Ejection fraction
Ejection fraction: The percentage of blood that is pumped out of a filled ventricle as a result of a heartbeat. The heart does not eject all the blood in the ventricle. Only about two-thirds of the blood is normally pumped out with each beat, and that fraction is referred to as the ejection fraction. The ejection fraction is an indicator of the heart’s health. If the heart is diseased from a heart attack or another heart condition, the ejection fraction may decrease.
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- ELA2
ELA2: The gene encoding the enzyme elastase 2 (neutrophilic elastase). Mutations in ELA2 cause cyclic neutropenia. See: Elastase 2.
- Elastase
Elastase: An enzyme that digests and degrades a number of proteins including elastin, an elastic substance in the lungs and some other organs that supports their structural framework. Elastase is specifically inhibited by alpha-1 antitrypsin. See also: Alpha-1 antitrypsin deficiency.
- Elastase 1
Elastase 1: Pancreatic elastase, a member of the pancreatic family of serine proteases. Although termed elastase, this powerful protease can hydrolyze numerous proteins, including elastin. The gene ELA1 that encodes elastase 1 is on chromosome 12q13.
- Elastase 2
Elastase 2: Neutrophil elastase, an enzyme in neutrophils that digests elastin. The gene ELA2 encoding elastase 2 is on chromosome 19p13,3. Mutations in ELA2 cause cyclic neutropenia, a blood disease in which there are regular cyclic fluctuations in the numbers of neutrophils and other blood cells. The cycles are classically 21 days but may range […]
- Elastic fiber
Elastic fiber: A slender fiber in connective tissue that is rich in the protein elastin and has an elastic quality.