Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Heart Murmur ?
    ### Response:
    Doctors use a stethoscope to listen to heart sounds and hear heart murmurs. They may detect heart murmurs during routine checkups or while checking for another condition.
                
If a congenital heart defect causes a murmur, it's often heard at birth or during infancy.
    