MSD Manual

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Understanding Stenosis and Regurgitation
CVS_stenosis_regurgitation_valves_a
Understanding Stenosis and Regurgitation

    The heart valves can malfunction either by leaking (causing regurgitation) or by not opening adequately and thus partially blocking the flow of blood through the valve (causing stenosis). Stenosis and regurgitation can affect any of the heart valves. These two disorders are shown below affecting the mitral valve.