Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Electrocardiogram? ?
    ### Response:
    An electrocardiogram (EKG) has no serious risks. It's a harmless, painless test that detects the heart's electrical activity. EKGs don't give off electrical charges, such as shocks.
                
You may develop a mild rash where the electrodes (soft patches) were attached.
    