Synonyms: mitral insufficiency, mitral incompetence
Mitral regurgitation (MR) occurs when the mitral valve does not close properly, causing the abnormal leaking of blood from the left ventricle through the mitral valve and back into the left atrium when the left ventricle contracts. MR may be primary or secondary:1
This is a companion discussion topic for the original article at https://patient.info/doctor/mitral-regurgitation-pro