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Mitral regurgitation, also known as mitral insufficiency or mitral incompetence, is the backward flow of blood from the left ventricle, through the mitral valve, and into the left atrium, when the left ventricle contracts, resulting in a systolic murmur radiating to the left armpit.
Mitral regurgitation: the backflow of blood from the left ventricle into the left atrium, owing to insufficiency of the mitral valve; it may be acute or chronic, and is usually due to mitral valve prolapse, rheumatic heart disease, or a complication of cardiac dilatation. See also Mitral regurgitation.
In abnormal conditions, blood may flow backward through the valve (mitral regurgitation) or the mitral valve may be narrowed (mitral stenosis). Rheumatic heart disease often affects the mitral valve; the valve may also prolapse with age and be affected by infective endocarditis. The mitral valve is named after the mitre of a bishop, which ...
Now even though we said that left-sided heart failure can cause mitral regurgitation, it also goes the other way, mitral regurgitation can be a cause of left-sided heart failure. With mitral regurgitation, every time the left ventricle contracts, some blood is inadvertently pumped out into the left atrium, which leads to increased preload as ...
Mitral valve prolapse is frequently associated with mild mitral regurgitation, [15] where blood aberrantly flows from the left ventricle into the left atrium during systole. In the United States, MVP is the most common cause of severe, non-ischemic mitral regurgitation. [4]
Regurgitation of blood through the mitral valve is possible, particularly if the infarction causes dysfunction of the papillary muscle. [72] Cardiogenic shock as a result of the heart being unable to adequately pump blood may develop, dependent on infarct size, and is most likely to occur within the days following an acute myocardial infarction ...
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