Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Mitral Valve Prolapse ?
    ### Response:
    Mitral valve prolapse (MVP) occurs when one of your heart's valves doesn't work properly. The flaps of the valve are "floppy" and don't close tightly. Most people who have the condition are born with it. It also tends to run in families.    Most of the time, MVP doesn't cause any problems.
    