolism: Obstruction of a blood vessel (embolism) by a blood clot (THROMBUS) in the blood stream.Graft Occlusion, Vascular: Obstruction of flow in biological or prosthetic vascular grafts.Hematoma, Subdural, Acute: Accumulation of blood in the SUBDURAL SPACE with acute onset of neurological symptoms. Symptoms may include loss of consciousness, severe HEADACHE, and deteriorating mental status.Hemoptysis: Expectoration or spitting of blood originating from any part of the RESPIRATORY TRACT, usually from hemorrhage in the lung parenchyma (PULMONARY ALVEOLI) and the BRONCHIAL ARTERIES.Survival Analysis: A class of statistical procedures for estimating the survival function (function of time, starting with a population 100% well at a given time and providing the percentage of the population still well at later times). The survival analysis is then used for making inferences about the effects of treatments, prognostic factors, exposures, and other covariates on the function.Popliteal Vein: The vein formed by the union of the anterior and posterior tibial veins; it courses through the popliteal space and becomes the femoral vein.Equipment and Supplies: Expendable and nonexpendable equipment, supplies, apparatus, and instruments that are used in diagnostic, surgical, therapeutic, scientific, and experimental procedures.Catheterization, Peripheral: Insertion of a catheter into a peripheral artery, vein, or airway for diagnostic or therapeutic purposes.Emergency Treatment: First aid or other immediate intervention for accidents or medical conditions requiring immediate care and treatment before definitive medical and surgical management can be procured.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.Retroperitoneal Fibrosis: A slowly progressive condition of unknown etiology, characterized by deposition of fibrous tissue in the retroperitoneal space compressing the ureters, great vessels, bile duct, and other structures. When associated with abdominal aortic aneurysm, it may be called chronic periaortitis or inflammatory perianeurysmal fibrosis.Coronary Angiography: Radiography of the vascular system of the heart muscle after injection of a contrast medium.Fibromuscular Dysplasia: An idiopathic, segmental, nonatheromatous disease of the musculature of arterial walls, leading to STENOSIS of small and medium-sized arteries. There is true proliferation of SMOOTH MUSCLE CELLS and fibrous tissue. Fibromuscular dysplasia lesions are smooth stenosis and occur most often in the renal and carotid arteries. They may also occur in other peripheral arteries of the extremity.Intraoperative Care: Patient care procedures performed during the operation that are ancillary to the actual surgery. It includes monitoring, fluid therapy, medication, transfusion, anesthesia, radiography, and laboratory tests.Shear Strength: The internal resistance of a material to moving some parts of it parallel to a fixed plane, in contrast to stretching (TENSILE STRENGTH) or compression (COMPRESSIVE STRENGTH). Ionic crystals are brittle because, when subjected to shear, ions of the same charge are brought next to each other, which causes repulsion.Cardiac Surgical Procedures: Surgery performed on the heart.Basal Ganglia Cerebrovascular Disease: A pathological condition caused by impaired blood flow in the basal regions of cerebral hemispheres (BASAL GANGLIA), such as INFARCTION; HEMORRHAGE; or ISCHEMIA in vessels of this brain region including the lateral lenticulostriate arteries. Primary clinical manifestations include involuntary movements (DYSKINESIAS) and muscle weakness (HEMIPARESIS).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).Rupture: Forcible or traumatic tear or break of an organ or other soft part of the body.Embolism: Blocking of a blood vessel by an embolus which can be a blood clot or other undissolved material in the blood stream.Neurosurgery: A surgical specialty concerned with the treatment of diseases and disorders of the brain, spinal cord, and peripheral and sympathetic nervous system.Logistic Models: Statistical models which describe the relationship between a qualitative dependent variable (that is, one which can take only certain discrete values, such as the presence or absence of a disease) and an independent variable. A common application is in epidemiology for estimating an individual's risk (probability of a disease) as a function of a given risk factor.

Prevalence of true vein graft aneurysms: implications for aneurysm pathogenesis. (1/984)

BACKGROUND: Circumstantial evidence suggests that arterial aneurysms have a different cause than atherosclerosis and may form part of a generalized dilating diathesis. The aim of this study was to compare the rates of spontaneous aneurysm formation in vein grafts performed either for popliteal aneurysms or for occlusive disease. The hypothesis was that if arterial aneurysms form a part of a systemic process, then the rates of vein graft aneurysms should be higher for patients with popliteal aneurysms than for patients with lower limb ischemia caused by atherosclerosis. METHODS: Infrainguinal vein grafting procedures performed from 1990 to 1995 were entered into a prospective audit and graft surveillance program. Aneurysmal change was defined as a focal increase in the graft diameter of 1.5 cm or greater, excluding false aneurysms and dilatations after graft angioplasty. RESULTS: During the study period, 221 grafting procedures were performed in 200 patients with occlusive disease and 24 grafting procedures were performed in 21 patients with popliteal aneurysms. Graft surveillance revealed spontaneous aneurysm formation in 10 of the 24 bypass grafts (42%) for popliteal aneurysms but in only 4 of the 221 grafting procedures (2%) that were performed for chronic lower limb ischemia. CONCLUSION: This study provides further evidence that aneurysmal disease is a systemic process, and this finding has clinical implications for the treatment of popliteal aneurysms.  (+info)

The diameter of the common femoral artery in healthy human: influence of sex, age, and body size. (2/984)

PURPOSE: To determine the relevance of dilatations of the common femoral artery (CFA), knowledge of the normal CFA diameter is essential. The diameter of the CFA in healthy male and female subjects of different ages was investigated. METHODS: The diameter of the CFA was measured in 122 healthy volunteers (59 male, 63 female; 8 to 81 years of age) with echo-tracking B-mode ultrasound scan. The influence of age, sex, height, weight, body surface area (BSA), and systolic blood pressure was analyzed by means of a multiple regression model. RESULTS: The CFA increased steadily in diameter throughout life. From 25 years onwards, the diameter was larger in men than in women. Significant correlations were found between the CFA diameter and weight (r = 0.58 and r = 0.57 in male and female subjects, respectively; P <.0001), height (r = 0.49 and r = 0.54 in male and female subjects, respectively; P <.0001), and BSA (r = 0.60 and r = 0.62 in male and female subjects, respectively; P <.0001). Age and BSA were used to create a model for prediction of the CFA diameter (r = 0.71 and r = 0.77 in male and female subjects, respectively; P <.0001). CONCLUSION: The diameter of the CFA increases with age, initially during growth but also in adults. This is related to age, body size, and sex male subjects have larger arteries than female subjects. It is now possible to predict the normal CFA diameter, and nomograms that may be used in the study of aneurysmal disease are presented.  (+info)

Focal aneurysmal dilatation of subchorionic vessels simulating chorioangioma. (3/984)

Subchorionic vascular aneurysms of the placenta are rare lesions and may present confusion with chorioangioma or focal mesenchymal dysplasia on sonography. To our knowledge, the findings of placental aneurysms have not been reported in the ultrasound literature. We present a case with detailed sonographic evaluation, including spectral and color Doppler and pathological analysis, that was mistaken for chorioangioma prenatally. Knowledge of this benign entity may allow the sonologist to recommend conservative management in similar cases.  (+info)

Vasa vasorum: another cause of the carotid string sign. (4/984)

BACKGROUND AND PURPOSE: Our purpose was to describe a variant of the carotid string sign that may be associated with a completely occluded vessel and to consider possible pathophysiological mechanisms for this observation. METHODS: Carotid angiography was performed in three patients with suspected carotid stenosis and in a fourth with carotid dissection. Surgery was performed in one of the patients with carotid stenosis. RESULTS: On all angiograms, instead of a single linear or curvilinear contrast "string," either single or multiple serpiginous channels were seen. In one case, such a channel was seen emanating from below the origin of an occluded internal carotid stump, reconstituting the distal portion of the vessel. Surgery revealed a completely occluded lumen with a small intramural vessel bypassing the obstruction. CONCLUSION: We propose that these channels are either atherosclerotically induced neovessels connecting bridging vasa vasorum or recanalized luminal thrombus. We review the literature associated with this subject.  (+info)

