Mitral Valve Prolapse (MVP) By Guy P Armstrong, MD, Waitemata District Health Board and Waitemata Cardiology, Auckland Reviewed / Revised Jul 2022 | Modified Sep 2022 View Patient Education Etiology Symptoms and Signs Diagnosis Prognosis Treatment Key Points Topic Resources Mitral Valve Prolapse (With... Mitral Valve Prolapse Mitral Valve Prolapse (Echocardio... Mitral valve prolapse (MVP) is a billowing of mitral valve leaflets into the left atrium during systole.