Mitral Valve Disease
نویسنده
چکیده
M itral valve leaflets consist of thin, pliable, fibrous material. The two leaflets—anterior and posterior—open by unfolding against the ventricular wall and close by apposition when the pressure in the left ventricle becomes greater than that in the left atrium. Mitral stenosis occurs when the mitral valve leaflets become stiffened, calcified, and unable to open completely during diastole. This process often involves the chordae tendineae in addition to the mitral valve leaflets. Mitral valve regurgitation occurs when the leaflets are unable to close completely in systole. In the United States, more than 20,000 patients annually require surgery for manifestations of mitral stenosis and mitral regurgitation, and thousands more require monitoring and treatment.
منابع مشابه
بررسی عوامل همراه در شیوع فیبریلاسیون دهلیزی و ترومبوآمبولی سیستمیک(سکته مغزی) در بیماران مبتلا به بیماری رماتیسمال دریچه‌ای قلب
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