Cardiopulmonary resuscitation

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A man doing chest compressions.

Cardiopulmonary resuscitation (CPR) is emergency first aid given to a person who has had a heart attack cardiac arrest. It can be done by anybody, but people are often told not to try unless they have received proper first aid training. CPR does not start a person's heart again, but it can keep the blood (which carries oxygen) flowing around the body long enough for proper emergency treatment to be given, if it is done properly.

CPR is normally started on a person who is not breathing and is unconscious. It is continued until the heart can be restarted or the cause is diagnosed. CPR consists of regular compressions (pressing down) of the chest and rescue breathing. If a person's heart is working properly but they are not breathing, the aided breathing is called artificial respiration. The aim of CPR is to keep a small amount of oxygenated blood flowing to the brain and heart so that, if they are successfully resuscitated, they are not permanently brain damaged

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