Mortality league tables: do they inform or mislead? (5/984)

OBJECTIVE: To examine certain methodological issues related to the publication of mortality league tables, with particular reference to severity adjustment and sample size. DESIGN: Retrospective analysis of inpatient hospital records. SETTING: 22 hospitals in North West Thames health region for the fiscal year 1992-3. SUBJECTS: All admissions with a principal diagnosis of aortic aneurysm, carcinoma of the colon, cervical cancer, cholecystectomy, fractured neck of femur, head injury, ischaemic heart disease, and peptic ulcer. MAIN MEASURES: In hospital mortality rates adjusted by disease severity and calculated on the basis of both admissions and episodes. RESULTS: The numbers of deaths from specific conditions were often small and the corresponding confidence intervals wide. Rankings of hospitals by death rate are sensitive to adjustment for severity of disease. There are some differences that cannot be explained using routine data. CONCLUSIONS: Comparison of crude death rates may be misleading. Some adjustment for differences in severity is possible, but current systems are unsatisfactory. Differences in death rates should be studied, but because of the scope for manipulating data, this should be undertaken in a collaborative rather than a confrontational way. Any decision to publish league tables of death rates will be on political rather than scientific grounds.  (+info)

Arterial aneurysms in patients infected with human immunodeficiency virus: a distinct clinicopathology entity? (6/984)

Arterial aneurysms have only recently been associated with the human immunodeficiency virus (HIV). The clinical and pathological features of 10 HIV-positive patients with arterial aneurysms were retrospectively evaluated. These aneurysms were unusual in that they affected young black patients, occurred in atypical sites, and tended toward multiplicity. Surgery was performed in eight patients. Acute and chronic inflammatory changes were revealed by means of histologic examination of the aneurysm walls, with occlusion of the vasa vasora by inflammatory infiltrate or edema being a prominent feature. Culture of the aneurysm wall or thrombus yielded positive results in two patients. The association between HIV and aneurysms may be coincidental, caused by direct viral action or by bacterial infection resulting from immunosuppression. Implications for therapy are discussed, and the need for further study is highlighted.  (+info)

Celiomesenteric anomaly with concurrent aneurysm. (7/984)

We describe a rare case of a celiomesenteric anomaly with concurrent aneurysm. The patient, a 53-year-old man, had no abdominal pain or discomfort. The presence of a celiac artery aneurysm was suspected on the basis of the results of abdominal computerized tomographic scanning and echo ultrasound scanning performed because of proteinuria. Intra-arterial digital subtraction angiographic results showed the anomaly and aneurysm. Because of the risk of rupture of the aneurysm, the lesion was repaired surgically, with the placement of an interpositional prosthetic graft. We found no previous reports of celiomesenteric anomaly with concurrent aneurysm repaired with prosthetic graft.  (+info)

Left subclavian artery aneurysm: two cases of rare congenital etiology. (8/984)

Subclavian artery aneurysms are uncommon. The most common causes of these aneurysms are atherosclerosis and traumatic pseudoaneurysm. We report two cases of rare congenial left subclavian artery aneurysms. Diagnosis with aortography and treatment with resection with bypass grafting are the optimal approaches to avoid life-threatening and limb-threatening ischemia.  (+info)

