Vascular:  Related to blood vessels. Cerebrovascular disorders are those that affect the blood vessels in the brain. More about Cerebrovascular Surgery.
Vasodilatation:  An increase in the diameter of blood vessels.
Vasopressin:  A hormone secreted by the hypothalamus and stored in the posterior pituitary, which raises blood pressure and increases reabsorption of water by the kidneys.
Vasopressor:  An agent which constricts the arteries and raises blood pressure.
Vasospasm:  A state of spasm that tightens and narrows blood vessels around a brain aneurysm that are irritated by the blood from cerebral hemorrhage. The body's own attempt to prevent a second hemorrhage by restricting the flow of blood around the aneurysm.
Venous:  Related to veins.
Ventricle:  The cavities or chambers within the brain that contain the cerebrospinal fluid. There are two lateral ventricles and midline third and fourth ventricles.
Ventricular drainage:  Insertion of a small tube into the ventricles to drain cerebrospinal fluid, usually when pressure is increased.
Ventriculitis:  Inflammation and/or infection of the ventricles.
Ventriculo-atrial:  Describing a cerebrospinal fluid shunt from one of the ventricles in the brain to the right atrium of the heart.
Ventriculo-peritoneal:  Describing a cerebrospinal fluid shunt from one of the ventricles of the brain to the peritoneal cavity in the abdomen.
Ventriculogram:  An x-ray study of the ventricles.
Ventriculomegaly:  Enlarged cerebral ventricles. See also hydrocephalus.
Ventriculostomy:  An opening into the ventricles of the brain, such as by inserting a small, thin, hollow catheter.
Vermis:  The middle part of the cerebellum between the two hemispheres.
Vertebra:  Any of the 33 bones of the spinal column.
Vertebroplasty:  An image-guided procedure in which a special bone cement is injected into a fractured vertebra to stabilize the bone and relieve pain. Vertebroplasty is often used to treat spinal compression fractures.
Vertigo:  An abnormal sensation of rotation or movement of one's self or the environment.

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