When divided by unified atomic mass units or daltons to form a pure numeric ratio, the atomic mass of an atom becomes a dimensionless value called the relative isotopic mass (see section below). Thus, the atomic mass of a carbon-12 atom is 12 u or 12 daltons (Da), but the relative isotopic mass of a carbon-12 atom is simply 12.
Most people who have mitral valve prolapse (MVP) donât need treatment because they donât have symptoms and complications. Even people who do have symptoms may not need treatment. The presence of symptoms doesnât always mean that the backflow of blood through the valve is significant. People who have MVP and troublesome mitral valve backflow may be treated with medicines, surgery, or both. The goals of treating MVP include:
mitral valve prolapse (MVP) a condition in which some portion of the mitral valve is pushed back into the left atrium during ventricular contraction.For reasons not fully understood (there is no evident disease process) there is redundant tissue on one or both leaflets of the valve.itral valve prolapse. n. Abbr. MVP. A condition in which there is excessive retrograde movement of the mitral valve into the left atrium during left ventricular systole, often allowing mitral regurgitation.