Primary femoral aneurysms are uncommon and are frequently associated with other aneurysms, particularly those of the aorta and popliteal arteries. True isolated atherosclerotic aneurysm of the superficial femoral artery is a rare pathology [2].. Rigdon et al discussed 17 "arteriosclerotic" superficial femoral artery aneurysms in 14 patients, which revealed complication at presentation in 65% - rupture in 35%, thrombosis in 18%, and distal emboli in 12%. However, limb salvage was 94% and there were no perioperative deaths [3]. Males (75%) were more common than females, and the average age was 77 years (range 61 to 93) [3].. True femoral artery aneurysms are attributed to weakening of the arterial wall due to atherosclerosis. True femoral artery aneurysms are relatively rare and are found in elderly men who have strong smoking history. Aortic aneurysms are approximately 10 times more common. According to Levi et al distal embolization occurs in 0-26% of cases, acute thrombosis occurs in around 15% ...
True pulmonary artery aneurysms are rare. Deterling and Clagett reported only eight cases in a review of 109 571 necropsies.2 Aggressive surgical approaches have often been advocated based on previous reports of dissection or rupture. Pulmonary artery aneurysms, even when very large, in the presence of low pulmonary pressures and the absence of left to right congenital or acquired shunts, may not pose such a risk in sharp contrast with those with pulmonary hypertension or Eisenmengers syndrome.3,4 Patients in this series all had low pulmonary arterial pressures, no significant congenital or acquired left to right shunts, and giant pulmonary artery aneurysms involving the main or proximal branch pulmonary arteries. They survived to a median age of 52 years without evidence of intimal tear or medial dissection and presented because of right ventricular dysfunction secondary to pulmonary regurgitation.. True aneurysms involve all components of the vessel wall.5 There may be associated intrinsic ...
TY - JOUR. T1 - Surgical and medical management of extracranial carotid artery aneurysms. AU - Fankhauser, Grant T.. AU - Stone, William M.. AU - Fowl, Richard J.. AU - ODonnell, Mark E.. AU - Bower, Thomas C.. AU - Meyer, Fredric B.. AU - Money, Samuel R.. PY - 2015/2/1. Y1 - 2015/2/1. N2 - Objective Extracranial carotid artery aneurysms (ECCAs) are extremely rare with limited information about management options. Our purpose was to review our institutions experience with ECCAs during 15 years and to discuss the presentation and treatment of these aneurysms. Methods A retrospective review of patients diagnosed with ECCAs from 1998 to 2012 was performed. Symptoms, risk factors, etiology, diagnostic methods, treatments, and outcomes were reviewed. Results During the study period, 141 aneurysms were diagnosed in 132 patients (mean age, 61 years; 69 men). There were 116 (82%) pseudoaneurysms and 25 (18%) true aneurysms; 69 (49%) aneurysms were asymptomatic, whereas 72 (52%) had symptoms (28 ...
A 79-year-old man, with a background of peripheral vascular disease, presented to the emergency department with a sudden increase in the size of his swelling in the right thigh, indicating rupture of his right superficial femoral artery aneurysm. His past medical history included having had a left femoropopliteal bypass (1986), abdominal aortic aneurysm repair (1991), repair of false aneurysm on the right (1992) and repair of left common femoral artery aneurysm (1995). On surgical exploration, four contiguous aneurysms in the right superficial femoral artery were identified, which measured around 25 cm in total length. After achieving control of the aneurysm, it was noted that the popliteal artery was unsuitable for anastomosis. However, the leg was still adequately perfused via collaterals in spite of the ligation, so nothing further was done. The patient was put on a heparin infusion postoperation, and had an uneventful recovery with a viable limb on discharge. It is a useful reminder that ...
Abstract The rarity of saphenous vein graft aneurysms following coronary artery bypass graft surgery presents an interesting case, as seen in a 72 year-old gentleman who underwent his third bypass surgery for an aneurysmal graft. Information regarding the case was gathered using the Lehigh Valley Health Network medical databases. The 8 cm aneurysmal portion of the graft was resected successfully and replaced with a CryoVein. Following surgery the patient had relief of symptoms and recovered well. It was determined that the patient had two true aneurysms present, making surgery a necessity in this specific case. Introduction Saphenous vein graft (SVG) aneurysms following coronary artery bypass grafting (CABG) are rare but fatal complications that frequently require surgical repair.1 We address a rare surgical case regarding an individual requiring a third sternotomy involving two SVG aneurysms with thrombus, 22 years following CABG. Information was gathered retrospectively using the LVHN database. Case
TY - JOUR. T1 - Less invasive (common) femoral artery aneurysm repair using endografts and limited dissection. AU - Pecoraro, Felice. AU - Veith, Frank J.. AU - Lachat, null. AU - Rancic, null. AU - Pfammatter, null. AU - Mayer, null. PY - 2013. Y1 - 2013. N2 - Objective: We report our experience with the treatment of femoral artery aneurysms (FAAs) under localanaesthesia with limited dissection, using endografts to facilitate the proximal anastomosis and some distalanastomoses.Method: Between January 2006 and December 2010, six males, mean age 72 years (range, 65e80 years) withFAAs were treated at the University Hospital of Zurich. All operations were performed under local anaesthesiawith analgosedation, except for one performed under spinal anaesthesia. After limited dissection and puncture ofthe anterior wall of the FAA, a sheath and a self-expanding endograft were introduced over a guide wire and withfluoroscopy they were guided intraluminally into the proximal normal neck of the FAA and ...
... s are uncommon and occur in a broad range of patients due to many etiologies. True aneurysms involving all layers of the carotid arterial wall and false aneurysms both occur. Overall, extracranial carotid artery an
Pulmonary venous aneurysm is rare and its etiology is still debated. Some studies have shown that acquired aneurysms are caused by an increase in left atrial pressure and mitral regurgitation. However, few reports have provided direct evidence of this pathology. We present a case of pulmonary venous aneurysm diagnosed using a combination of echocardiography and contrast-enhanced computed tomography with strong evidence for an etiology of severe mitral valve regurgitation. A 24-year-old Chinese man was diagnosed with mitral valve perforation with severe mitral regurgitation caused by infectious endocarditis. A right inferior pulmonary venous aneurysm was diagnosed by contrast-enhanced computed tomography. Color Doppler echocardiography revealed a mitral regurgitation jet filling the giant aneurysm. Three-dimensional echocardiography provided a clear stereoscopic view of the aneurysm. These imaging modalities provided direct evidence for the etiology of the pulmonary venous aneurysm.
TY - JOUR. T1 - Case report and management approach in idiopathic pulmonary arteries aneurysm. AU - Haj-Yahia, Saleem. AU - Sbaih, Mohammad. AU - Bali, Khalil. AU - Darwazah, Ahmad. AU - Othman, Wafiq. AU - Zaghari, Mahmoud. AU - Angelini, Gianni. AU - Caputo, Massimo. AU - Barqawi, Abdel-Karim. PY - 2018/10/26. Y1 - 2018/10/26. N2 - BACKGROUND: Idiopathic pulmonary artery aneurysm is a rare anomaly with only a handful reports in the literature. It is often asymptomatic, while the first presentation could be severe hemoptysis or death. Surgical intervention needs to be planned carefully with a multidisciplinary team approach to secure optimal outcome. We hope to spread our experience with such cases and to encourage other surgeons worldwide to deal surgically with these cases when its indicated.CASE PRESENTATION: A 47 years old man presented to our institution after three episodes of hemoptysis, echo demonstrated good left ventricle (LV) systolic function, normal right ventricle (RV) size and ...
The limited number of patients with identified Hughes-Stovin syndrome has precluded the initiation of controlled studies of the management of patients with pulmonary arterial aneurysms [3]. Corticosteroids, alone or in combination with an immunosuppressant, are generally considered first-line therapy [4]. Surgical resection has been the traditional treatment of choice when the risk of lethal hemoptysis necessitates more definitive therapy. Total pneumonectomy or lobectomy has been performed with some successful results [5].. The high morbidity associated with surgery and the frequent bilaterality and multifocality of the pulmonary artery aneurysms make transcatheter embolization an attractive alternative to surgery in most cases. To our knowledge, few patients with Hughes-Stovin syndrome have been treated by performing embolization of a pulmonary arterial aneurysm with the use of several agents, including steel coils, Ethibloc, and isobutyl cyanoacrylate, an epoxy [4, 6, 7].. This is the first ...
