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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «V»:

  1. Valgus Valgus
    Valgus: (valga, valgum) Angled outward, bent or twisted outward, as in cubitus valgus, coxa valga, hallux valgus, and genu valgum....
  2. Valine Valine
    Valine: An amino acid, one of the 20 building blocks of protein. A dietary essential amino acid, valine is required for optimal growth of children. It is one of the three branched-chain amino acids. Deficiency of the dehydrogenase enzyme for these branched-chain amino acids causes maple syrup urine ...
  3. Vallecula Vallecula
    Vallecula: An anatomic term for a crevice, furrow or depression. There are a variety of valleculae including one in the brain, another in the nail matrix, etc. However, used alone, the term "vallecula" usually applies to the epiglottic vallecula, a depression just behind the root of the tongue bet...
  4. Valley fever Valley fever
    Valley fever: A disease also called coccidioidomycosis (CM) due to a fungus called Coccidioides immitis. About 40% of people infected with this fungus develop symptoms. Most often they have an influenza-like illness with fever, cough, headaches, rash, and myalgias (muscle pains). Of those people wit...
  5. Valsalva Valsalva
    Valsalva: 1. The Valsalva maneuver in which a person tries to exhale forcibly with a closed glottis (windpipe) so that no air goes out through the mouth or nose. 2. The renowned Italian anatomist, pathologist, physician, and surgeon Antonio Maria Valsalva (1666-1723) who first described the maneuver...
  6. Valsalva maneuver Valsalva maneuver
    Valsalva maneuver: A maneuver in which a person tries to exhale forcibly with a closed glottis (the windpipe) so that no air exits through the mouth or nose as, for example, in strenuous coughing, straining during a bowel movement, or lifting a heavy weight. The Valsalva maneuver impedes the return ...
  7. Valsalva, Antonio Maria Valsalva, Antonio Maria
    Valsalva, Antonio Maria: Italian anatomist and pathologist, physician and surgeon (1666-1723), perhaps best known for the Valsalva maneuver. Valsalva described and depicted even the smallest muscles and nerves of the ear, subdividing the ear into its internal, middle, and external parts, and he show...
  8. Value, Daily Value, Daily
    Value, Daily: See Daily Value....
  9. Valve, aortic Valve, aortic
    Valve, aortic: One of the four valves in the heart, this valve is situated at exit of the left ventricle of the heart where the aorta (the largest of all arteries) begins. The aortic valve lets blood from the left ventricle be pumped up (ejected) into the aorta but prevents blood once it is in ...
  10. Valve, bicuspid Valve, bicuspid
    Valve, bicuspid: One of the four valves of the heart, this one is situated between the left atrium and the left ventricle. It permits blood to flow one way only, from the atrium into the ventricle. The valve is more commonly called the mitral valve because its two flaps (cusps) makes it look...
  11. Valve, mitral Valve, mitral
    Valve, mitral: One of the four valves of the heart, the mitral valve is situated between the left atrium and the left ventricle. It permits blood to flow one way: from the left atrium into the left ventricle. The mitral valve has two flaps (cusps) and so is called "mitral" because it looks like...
  12. Valve, pulmonary Valve, pulmonary
    Valve, pulmonary: One of the four valves in the heart, the pulmonary valve stands at the opening from the right ventricle in the pulmonary artery trunk. It lets blood head in the right direction (toward the lungs) and keeps it from sloshing back from the pulmonary artery into the heart. ...
  13. Valve, Spitz-Holter Valve, Spitz-Holter
    Valve, Spitz-Holter: See Spitz-Holter valve....
  14. Valve, tricuspid Valve, tricuspid
    Valve, tricuspid: One of the four heart valves, the tricuspid valve is the first one that blood encounters as it enters the heart. The tricuspid valve is situated between the right atrium and right ventricle and allows blood to flow only from the atrium into the ventricle. ...
  15. Valves, heart Valves, heart
    Valves, heart: There are four heart valves. All are one-way valves. Blood entering the heart first passes through the tricuspid valve and then the pulmonary valve. After returning from the lungs, the blood passes through the mitral (bicuspid) valve and exits via the aortic valve. ...