Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Mitral insufficiency
Medically reviewed by Min Clinic Staff | Updated: January 2026
Mitral insufficiency: A malfunction of the mitral valve that permits the backflow of blood (regurgitation) from the left ventricle into the left atrium. Most mitral insufficiency is mild and requires no treatment. When severe, however, treatment with medications and sometimes surgery is necessary.