Carotid artery aneurysm: Find the most comprehensive real-world symptom and treatment data on carotid artery aneurysm at PatientsLikeMe. 23 patients with carotid artery aneurysm experience fatigue, depressed mood, pain, anxious mood, and insomnia and use Amphetamine-Dextroamphetamine, Cyclobenzaprine, Handicap/Disability Parking Permit, Pregabalin, and Pyridostigmine to treat their carotid artery aneurysm and its symptoms.
This is a prospective, multi-center study of patients with intracranial or peripheral aneurysms who are treated by the PC 400 System. The primary objective is to gather post market data on the Penumbra Coil 400 (PC 400) System in the acute treatment of intracranial and peripheral aneurysms. Approximately 2,000 patients with intracranial or peripheral aneurysms treated by the PC 400 System at up to 100 centers will be enrolled. Data for each patient are collected up to discharge or 3 days post-procedure, whichever occurs sooner. Long term follow-up to one year will be conducted in accordance to the standard of care at each participating hospital ...
2018 The Authors Introduction: The case of an idiopathic thrombosed popliteal aneurysm is described in an otherwise healthy 6 year old child. This is the fourth reported case and the second youngest patient to present with an idiopathic isolated popliteal aneurysm. Report: A 6 year old boy presented with an acutely ischaemic right foot. Computed tomography angiography confirmed a thrombosed popliteal aneurysm. A femoropopliteal bypass was performed with reversed long saphenous vein and ligation of the aneurysm. Yearly follow up is ongoing with ultrasound surveillance; the childs growth and development is unaffected, and the graft is patent. There was a readmission over six years later with claudication on the right side. There was evidence of thrombus in the graft with associated distal embolisation, which was managed conservatively with anticoagulation. Discussion: Given the rarity of such presentations in the paediatric population, there is minimal good quality data to guide treatment. There ...
The shape of an aneurysm is described as being fusiform or saccular which helps to identify a true aneurysm. A true aneurysm involves all three layers of the arterial blood vessel wall. The more common fusiform-shaped aneurysm bulges or balloons out on all sides of the aorta. A saccular-shaped aneurysm bulges or balloons out only on one side.. The aorta is under constant pressure from blood being ejected from the heart. With each heartbeat, the walls of the aorta expand and spring back, exerting continual pressure or stress on the already weakened aneurysm wall. Therefore, there is a potential for rupture (bursting) or dissection (separation of the layers of the thoracic aortic wall), which may cause life-threatening hemorrhage (uncontrolled bleeding) and, potentially, death.. Once formed, an aneurysm will gradually increase in size and there will be a progressive weakening of the aneurysm wall. Treatment for a thoracic aneurysm may include surgical repair or removal of the aneurysm to prevent ...
Find the best popliteal aneurysm doctors in Kolkata. Get guidance from medical experts to select popliteal aneurysm specialist in Kolkata from trusted hospitals - credihealth.com
Behcet disease is a sort of systemic vasculitis characterized by oral and genital ulcers as well as uveitis of the eye. Thoracic manifestations of Behcet disease include multiple bilateral pulmonary artery aneurysms that are of fusiform or saccul...
Doctor answers on Symptoms, Diagnosis, Treatment, and More: Dr. Colantino on what does it mean to have a popliteal aneurysm rupture: An aneurysm is an dilitation of a blood vessel. This is the result of weakening in the wall of the artery. The weakened wall can rupture, and bleeding into the tissues around the knee occurs, causing tremendous pain and swelling. The blood outside the artery can then impinge on flow to the lower leg and foot, causing ischemia. In all, very bad, and one of the reasons to fix aneurysms electively. for topic: What Does It Mean To Have A Popliteal Aneurysm Rupture
Peripheral aneurysms are rarely reported in Africa (4). Reports from western countries indicate that they are rare, but considered important because their presence may point to the concurrent involvement of the abdominal aorta (1,2). In the present study for example, half of the cases of popliteal aneurysms presented with concurrent abdominal aortic aneurysms. The clinical features of pulsatile masses, painful swellings, pressure effects, bleeding and gangrene are consistent with literature reports (2,3,6). Similarly the diagnostic modalities of doppler ultrasound, angiography and CT are typical for reported series (7,8). Indeed the ultrasonography provides a non invasive and relatively inexpensive technique for accurate and prompt diagnosis of aneurysm (8). The result of site localization in this study is unique. The popliteal artery is the most common site of peripheral aneurysms in Caucasian populations, accounting for 70 - 85% of the total, followed by femoral artery (1,2,10-14). In the ...
WHAT THIS STUDY ADDS Previous comparisons between open and endovascular repair of popliteal aneurysms have focused on asymptomatic patients, and have short follow up. This study is strengthened by the fact that it is contemporary, population based, without any selection bias, reporting on all kinds of presentations, and has approximately 90% 1 year follow up data. It shows that endovascular repair has significantly inferior results compared with open repair, in particular in the group of patients who present with acute ischaemia. We believe these results will make many vascular surgeons think twice before they treat patients endovascularly in the future. Background: Popliteal aneurysm (PA) is traditionally treated by open repair (OR). Endovascular repair (ER) has become more common. The aim was to describe time trends and compare results (OR/ER). Methods: The Swedish vascular registry, Swedvasc, has a specific PA module. Data were collected (2008-2012) and supplemented with a specific protocol ...
Charcot-Bouchard aneurysms (also known as miliary aneurysms or microaneurysms) are aneurysms of the brain vasculature which occur in small blood vessels (less than 300 micrometre diameter). Charcot-Bouchard aneurysms are most often located in the lenticulostriate vessels of the basal ganglia and are associated with chronic hypertension. Charcot-Bouchard aneurysms are a common cause of cerebral hemorrhage. If a Charcot-Bouchard aneurysm ruptures, it will lead to an intracerebral hemorrhage, which can cause hemorrhagic stroke, typically experienced as a sudden focal paralysis or loss of sensation. Charcot-Bouchard aneurysms are aneurysms in the small penetrating blood vessels of the brain. They are associated with hypertension. The common artery involved is the lenticulostriate branch of the middle cerebral artery. Common locations of hypertensive hemorrhages include the putamen, caudate, thalamus, pons, and cerebellum.[citation needed] As with any aneurysm, once formed they have a tendency to ...
Anastomotic aneurysms occurs at various levels of arterial system. Determining their location and incidence rate required investigation of large patient clinical material. Material and methods. In the years 1989-2010 in local centre 230 anastomotic aneurysms were operated in 180 patients. Results. For 187 (81.3%) patients anastomotic aneurysms were localised in the groin, while for remaining 43 (18.7%) they occurred in other localisations. In aortic arch branch they occurred four times (1.7), in descending aorta - three times (1.3%), in abdominal aorta - 14 (6.1%) and in iliac arteries - 6 (2.6%). While for anastomosis with popliteal artery they were diagnosed in 16 (7%) patients. Own clinical material was compared with literature data. Conclusions. Anastomotic aneurysms in over 80% of cases occur in the groin, remaining percentage corresponds to other localisations ...
Arterial aneurism. Close-up of an aneurism in the superior mesenteric artery. An aneurysm occurs when an artery wall weakens and swells like a balloon. If it bursts, an aneurysm can cause severe internal haemorrhage. - Stock Image C023/5657
