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Definition

In mitral valve disease, the valve between the left heart chambers (left atrium and left ventricle) doesn't work properly.

Overview 

Types of mitral valve disease include:

  • Mitral valve stenosis: In this condition, the mitral valve opening is narrowed.
  • Mitral valve regurgitation:  In this condition, the flaps (leaflets) of the mitral valve weaken, causing blood to leak backward into the left atrium in the heart. If not treated, this can result in heart muscle damage. The most common cause of blood leakage is mitral valve prolapse, in which the leaflets bulge back into the left atrium as the heart contracts.‚Äč