Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Heart Block ?
    ### Response:
    Heart block has many causes. Some people are born with the disorder (congenital), while others develop it during their lifetimes (acquired).
                
Congenital Heart Block
                
One form of congenital heart block occurs in babies whose mothers have autoimmune diseases, such as lupus.
    