Venous aneurysms may be either congenital or acquired. Most acquired venous aneurysms develop secondary to a traumatic vascular injury.2-4 Traumatic injury to a particular venous segment may cause disruption and weakness in the vessel wall and gradually result in dilatation and aneurysm formation, either true or false. Peripheral venous aneurysms may be seen in both lower and upper extremities and most have little clinical significance.7 However, they may present with severe clinical pictures such as deep venous thrombosis and pulmonary embolism.8. DSA produced a false positive result in this case. The wrong preoperative diagnosis in this case may be a result of problems attributable to angiography. Like almost every other diagnostic modality, it has user and technique dependent aspects to it. An error in the chain of consecutive steps may have resulted in the misdiagnosis. The premature diagnosis based on colour Doppler ultrasound and early DSA images may have been altered by DSA examination at ...
Development of aspergilloma is common in cases with a fungus ball-like shadow in cavities due to old tuberculosis. Some reports have shown that blood clots tend to appear as a fungus ball-like shadow. A 71-year-old man with a history of pulmonary tuberculosis presented with a fungus ball-like shadow in an old cavity and hemoptysis. There was no evidence of aspergillus infection on various examinations. We confirmed a blood clot and aneurysm of an artery under direct vision by bronchoscopy. A lateral thoracic artery aneurysm was detected by angiography ...
Treatment of a renal artery aneurysm depends on factors such as the size and location of the aneurysm and whether or not symptoms are present. Certain types of small (less than two centimeters, or about three-quarters of an inch) aneurysms may not be treated, but may be observed for growth or development of other complications.. Larger aneurysms (greater than two centimeters, or three-quarters of an inch), dissecting aneurysms, aneurysms causing kidney ischemia (lack of blood flow to the kidney tissue) and hypertension, aneurysms that are growing larger, and aneurysms causing symptoms may be treated surgically.. Because of the increased risk for rupture (bursting), a renal artery aneurysm in a pregnant woman or a woman of childbearing age will generally be treated surgically.. ...
The objectives of this study were to investigate the consistency, patency, and natural history of a vein graft canine aneurysm model and to determine the effectiveness of various coil designs on inducing aneurysm thrombosis. Twenty-one sacculuslike aneurysms were created in mongrel dogs by anastomosing a vein pouch to the common carotid artery. The model produced wide-neck aneurysms with 100% patency. The canine vein graft aneurysm provided an excellent model for the evaluation of endovascular devices. Three types of specially designed platinum coils were placed in the aneurysms: those with simple curves, those with complex curves, and those with flower petal curves and silk fibers. These coils were placed by the endovascular route by means of microcatheters. Flower petal coils with silk fibers were effective in producing thrombosis of the aneurysms, suggesting that coils of the appropriate design may be useful in the endovascular treatment of aneurysms. The other coil designs evaluated, those ...
Inclusion Criteria (Surgical Patients): 1. Non-emergent surgical candidate (aneurysm has not ruptured) 2. Patients 21 years of age or older 3. Male or infertile Female 4. Aneurysm >/=4.5 cm in diameter, or 5. Aneurysm >/= twice the normal aortic diameter directly above the aneurysm, or 6. Aneurysm >/= 4.0 cm in diameter and rapidly growing (0.5 cm in 6 months), or 7. Saccular aneurysm > 3.0 cm Inclusion Criteria (Stent Graft Patients) 1. Patient meets all inclusion criteria for surgical candidate 2. Aneurysm starts >/= 10 mm below the most distal main renal artery and the diameter of aorta within that aortic neck segment is not variable 3. Diameter of aortic fixation zone (neck) >/= 22mm and /= 13 cm extending from most distal main renal artery ostium to the distal anchoring site within the common iliac artery (or external iliac artery if planned occlusion of internal iliac artery) 6. Aortic neck ...
Expertise, Disease and Conditions: Abdominal Aortic Aneurysm (AAA), Aneurysms, Angioplasty, Aortic Aneurysms, Aortic Stent-Grafts/Endografts, Aortic Surgery, Arterial Aneurysm, Arterial Occlusive Disease, Arterial Ultrasound, Arteriovenous Fistulas (AVF), Atherosclerosis, Atherosclerosis Imaging, Carotid Artery Disease, Carotid Artery Stenosis, Carotid Artery Stenting, Carotid Endarterectomy, Carotid Ultrasound, Cerebrovascular Diseases, Claudication, Deep Vein Thrombosis (DVT), Diabetic Foot Ulcers, Dialysis Access, Endovascular Interventions, Endovascular Stent Grafts, Endovascular Surgery, Endovascular Therapies, Extractional Atherectomy, Femoral Artery Aneurysms, General Vascular Surgery, Limb Salvage Revascularization, Limb Threatening Ischemia, Lower Extremity Angioplasty, Lower Extremity Revascularization, Lower Extremity Stenting, Mesenteric Arterial Insufficiency, Minimally Invasive Endovascular Aneurysm Repair, Minimally Invasive Interventions, Non-Invasive Flow Studies (NIFS), ...
Expertise, Disease and Conditions: Abdominal Aortic Aneurysm (AAA), Aneurysms, Angioplasty, Aortic Aneurysms, Aortic Stent-Grafts/Endografts, Aortic Surgery, Arterial Aneurysm, Arterial Occlusive Disease, Arterial Ultrasound, Arteriovenous Fistulas (AVF), Atherosclerosis, Atherosclerosis Imaging, Carotid Artery Disease, Carotid Artery Stenosis, Carotid Artery Stenting, Carotid Endarterectomy, Carotid Ultrasound, Cerebrovascular Diseases, Claudication, Deep Vein Thrombosis (DVT), Diabetic Foot Ulcers, Dialysis Access, Endovascular Interventions, Endovascular Stent Grafts, Endovascular Surgery, Endovascular Therapies, Extractional Atherectomy, Femoral Artery Aneurysms, General Vascular Surgery, Limb Salvage Revascularization, Limb Threatening Ischemia, Lower Extremity Angioplasty, Lower Extremity Revascularization, Lower Extremity Stenting, Mesenteric Arterial Insufficiency, Minimally Invasive Endovascular Aneurysm Repair, Minimally Invasive Interventions, Non-Invasive Flow Studies (NIFS), ...
... outside of the brain.. The most common location for an aneurysm to occur outside of the brain is in the main artery in the stomach-the abdominal aorta. Abdominal Aortic Aneurysms ("AAA") can be lethal if not recognized and treated.. The "normal size" (diameter) of the abdominal aorta is approximately one inch (2.5 cm.) Typically an artery is recognized to have an aneurysm when its diameter increases by 50%, which would be about 1.5" or approximately 4cm from side to side. Arteries behave much like water balloons-that is, the bigger they get, the thinner they get. The thinner they get, the more chance there is of the artery popping or rupturing. A ruptured abdominal aortic aneurysm (AAA) is often fatal as the ruptured artery leads to massive internal bleeding and usually immediate death from exsanguination.. Smaller aneurysms are less likely to rupture than larger ones. Typically, when an aneurysm reaches 5cm, consideration is given to repairing the artery to prevent rupture. The exact ...
TY - JOUR. T1 - Peripheral retinal microaneurysms in chronic leukemia. AU - Jampol, Lee M.. AU - Goldberg, Morton F.. AU - Busse, Bruce. PY - 1975/8. Y1 - 1975/8. N2 - Of 25 patients with chronic leukemia, there was clinical evidence of peripheral retinal microaneurysm formation in two of eight patients with chronic lymphocytic leukemia and six of 17 patients with chronic myelogenous leukemia. There was no proliferative retinopathy in any of the 25 patients. An elevated leukocyte count seemed necessary for microaneurysm formation in leukemia, although some patients with elevated counts had no microaneurysms. The prolonged leukocytosis of chronic leukemia can produce peripheral capillary dropout, vascular stagnation, microaneurysm formation, and, rarely, peripheral proliferative retinopathy similar to sickle cell disease.. AB - Of 25 patients with chronic leukemia, there was clinical evidence of peripheral retinal microaneurysm formation in two of eight patients with chronic lymphocytic leukemia ...
Circulatory Failure and Lactic Acidosis Associated with Giant Saphenous Vein Graft Aneurysm, Rick Mooi, Carsten Arnoldussen and Jos le Noble
Results: In our experience, there were 47 males and the mean age was 62 years (16-80). In patients with PAAs and VAAs, technical success with the MFM was 100%. At 30 days, there were no deaths. Initial MFM patency was 97.5% (39/40) with patency of the thrombosed MFM successfully restored. Longer-term follow-up (mean 16±8 months) demonstrated progressive thrombosis and shrinkage of the aneurysm sacs and all side-branches were patent. In patients with aortic aneurysms, technical success was 100%, with no complications and no deaths at 30 days. Longer-term follow-up (8±7 months) demonstrated aneurysm-related survival of 100%, all-cause survival of 83.3%, intervention-free survival of 100% and 100% patency of the side branches. The longest duration for aneurysm sac thrombosis was 18 months. A significant mean diameter reduction was observed at 6 months (17.3 mm for the transversal maximal diameter and 13.83 mm for the antero-posterior diameter) in the TAAA group. In the literature review, there ...
