MHC

Major histocompatability complex.

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mGy
Abbreviation for milligray.
MG (myasthenia gravis)
There is currently no cure for myasthenia gravis, but today at least 90 percent of patients with MG survive. A number of treatments are available that help, including steroids and other immunosuppressive medications and cholinergic medications.
mg
Abbreviation for milligram, a unit of measurement of mass in the metric system equal to a thousandth of a gram. A gram is equal to the mass of one milliliter, one thousandth of a liter, of water at 4 degrees C. MG (in capital letters) is the abbreviation for the disease myasthenia gravis.

Mitral valve
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 […]
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 […]