Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Holes in the Heart ?
    ### Response:
    Atrial Septal Defect
                
Many babies who are born with atrial septal defects (ASDs) have no signs or symptoms. However, as they grow, these children may be small for their age. 
                
When signs and symptoms do occur, a heart murmur is the most common.
    