Diagnosis of carotid artery aneurysm (costs for program #275058) ✔ Klinik Im Park ✔ Department of Vascular Surgery ✔ BookingHealth.com
A case of a portal venous aneurysm found incidentally on the staging of high-grade prostate cancer. In this case, the patient was asymptomatic and has not experienced any complications.
I really could use some input on this one. POSTOPERATIVE DIAGNOSIS: 1. Dysplastic pulmonary valve with mass. 2. Coronary artery disease. 3. Large pulm
OBJECTIVES: Medical therapies have not proven to be effective in halting or reversing the progressive dilation of aneurysms. Further, no therapy exists for small aortic aneurysms due to the significant risks of surgical repair. Smooth muscle cells (SMCs) have the ability to produce extracellular matrix (ECM) that is destroyed in the vessel wall during aneurysm formation. We hypothesized that polymeric nanoparticles bearing ascorbic acid (AA) and retinoic acid (RA) will be effective in reducing inflammation and promoting SMC synthesis of the ECM proteins, collagen and elastin, thus inhibiting aneurysm formation in vivo.. METHODS and RESULTS: Block co-polymer nanoparticles made of polyethylene oxide (PEO) and poly(ϵ-caprolactone) (PCL) capable of bearing both hydrophilic (AA) and hydrophobic (RA) drugs were fabricated by the formation of an organic/aqueous bi-phase stable emulsion. The particles were analyzed to ensure proper spherical morphology, nano diameter, and entrapment of drug prior to in ...
Aortic Aneurysm An aneurysm is a bulge or ballooning in the wall of an artery. Arteries are blood vessels that carry oxygen-rich blood from the heart to other parts of the body. If an aneurysm grows large, it can burst and cause dangerous bleeding or even death. Most aneurysms are in the infrarenal aorta (aorta below the kidney). The aorta is the largest artery in the body
First symptom often acute ischemia. -Thrombosis, peripheral embolization cause acute ischemia. -Occlusion may occur from fragmentation of mural thrombus. -Thrombus may occlude lumen of aneurysm or embolize. -Can progress rapidly to gangrene. -Recurrent embolization presents with sudden ischemia of toe or foot with gradual resolution. -Popliteal aneurysms rarely cause symptoms from compression of vein or tibial nerve. -Palpation suggests diagnosis ...
Splanchnic Artery Aneurysms powerpoint presentation slides is available for free download uploaded in belonging ppt presentation Health & Wellness category, Download and Use!
Diabetes is a negative risk factor for aortic aneurysm, but the underlying explanation for this phenomenon is unknown. We have previously demonstrated that Cell Division Autoantigen 1 (CDA1), which enhances TGF-β signaling, is upregulated in diabetes. We hypothesized that CDA1 plays a key role in conferring the protective effect of diabetes against aortic aneurysms. Male wildtype, CDA1 knockout, Apolipoprotein E (ApoE) knockout and CDA1/ApoE double knockout (dKO) mice were rendered diabetic. Whereas aneurysms were not observed in diabetic ApoE knockout and wildtype mice, 40% of diabetic dKO mice developed aortic aneurysms. These aneurysms were associated with attenuated aortic TGF-β signaling, reduced expression of various collagens as well as increased aortic macrophage infiltration and matrix metalloproteinase12 expression. In the well characterized model of angiotensin II (AngII) induced aneurysm formation, concomitant diabetes reduced fatal aortic rupture and attenuated suprarenal aortic ...
Aortic aneurysms are inherently unpredictable. One can never be sure whether any given aneurysm may rupture or dissect. Clinically, the criteria for surgical intervention are based on size and growth rate, but it remains difficult to identify a high-risk aneurysm, which may require intervention before the cutoff criteria, versus an aneurysm than can be treated safely by more conservative measures. In this work, we created a computational microstructural model of a medial lamellar unit (MLU) incorporating (1) growth and remodeling laws applied directly to discrete, individual fibers, (2) separate but interacting fiber networks for collagen, elastin, and smooth muscle, (3) active and passive smooth-muscle cell mechanics, and (4) failure mechanics for all three fiber types. The MLU model was then used to study different pathologies and microstructural anomalies that may play a role in vascular growth and failure. Our model recapitulated many aspects of arterial remodeling under hypertension with no ...
Semantic Scholar extracted view of Atherosclerosis and aneurysm formation in a saphenous vein-graft. by Alberto G de la Rocha et al.
Amazon has announced Simple Workflow Service (SWF), a service for orchestrating distributed and fault-tolerant tasks that are part of a workflow implementing a business process. Are the recently announced DynamoDB and SWF pieces of a bigger puzzle suggesting Amazons entering into PaaS cloud computing?
Competing interests JPE and SKS have patents pending related to this technology. No other specific conflicts exists for this study for any of the other authors. ACJ, NF, MH, AB, and JLR have competing interests. SKSs disclosures are as follows: Bausch and Lomb (C, R); Bioptigen (P); Allergan (R); Zeiss (C). JPEs disclosures are as follows: Bioptigen (C, P), Thrombogenics (C, R), Genentech (C,R), Leica (C, P), Roche (C), Zeiss (C), Alcon (C,R), Novartis (C), Aerpio (C, R), Allergan (C), Allegra (C); Novartis (C, R), Regeneron (C, R). ...
OpenLogic is launching a platform-as-a-service offering that aims to give users the flexibility that many developers like about infrastructure-as-a-service...
Cloud-native computing takes advantage of many modern techniques, including PaaS, multicloud, microservices, agile methodology, containers, CI/CD, and devops
Subclavian artery aneurysms are relatively rare in comparison with other peripheral aneurysms. We report a 65-year-old woman with multiple atherosclerotic aneurysms of the subclavian artery, aortic arch saccular aneurysm and abdominal aortic aneurysm
Splenic artery aneurysm (SAA) is defined as an abnormal dilatation of the splenic artery more than 1 cm in diameter. It was first described on cadavers in 1770 by Beaussier [7]. It accounts for approximately 60 % of all visceral arterial aneurysms [2]. It is the third most common intra-abdominal aneurysm, following aortic and iliac artery aneurysms [3]. SAA is rarely seen with a prevalence of 1 % [1]. It is four times more common in females compared to males [8-10]. Risk factors correlating to the development of SAA include fibromuscular dysplasia, collagen vascular diseases, female gender, history of multiple pregnancies, and portal hypertension, although the pathogenesis is not fully understood [11].. Splenic artery pseudoaneurysms are less prevalent than true SAA. They differ from true SAA in that the dilatation occurs following the disruption of one or more layers of the vessel wall. Splenic artery accounts for the majority of splanchnic pseudoaneurysms. Unlike true SAA, they have a slight ...
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... with the most common locations of ruptured aneurysms marked ...
Brain trauma, aneurysms, arteriovenous malformations, brain tumors[1]. Risk factors. High blood pressure, amyloidosis, ... Acceleration-deceleration trauma,[9][10][11] rupture of an aneurysm or arteriovenous malformation (AVM), and bleeding within a ... Causes include brain trauma, aneurysms, arteriovenous malformations, and brain tumors.[1] The largest risk factors for ...
Aneurysm. *Cerebral aneurysm *Intracranial berry aneurysm. *Charcot-Bouchard aneurysm. Other/general. *Cerebral vasculitis ...
... aneurysm, vascular malformations, or tumors, particularly of the choroid plexus.[2] However 70% of IVH are secondary in nature ...
Aneurysm. *Cerebral aneurysm *Intracranial berry aneurysm. *Charcot-Bouchard aneurysm. Other/general. *Cerebral vasculitis ...
Bret P Nelson (2015-10-01). "Thoracic Aneurysm". Medscape. Retrieved 2017-04-16. Wolak, Arik; Gransar, Heidi; Thomson, Louise E ... whereas a diameter greater than 4.5 cm is generally considered to be a thoracic aortic aneurysm. Still, the average diameter in ...
It can also refer to the artery in which an aneurysm has occurred. "Parent artery". medilexicon. Retrieved 20 January 2017. " ...
Lindholt JS, Juul S, Fasting H, Henneberg EW (Apr 2005). "Screening for abdominal aortic aneurysms: single centre randomised ... Bret P Nelson (2015-10-01). "Thoracic Aneurysm". Medscape. Retrieved 2017-04-16. Wolak, Arik; Gransar, Heidi; Thomson, Louise E ... "Aortic Aneurysm Screening in a High-Risk Population: A Non-Contrast Computed Tomography Study in Korean Males with Hypertension ...
"Intracranial aneurysm. A nine-year study." Ohio State Medical Journal 1966 Nov;62(11):1168-71.. ... "Surgical risk as related to time of intervention in the repair of intracranial aneurysms." Journal of Neurosurgery 1968 Jan;28( ...
