CPR stands for Cardiopulmonary Resuscitation which is an emergency lifesaving procedure and is applied immediately when somebody’s breathing or heartbeat has stopped which has to be made to work by manually compressing the chest overlying the heart and forcing air into the lungs. It is used to maintain circulation when the heart stops pumping, usually because of disease, drugs, or trauma. This may happen after an electric shock, drowning or heart attack. CPR techniques also vary depending on the size and age of the patient. Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results. Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature.