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Medical Dictionary Terms Beginning with V
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Vasomotor
Vasomotor: Relating to the nerves and muscles that cause the blood vessels to constrict or dilate.more detail info...
Vasomotor rhinitis
Vasomotor rhinitis: Inflammation of the nose (rhinitis) due to abnormal neuronal (nerve) control of the blood vessels in the nose. Vasomotor rhinitis is not allergic rhinitis.more detail info...
Vasopressin
Vasopressin: A relatively small (peptide) molecule that is released by the pituitary gland at the base of the brain after being made nearby (in the hypothalamus). Vasopressin has an antidiuretic action that prevents the production of dilute urinmore detail info...
Vasovagal attack
Vasovagal attack: A reflex of the involuntary nervous system called the vasovagal reaction that leads the heart to slow down (bradycardia) and, at the same time, it affects the nerves to the blood vessels in the legs permitting those vessels to dilate (wmore detail info...
Vasovagal reaction
Vasovagal reaction: A reflex of the involuntary nervous system called the vasovagal reaction. The vasovagal reaction leads the heart to slow down (bradycardia) and, at the same time, it effects the nerves to the blood vessels in the legs to permit thosemore detail info...
Vasovagal syncope
Vasovagal syncope: The temporary loss of consciousness in a particular kind of situation. (Syncope is temporary loss of consciousness or, in plain English, fainting). The situations that trigger this reaction are diverse and include having blood drawn, smore detail info...
VBAC
VBAC: Vaginal Birth After Cesarian section. Although the abbreviation VBAC does not appear in standard medical dictionaries, it is in active international use.more detail info...
Vector
Vector: In medicine, a vector is a carrier. The best way to understand a vector is to recall its origin as a word. Vector is the Latin word for a &bearer.& It is often an intermediary vehicle. For example, in malaria where the mosquito servesmore detail info...
VEG-F
VEG-F: Vascular endothelial growth factor.more detail info...
Vein
Vein: A blood vessel that carries blood low in oxygen content from the body to the heart. Because the venous blood is low in oxygen, it appears dark. Veins are part of the afferent wing of the circulatory system which returns blood to the heart.more detail info...
Vein, pulmonary
Vein, pulmonary: One of four vessels that carry aerated blood from the lungs to the right atrium of the heart. (The four are the right and left superior and inferior pulmonary veins). The pulmonary veins are the only veins that carry bright red oxygenamore detail info...
Velo-cardio-facial (VCF) syndrome
Velo-cardio-facial (VCF) syndrome: Also known as Shprintzen syndrome, this > is a congenital malformation (birth defect) syndrome with cleft palate, heart defect, abnormal face, and learning problems. The condition is therefore called the velo-cardimore detail info...
Velvet ant stings
Velvet ant stings: Common in most parts of the world including the Southern and Southwestern United States, velvet ants are not true ants but rather parasitic wasps. Their sting—like that of other wasps, fire ants, bees, yellow jackets, and hornetmore detail info...
Vena cava
Vena cava: The superior vena cava is the large vein which returns blood to the heart from the head, neck and both upper limbs. The inferior vena cava returns blood to the heart from the lower part of the body.more detail info...
Venereal
Venereal: Having to do with sexual contact. The word venereal comes from Venus, the Roman godess of love. A venereal disease (a morbus venereus) is contracted and transmitted by sexual contact.more detail info...
Venereal wart
Venereal wart: A wart that is confined primarily to the moist skin of the genitals. These warts are due to viruses belonging to the family of human papillomaviruses (HPVs) which are transmitted through sexual contact. The virus can also be transmmore detail info...
Venous aneurysm
Venous aneurysm: A local widening and bulging (an aneurysm) of a vein. As opposed to an arterial aneurysm or a cardiac aneurysm. An aneurysm is a localized widening (dilatation) of an artery, vein, or the heart. At the area of an aneurysm, theremore detail info...
Ventilator
Ventilator: A ventilator is a machine which mechanically assists patients in the exchange of oxygen and carbon dioxide (sometimes referred to as artificial respiration).more detail info...
Ventral
Ventral: The front or anterior side of a structure.more detail info...
Ventricles
Ventricles: Chambers of an organ. For example, the four connected cavities (hollow spaces) in the central brain or the four chambers of the heart.more detail info...