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Drugs and diseases reference index

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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «D»:

  1. Deer mouse Deer mouse
    Deer mouse: A deceptively cute rodent capable of carrying the types of hantavirus that cause HPS (hantavirus pulmonary syndrome) in the US. The deer mouse has big eyes and big ears. Its head and body are normally about 2 to 3 inches long, and the tail adds another 2 to 3 inches in length. It occurs ...
  2. Deerfly fever Deerfly fever
    Deerfly fever: An infection in rabbits and other wild rodents caused by the bacterium Francisella tularensis that can be transmitted to humans by contact with infected animal tissues or ticks. Also called tularemia. The main mode of transmission to humans is tick bites in the summer and exposure t...
  3. Defecation syncope Defecation syncope
    Defecation syncope: The temporary loss of consciousness (syncope) upon defecating (having a bowel movement). Syncope is the temporary loss of consciousness or, in plain English, fainting. The situations that trigger this reaction are diverse and include having blood drawn, straining while urinating...
  4. Defect, atrial septal (ASD) Defect, atrial septal (ASD)
    Defect, atrial septal (ASD): A hole in the septum, the wall, between the atria, the upper chambers of the heart. Commonly called an ASD. ASDs are a major class of congenital cardiac malformation....
  5. Defect, enzyme Defect, enzyme
    Defect, enzyme: An abnormality in the protein (enzyme) important in catalyzing a normal biochemical reaction in the body. Disorders result from a deficiency (or functional abnormality) of an enzyme. Archibald Garrod in 1902 was the first to attribute a disease to an enzyme defect: an inborn error of...
  6. Defect, neural tube Defect, neural tube
    Defect, neural tube: A major birth defect caused by abnormal development of the neural tube, the structure present during embryonic life which gives rise to the central nervous system -- the brain and spinal cord. Neural tube defects (NTDs) are among the most common birth defects that cause infant m...
  7. Defect, ventricular septal (VSD) Defect, ventricular septal (VSD)
    Defect, ventricular septal (VSD): A hole in the septum (the wall) between the lower chambers of the heart (the ventricles). Ventricular Septal Defect is the most common type of heart malformation (congenital heart disease). At least 1 baby in every 500 is born with a VSD. A VSD lets blood from t...
  8. Defensin Defensin
    Defensin: A family of potent antibiotics made within the body by neutrophils (a type of white blood cell) and macrophages (cells that can engulf foreign particles). The defensins play important roles against invading microbes. They act against bacteria, fungi and viruses by binding to their membrane...
  9. Defensive medicine Defensive medicine
    Defensive medicine: Medical practices designed to avert the future possibility of malpractice suits. In defensive medicine, responses are undertaken primarily to avoid liability rather than to benefit the patient. Doctors may order tests, procedures, or visits, or avoid high-risk patients or pro...
  10. Defibrillation Defibrillation
    Defibrillation: The use of a carefully controlled electric shock, administered either through a device on the exterior of the chest wall or directly to the exposed heart muscle, to restart or normalize heart rhythms....
  11. Defibrillator Defibrillator
    Defibrillator: A device used to correct a dangerously abnormal heart rhythm, usually ventricular fibrillation, or to restart the heart by depolarizing its electrical conduction system and delivering brief measured electrical shocks to the chest wall or the heart muscle itself....
  12. Defibrillator storm Defibrillator storm
    Defibrillator storm: A condition that arises when a defibrillator implanted in the chest to right an arrhythmia (an abnormal heart rhythm) fires off frequently --sometimes several times a day or even more often -- each time with a jolt like a boxer's punch to the chest, because of far advanced heart...
  13. Defibrillator, automated external Defibrillator, automated external
    Defibrillator, automated external: See: Automated external defibrillator....
  14. Defibrillator, implantable cardiac Defibrillator, implantable cardiac
    Defibrillator, implantable cardiac: A device put within the body that is designed to recognize certain types of abnormal heart rhythms (arrhythmias) and correct them. Defibrillators continuously monitor the heart rhythm in order to detect rapid arrhythmias such as Ventricular tachycardia (rapid re...
  15. Deficiency, adenosine deaminase (ADA) Deficiency, adenosine deaminase (ADA)
    Deficiency, adenosine deaminase (ADA): A genetic (inherited) condition that results in a immune deficiency disorder called severe combined immunodeficiency disease. Adenosine deaminase is an enzyme that plays a key role in salvaging purine molecules. ADA deficiency is of special interest in the hi...