Depending on a multitude of variables, a small flow of electric current can do extensive damage. The length of exposure to electric current, the path of current flow, and the size of surface area of electrical contact can affect the severity of the shock. In the event of paralysis, artificial respiration or massage must take place as quickly as possible to minimize damage to the brain from lack of oxygen. A condition known as ventricular fibrillation can occur with currents of 50 to 200 milliamps and will continue until something is done externally to restore regular heartbeat. Immediate first aid can save a victim whose heart has actually stopped beating and whose lungs have stopped pumping.
Higher currents can result in electrical burns where tissue is destroyed.
This is a very serious situation and must always be considered a possibility even if burn injury is not visible. Remember, the current has traveled through the internals of the body so the burn effect may be beneath the skin. It should always be checked by knowledgeable medical practitioners. Normal instincts to provide assistance must be checked long enough to analyze the situation. Despite your very strong desire to help, wait until the contact with the current source no longer exists or the current source is turned off.