What is mitral regurgitation?
A person with mitral regurgitation has a leaky mitral valve. A normal mitral valve allows blood to flow from the left atrium, into the left ventricle. The mitral valve closes to prevent the backflow of blood from the left ventricle into the left atrium. Mitral regurgitation results when the mitral valve does not completely close, due to scarring, thickening, or malformation of the valve. Blood leaks from the left ventricle, into the left atrium. Common causes of mitral regurgitation include mitral valve prolapse and a heart attack. Severe mitral regurgitation can lead to congestive heart failure.

What are the symptoms of mitral regurgitation?
Symptoms of mitral regurgitation include fatigue, cough, faintness, and difficulty breathing that worsens with exertion and while lying flat. Additional symptoms of mitral regurgitation include palpitations, weight loss, leg swelling, and increased urination.

How does the doctor treat mitral regurgitation?
Treatment for mitral regurgitation may include heart valve surgery, medications, and antibiotics.