Mitral stenosis

mitral stenosis

n. Abbr. MS

A narrowing of the mitral valve usually caused by rheumatic fever and resulting in an obstruction to the flow of blood from the left atrium to the left ventricle.

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Mitral stenosis

Narrowing or constricting of the mitral valve, which separates the left atrium from the left ventricle.

Mentioned in: Pulmonary Edema

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mitral stenosis Mitral valve obstruction Cardiology A sequela of rheumatic heart disease, primarily affecting ♀ and more common in developing nations Clinical Left-sided heart failure–DOE, orthopnea, paroxysmal nocturnal dyspnea; less commonly, hemoptysis, hoarseness, signs of right-sided heart failure; Sx may be triggered by A Fib, pregnancy or other stress–eg, RTI, endocarditis or other heart disease Examination Diastolic rumble after opening snap; S₁ is usually load, because the mitral valve remains open by a transient gradient until closed by the systolic force; pulmonary HTN is indicated by a loud P₂, right ventricular lift, ↑ neck veins, ascites, edema Workup Doppler echocardiography–↓ valve diameter, severity of stenosis Management Medical therapy in asymptomatic Pts–antibiotics for endocarditis; mild Sx–diuretics; with A Fib, digoxin, beta-blocker, or CCB; moderate Sx–balloon valvotomy if calcification not excessive, otherwise, valve repair or replacement. See Mitral valve.