... submitral aneurysm; hypertrophic cardiomyopathy and the time course of "false positive stress ECGs" In the late 1950s Barlow ...
Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
... may be required to identify aneurysms of the brain blood vessels, the most common cause of SAH.[10] ... Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Other diseases caused by high blood pressure include ischemic heart disease, stroke, peripheral arterial disease, aneurysms and ... Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Aneurysm / dissection /. pseudoaneurysm. *torso: Aortic aneurysm *Abdominal aortic aneurysm. *Thoracic aortic aneurysm ...
Upper gastrointestinal bleed Pancreatic branches of splenic artery Salmassi, Sadegh (1983). "Pancreatica Magna Aneurysm". ...
In cooperation with the Brain Aneurysm Foundation and the Neurosurgical Atlas, he created the Brain Aneurysm app, a collection ... He is among the few surgeons in the world who has successfully performed such a high number of complex brain tumor and aneurysm ... The app also connects to the Brain Aneurysm Foundation patient forum so users can stay connected wherever they are. The tool is ... aneurysms and arteriovenous malformations. As of 2014, he is the Director of Neurosurgical Oncology/Brain Tumor Surgery at the ...
Large aortic aneurysms. Liver disease, HELLP syndrome, thrombotic thrombocytopenic purpura/Haemolytic uremic syndrome, and ...
Learn about aortic aneurysms, a balloon-like bulge in the aorta that can dissect or rupture. ... Other Types of Aneurysms Aneurysms can happen in other parts of your body. A ruptured aneurysm in the brain can cause a stroke ... Abdominal Aortic Aneurysms An abdominal aortic aneurysm happens below the chest. Abdominal aortic aneurysms happen more often ... Thoracic Aortic Aneurysms A thoracic aortic aneurysm happens in the chest. Men and women are equally likely to get thoracic ...
Learn about aortic aneurysms, a balloon-like bulge in the aorta that can dissect or rupture. ... Other Types of Aneurysms Aneurysms can happen in other parts of your body. A ruptured aneurysm in the brain can cause a stroke ... Abdominal Aortic Aneurysms An abdominal aortic aneurysm happens below the chest. Abdominal aortic aneurysms happen more often ... Aortic aneurysms were the cause of 9,928 deaths in 2017.1. *About 60% of deaths due to aortic aneurysm or aortic dissection ...
... Rebleeding *Of the 18,000 persons who survive the initial rupture of an aneurysm annually, 3,000 either ... Early treatment, with either surgical or endovascular methods, of the aneurysm is the most effective means of preventing ... Stay current with the Brain Aneurysm Foundation. Sign up to receive our newsletter! ... middle cerebral aneurysm location, and duration of coma after SAH. Seizures generally occur within 18 months (if they do occur ...
Click here to listen to a webinar on brain aneurysms and the recovery process in "The Care of Cerebral Aneurysms: What the ... Brain aneurysm survivors are a small population of people, but they are growing larger as medical technology continues to grow ... One of the most frequently asked questions by brain aneurysm survivors is "How long until I get better?" Unfortunately, there ... "Ive met many people through The Brain Aneurysm Foundation. Each one with their own unique story. Of survival, of appreciation ...
Saccular aneurysms[edit]. Saccular aneurysms, also known as berry aneurysms, appear as a round outpouching and are the most ... See also: Aneurysm § Pathophysiology. Aneurysm means an outpouching of a blood vessel wall that is filled with blood. Aneurysms ... Cerebral aneurysms are classified both by size and shape. Small aneurysms have a diameter of less than 15 mm. Larger aneurysms ... Basilar artery aneurysms represent only 3%-5% of all intracranial aneurysms but are the most common aneurysms in the posterior ...
An aneurysm is a bulge in the wall of an artery and can develop and grow for years without causing any symptoms. Learn about ... Aneurysms also can happen in arteries in the brain, heart and other parts of the body. If an aneurysm in the brain bursts, it ... Aneurysms can develop and become large before causing any symptoms. Often doctors can stop aneurysms from bursting if they find ... They use imaging tests to find aneurysms. Often aneurysms are found by chance during tests done for other reasons. Medicines ...
A brain aneurysm is a bulge or ballooning in a blood vessel in the brain. It is life-threatening it if bursts. Learn about the ... Brain Aneurysm: Dealing with Emotional Distress (Brain Aneurysm Foundation) * Brain Aneurysm: Recovery (Brain Aneurysm ... Brain Aneurysm: Treatment Options (Brain Aneurysm Foundation) * Embolization of Brain Aneurysms and Fistulas (American College ... Brain aneurysm repair (Medical Encyclopedia) Also in Spanish * Brain aneurysm repair - discharge (Medical Encyclopedia) Also in ...
... and vomiting are presented in a 43-year-old woman diagnosed with giant PICA aneurysm. What are its characteristic imaging ...
Read about abdominal aortic aneurysm (AAA), which is a bulge or swelling in the aorta (the main blood vessel running from the ... An abdominal aortic aneurysm (AAA) is a bulge or swelling in the aorta, the main blood vessel that runs from the heart down ... Whos at risk of an abdominal aortic aneurysm (AAA). An AAA can form if the sides of the aorta weaken and balloon outwards. ... Reducing your risk of an abdominal aortic aneurysm (AAA). There are several things you can do to reduce your chances of getting ...
An aneurysm is a ballooning of part of the aorta caused by hardening of the lining of this artery due to a build up of fatty ... Aortic aneurysm. An operation to remove the diseased part of the aorta and replace it with a graft is an effective, relatively ... When the aneurysm reaches a certain size it can interfere with the circulation to various organs of the body. ... My uncle had surgery a few days ago for an aortic aneurysm. ... What is a dissecting aortic aneurysm?. Why am I getting ...
An aneurysm is the bulging of artery or cardiac chamber walls. There may be no symptoms, but, if the walls rupture, it can be ... Peripheral aneurysms are less likely to rupture than aortic aneurysms.. Treatment. Not all cases of unruptured aneurysm need ... Peripheral aneurysm. An aneurysm can also occur in a peripheral artery. Types of peripheral aneurysm include:. *Popliteal ... Fast facts on aneurysms. *Aneurysms affect a variety of arteries. The most significant aneurysms affect the arteries supplying ...
Brain Aneurysm Posted by Peter Smith on 9 Aug 2014 at 8:22 pm I had an uncle who died of an aneurysm, I also had a bleed and ... Aneurysm Hereditary Posted by Angela B on 10 Jan 2014 at 2:06 pm I was diagnosed with a large 16mm x 8mm aneurysm on my basilar ... 12mm brain aneurysm 2003. Posted by Margaret Bunyan on 9 Nov 2010 at 4:56 am I had a brain aneurysm coiled in 2003 by a ... Aneurysm Posted by Anushika on 22 Dec 2013 at 2:04 pm Im writing to let you know of my personal experience with aneurysms. My ...
Nanorobot for Brain Aneurysm. The idea of nanorobots floating throughout our arteries to fight diseases and deliver drugs is ... Nanorobots used to detect brain aneurysm: (a) the nanorobots enter the vessel and flow with the bloodstream (b) the nanorobots ... So how does a nanorobot detect a cerebral aneurysm? First the research team, which includes the Center for Automation in ... the nanobiosensor is activated as the nanorobots move closer to the aneurysm, emitting RF signals sent to the cell phone (h) as ...
Answers.com® WikiAnswers® Categories Health Conditions and Diseases Aneurysm What is a pseudo aneurysm? ... What are aneurysms? "An aneurysm is a localized , blood-filled dilation of a blood vessel caused by disease or weakening of the ... How do you treat pseudo aneurysms? A pseudoaneurysm or a false aneurysm is a hematoma that forms outside the wall of an artery ... Where can you get an aneurysm? you can an aneurysm by a diseases ... What is a pseudo aneurysm? What is a pseudo aneurysm?. SAVE. ...
An aneurysm is an enlarged and weakened section of an artery. An aneurysm can be dangerous because as it increases in size, it ... The best method to repair each aneurysm depends upon several factors, including the location and shape of the aneurysm as well ... How is endovascular aneurysm repair performed?. Following is a general description of the procedure. Your vascular surgeon will ... Depending upon the type and location of the aneurysm, your surgeon may repair or replace your artery using tissues from your ...
... a large aneurysm or one that is pressing against certain nerves or tissues may cause symptoms even though the aneurysm has not ... A brain aneurysm seldom causes any noticeable symptoms until it ruptures. In some cases, however, ... A brain aneurysm seldom causes any noticeable symptoms until it ruptures. In some cases, however, a large aneurysm or one that ... Once a cerebral aneurysm has burst, the consequences can be severe and life threatening. A ruptured cerebral aneurysm is also ...
