Incomplete closing of the [[Mitralklappe/en|mitral valve]]. Previously mostly due to [[Endokarditis/en|endocarditis]] after [[Infektion/en|infection]] with [[Streptokokken/en|streptococci]], today mitral valve stenosis occurs together with [[Kardiomyopathie/en|cardiomyopathy]] and [[coronary heart disease, coronary heart disease]].
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Incomplete closing of the [[Mitralklappe/en|mitral valve]]. Previously mostly due to [[Endokarditis/en|endocarditis]] after [[Infektion/en|infection]] with [[Streptokokken/en|streptococci]], today mitral valve stenosis occurs together with [[Kardiomyopathie/en|cardiomyopathy]] and [[Koronare Herzkrankheit/en|coronary heart disease]].