Buildup of carbon dioxide in a certain type of baby pillow reportedly could cause the condition. First aid for restoring normal breathing as quickly as possible is essential. If a person is choking, try to clear the blockage from his or her throat with your finger. The Heimlich maneuver may also be useful in forcing out the blockage. With drowning and smoke inhalation, first get the person to safety.
Electrical shock poses special problems.
Before any treatment can begin, it is essential to cut off electricity or physically to remove the source of power, whichever can be done most quickly.