A valve in the heart that is situated between the left atrium and the left ventricle. The mitral valve permits blood to flow from the left atrium into the left ventricle, but not in the reverse direction. The mitral valve has two flaps (cusps). It is so named because it looks like a bishop’s miter (headdress). Also known as bicuspid valve.
- Mitral valve prolapse
A common heart valve anomaly affecting 5’10 percent of people that involves prolapse (flopping backwards) of the mitral valve leaflets into the left atrium during contraction of the heart’s ventricles. This sometimes allows leakage of blood through the valve opening (mitral regurgitation). Most people with mitral valve prolapse have no symptoms, however, those who do […]
Pain due to ovulation that usually occurs at the midpoint between the menstrual periods. From the German mittel, meaning ‘middle,’ and schmerz, meaning ‘pain.’
- Mixed bipolar state
The occurrence of symptoms of mania and depression together. A person may feel sad and hopeless while at the same time feeling extremely energized. Also called dysphoric mania, mixed mania, or agitated depression.
- Mixed connective tissue disease
systemic lupus erythematosus, scleroderma, and polymyositis. Patients with mixed connective tissue disease typically have features of each of these three component diseases. They also typically have very high blood levels of antinuclear antibodies (ANAs) and antibodies to ribonucleoprotein (anti-RNP). The symptoms often eventually become dominated by features of one of the three component illnesses, most […]
- Mixed-lineage leukemia
A type of childhood leukemia in which a piece of chromosome 11 has been translocated (broken off and attached itself to another chromosome). Children with this type of leukemia have a particularly poor prognosis (outlook). The name comes from the fact that that the gene expression profiles in this disease differ from those seen in […]