The full form of CPR is Cardio-Pulmonary Resuscitation. The word ‘cardio’ means heart. ‘Pulmonary’ means related to lungs. The meaning of Resuscitation is ‘to revive.’ It is a life-saving technique that anyone can use if someone is suffering from any emergency issue such as cardiac arrest, heart attack or drowning. Such a situation may arise if someone has a heart issue, drowning, electric shock, suffocation, etc. CPR is a combination of mouth-to-mouth rescue breathing and compressing the chest. With this technique, the blood circulation to the brain and heart is restored until one gets the medical help. It prohibits brain damage or death of tissues. Professionals such as lifeguards, firefighters, doctors, etc. who handle emergency situations are trained in CPR.