With so many wires attached to the body, it's natural for a patient to be concerned about potential risks, though they are minimal. The electrocardiogram receives and records electrical impulses from the body, but does not send any electrical energy to the patient. EKG equipment is not the same as that used to stimulate the heart. They are passive tests that provide valuable information without discomfort beyond a slight pull to remove the pads to which the leads are connected.

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