Defibrillator, automated external
Defibrillator, automated external: See: Automated external defibrillator.
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- Defibrillator, implantable cardiac
Defibrillator, implantable cardiac: A device that is designed to be put in the body to recognize certain types of abnormal heart rhythms (arrhythmias) and correct them by delivering precisely calibrated and timed electrical shocks to restore a normal heartbeat. Defibrillators continuously monitor the heart rhythm in order to detect overly rapid life-threatening arrhythmias, such as […]
- 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 history of genetics. The first successful instance of gene therapy in humans was […]
- Deficiency, alpha-1 antitrypsin
Deficiency, alpha-1 antitrypsin: An inherited disorder characterized by a lack of the alpha-1 antitrypsin protease inhibitor. Alpha-1 antitrypsin deficiency leads to damage of various organs, especially the lung and liver. Symptoms may become apparent at a very early age or anytime later, manifesting as shortness of breath due to emphysema or as liver symptoms such […]
- Deficiency, ankyrin
Deficiency, ankyrin: Known also as hereditary spherocytosis (HS), this is a genetic disorder of the red blood cell membrane clinically characterized by anemia, jaundice (yellowing) and splenomegaly (enlargement of the spleen), due to deficiency of ankyrin, a protein in the membrane of the red cell. In HS the red cells are smaller, rounder, and more […]
- Deficiency, calcium
Deficiency, calcium: A low blood level of calcium (hypocalcemia), which can make the nervous system highly irritable, causing spasms of the hands and feet (tetany), muscle cramps, abdominal cramps, overly active reflexes, and so on. Chronic calcium deficiency contributes to poor mineralization of bones, soft bones (osteomalacia) and osteoporosis, and, in children, rickets and impaired […]