Mitral prolapse
Drooping down or abnormal bulging of the mitral valve cusps during the contraction of the heart.
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- Mitral insufficiency
A malfunction of the mitral valve that permits the backflow of blood (regurgitation) from the left ventricle into the left atrium. Most mitral insufficiency is mild and requires no treatment. When severe, however, treatment with medications and sometimes surgery is necessary.
- Mitotic nondisjunction
The failure in mitosis for the two members of a chromosome pair to separate (to disjoin) normally so that both chromosomes go to one daughter cell while none go to the other daughter cell.
- MPO deficiency
Myeloperoxidase deficiency.
- MPS
Abbreviation for mucopolysaccharidosis.
- MRA
The magnetic resonance angiogram, or MRA, is a noninvasive test that has demonstrated usefulness in defining the anatomy of blood vessels of certain size in the head and neck. MRA serves as a complement to traditional MRI scanning in evaluation of the brain and neck. Conventional angiograms, whereby contrast material is injected through a catheter […]