Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Timothy syndrome ?
    ### Response:
    Timothy syndrome is a rare disorder that affects many parts of the body including the heart, digits (fingers and toes), and the nervous system.  Timothy syndrome is characterized by a heart condition called long QT syndrome, which causes the heart (cardiac) muscle to take longer than usual to recharge between beats.
    