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Drugs and diseases reference index

Drugs and diseases reference index
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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «V»:

  1. Varicella vaccination Varicella vaccination
    Varicella vaccination: See Chickenpox immunization....
  2. Varicocele Varicocele
    Varicocele: A common scrotal condition characterized by elongation and enlargement of the network of veins leaving the testis which join to form the testicular vein. (This venous network is called the pampiniform plexus.) A varicocele develops because of defective valves that normally let blood flow...
  3. Varicose vein Varicose vein
    Varicose vein: A dilated (widened) tortuous (twisting) vein, usually involving a superficial vein in the leg, often associated with incompetency of the valves in the vein. These visible and bulging veins are often associated with symptoms such as tired, heavy, or aching limbs. In severe cases, var...
  4. Varicose veins Varicose veins
    Varicose veins: See: Varicose vein....
  5. Varicosity Varicosity
    Varicosity: 1. An enlarged and tortuous vein, artery, or lymphatic vessel. 2. Specifically, a varicose vein....
  6. Variola Variola
    Variola: Smallpox, a highly contagious and frequently fatal viral disease characterized by a biphasic (double-humped) fever and a distinctive skin rash that (if the patient survived) left pock marks in its wake. The English physician Edward Jenner (1749-1823) exploited the fact that cowpox c...
  7. Variolation Variolation
    Variolation: The old practice of inoculating someone with the virus of smallpox to produce immunity to the disease. Lady Mary Wortley Montagu introduced this practice into England from Turkey in 1721. Unfortunately, the identification of a suitable strain of the virus was not an exact science and gr...
  8. Varix Varix
    Varix: An enlarged and convoluted vein, artery or lymphatic vessel. ...
  9. Varum Varum
    Varum: See: Varus....
  10. Varus Varus
    Varus: (vara, varum) Angled inward, bent or twisted inward, as in cubitus varus, hallux varus, talipes equinovarus, genu varum, and coxa vara....
  11. Vas deferens Vas deferens
    Vas deferens: The tube connecting the testes with the urethra. The vas deferens is a coiled duct that conveys sperm from the epididymis to the ejaculatory duct and the urethra....
  12. Vasa previa Vasa previa
    Vasa previa: A condition in which blood vessels within the placenta or the umbilical cord are trapped between the fetus and the opening to the birth canal, a situation that carries a high risk the fetus may die from hemorrhage due to a blood vessel tearing at the time the fetal membranes rupture or ...
  13. Vascular Vascular
    Vascular: Relating to the blood vessels of the body. The blood vessels of the body, as a group, are referred to as the vascular system. The blood vessels are composed of arteries, veins and capillaries -- arteries that pass oxygen-rich blood to the tissues of the body; veins which return oxyge...
  14. Vascular bed Vascular bed
    Vascular bed: The vascular system, or a part thereof: for example, the pulmonary vascular bed describes the blood vessels of the lungs....
  15. Vascular dementia Vascular dementia
    Vascular dementia: A common form of dementia in older persons that is due to cerebrovascular disease, usually with stepwise deterioration from a series of small strokes and a patchy distribution of neurologic deficits affecting some functions and not others. Risk factors include high blood pressure,...