The Full form of CPR is Cardio-Pulmonary Resuscitation. In CPR, cardio means “heart” and pulmonary means “related to lungs” and Resuscitation is a medical word which means “to revive”. CPR is considered as a life-saving technique used in medical emergencies such as cardiac arrest or heart attack. A cardiac arrest may be caused by a heart condition, drowning, suffocation, electric shock, etc. This technique involves a combination of chest compression and mouth-to-mouth rescue breathing. It helps to restore blood circulation to the brain and heart until medical treatment is available; it delays the tissue death and damage to the brain. People who often handle emergencies like lifeguards, doctors, firefighters are trained in providing CPR. You don’t need any special equipment to perform CPR. You just need to perform it in a proper sequence or in order as: Chest compression, Airway and then Breathing. Furthermore, to perform CPR, you must ensure that the patient is lying on his back on a firm surface (known as supine position). It makes CPR easy and effective as it allows the effective compression of the sternum. In addition to this, the person giving chest compressions should be positioned high enough so that he can properly compress the chest.