... Background. According to the World Health Organization (WHO), stroke (a disruption of blood ... The aneurysm then slowly shrinks, completely disappearing within a few months. The technology is a vast improvement over ... In Singapore, doctors see over 200 patients a year with ruptured or burst aneurysms, and in the United States alone nearly ... The first innovation in this line is the X*Calibur Aneurysm Occlusion Device (X*Calibur AOD), an innovative, minimally invasive ...
Find Carotid aneurysm information, treatments for Carotid aneurysm and Carotid aneurysm symptoms. ... MedHelps Carotid aneurysm Center for Information, Symptoms, Resources, Treatments and Tools for Carotid aneurysm. ... 1 year after dissecting carotid aneurysm- headaches/aneamia is it related? - Brain (Cerebral) Aneurysm Community ... They found a 4mm carotid aneurysm in my scan last week. I am to get a CT Angiogram Wed and ... ...
Read the answers to some frequently asked questions on abdominal aortic aneurysm (AAA) screening, including advice about ... This is because aneurysms develop very slowly and it takes a long time to properly assess the full benefits of the screening ... If youre screened and found to have an aneurysm, this information will need to be shared with a vascular unit so you can get ... the service is of good quality and achieving its main aim of preventing men dying from the complications of having an aneurysm ...
This annual swim is dedicated to brain aneurysm victims; the money ... The brain aneurysm swim was a great experience for me. My nana, Joan Imhof, created and organized the swim at Oyster Bay Cove ... This annual swim is dedicated to brain aneurysm victims; the money raised goes to help fund brain aneurysm research. ... The brain aneurysm swim was a great experience for me. My nana, Joan Imhof, created and organized the swim at Oyster Bay Cove ...
Case of Arteriovenous Aneurysm. Br Med J 1949; 1 doi: https://doi.org/10.1136/bmj.1.4616.1124 (Published 25 June 1949) Cite ...
An abdominal aortic aneurysm is when a weak area in the aorta swells up like a balloon. It can cause pain and discomfort if it ... Tags: abdominal aorta, abdominal aortic aneurysm, abdominal pain, Abdominal Pain - Short-term, adult, Aortic Aneurysm, Blood ... This is called an aneurysm. If an aneurysm forms in your abdominal aorta and grows too large, your aorta could tear or burst. ... If your aneurysm is small, it might not need to be treated. Your doctor may just monitor it using routine testing. If your ...
A retrospective review suggests it may also decrease the growth rate of brain aneurysms. ... aneurysm size and location in the brain, rupture status of designated primary aneurysms, angiographic features of the aneurysm ... "The major finding is that in this cohort of patients, who have multiple aneurysms, aspirin decreased the risk of aneurysm ... The remaining aneurysms were required to be ≤5 mm in size and to have been observed for growth, with ≥5 years of follow-up ...
Brain Aneurysm News and Research. RSS A brain/cerebral aneurysm (also known as an intracranial or intracerebral aneurysm) is a ... The bulging aneurysm can put pressure on a nerve or surrounding brain tissue. It may also leak or rupture, spilling blood into ... Cerebral aneurysms can occur anywhere in the brain, but most are located along a loop of arteries that run between the ... Cancer drug could be used to treat brain aneurysms, shows research An important class of drug used to treat cancer patients ...
I was just diagnosed with 2 aneurysms, the small one (2mm) is located in the right side of my brain, not sure of exact location ... Aneurysm... inoperable? JenVT Hi, I am a 33 year old female in good health, I was just diagnosed with 2 aneurysms, the small ... Told her also that my mother has had aneurysms ( which were clipped), and she just said I was too young to have aneurysms, ... It then looked at certain criteria such as patient age, aneurysm size, and aneurysm location. What the study showed was that in ...
  • (massgeneral.org)
  • Mayo Clinic doctors trained in brain conditions (neurologists) , brain surgery (neurosurgeons) , nonsurgical treatments (neurosurgeons and neuroradiologists), brain imaging (neuroradiologists) and other professionals research brain aneurysm development, diagnosis, monitoring, management and treatment. (mayoclinic.org)
  • This case highlights the need to consider ruptured coronary aneurysm as a differential diagnosis when cardiac tamponade is encountered during autopsy. (springer.com)
  • Quick diagnosis and treatment is important in the case of a ruptured aneurysm. (childrens.com)
  • If you don't have a repair surgery or procedure, you will have routine ultrasound tests to check the size of the aneurysm and see how fast it is growing. (cigna.com)
  • 2012 ). Based on the size of the aneurysm, it can be considered as a giant coronary aneurysm, if the diameter is more than 20 mm (Jha et al. (springer.com)
  • Other symptoms of a ruptured aneurysm include dizziness, weakness and loss of consciousness. (reference.com)
  • In previous work, we looked at the effect of aspirin on brain aneurysm, and other research supported our findings that aspirin decreased the risk of rupture," reported Hasan, whose group validated this finding in animal studies. (medscape.com)
  • As an aneurysm increases in size, the risk of rupture increases, leading to uncontrolled bleeding. (wikipedia.org)
  • As an aneurysm increases in size, the risk of rupture increases. (wikipedia.org)
  • Such aneurysms have a future risk of rupture and SAH that depends in part on their size and location. (uptodate.com)
  • In one embodiment, a neck bridge for bridging the neck of an aneurysm includes a junction region, a number of radially extending array elements attached to the junction region, and a cover attached to one or both of the junction region and an array element. (google.ca)
  • The array elements are configured to be positioned within the aneurysm after the neck bridge is deployed from a delivery device. (google.ca)
  • a cover attached to the junction region, an array element, or both, wherein the cover extends over the delivery shape of one of the array elements, wherein the neck bridge is configured for placement within or across the neck of the aneurysm. (google.ca)
  • In particular, the device include an upper member that sits against the dome of the aneurysm, a lower member that sits in the neck of the aneurysm, and a means of adjusting the overall dimensions of the device. (freepatentsonline.com)
  • It's placed on the 'neck' of the aneurysm or the area where it bubbles out from the artery. (uhn.ca)
  • When this happens, the person may suffer from severe headaches, blurred vision, changes in speech, and neck pain, depending on what areas of the brain are affected and how bad the aneurysm is. (rexhealth.com)
  • A ruptured aneurysm may present with sudden, severe headaches, blurred vision, seizures, a stiff neck, vomiting and feelings of nausea, light sensitivity and loss of consciousness. (livestrong.com)
  • In addition to being a cause of high blood pressure, the use of cigarettes may greatly increase the chances of a brain aneurysm rupturing. (rexhealth.com)
  • Actress Emilia Clarke has been hiding a secret health crisis after she was reportedly diagnosed with a brain aneurysm earlier this year (13). (hollywood.com)
  • Of patients with RAAs, 20% present with bilateral pathology, and 30% have multiple aneurysms. (medscape.com)
  • He may move blood flow away from the aneurysm. (drugs.com)
  • This diverts blood flow away from the aneurysm itself, ensuring it's no longer a danger to you. (hopkinsmedicine.org)
  • A very slow leak from a brain aneurysm may cause headaches or a large aneurysm may cause blurry vision, loss of vision , facial droop and possibly headaches . (medicinenet.com)
  • Codman Neuro has launched the CODMAN ENTERPRISE 2 Vascular Reconstruction Device, the latest generation of the company's self-expanding stent and delivery system used to treat wide-necked intracranial aneurysms and to help maintain the position of endovascular coils during and after the procedure. (news-medical.net)
  • At Emory is a national leader, specializing in the treatment of aneurysms using the GDC (Guglielmi Detachable) Coils. (emoryhealthcare.org)
  • In both cases, the aneurysm was successfully embolized using Guglielmi detachable coils. (tripdatabase.com)
  • Your healthcare provider may fill the aneurysm with coils or other devices. (drugs.com)
  • Coils, a special liquid, or balloons are used to fill the aneurysm and stop circulation, causing it to clot. (epnet.com)
  • This can lead to the formation of an aneurysm. (lhsc.on.ca)
  • The weakening of a vessel wall from damaged or diseased can lead to vessel dilatation and the formation of an aneurysm. (google.co.uk)