Cardiopulmonary Resuscitation (CPR) is a lifesaving and a vital emergency procedure which improves the survival chances in critical cardiac cases. Studies indicate that without CPR, brain damage can occur within minutes, and every minute of delay decreases sulvival chances by about 10%. Immediate bystander CPR can increase survival by two to three times. While nearly 50% of people in high-income countries have undergone CPR training, in India the bystander CPR rate remains alarmingly low, ranging only between 1.3% and 9.8% . Keeping the blood flow active – even partially – extends the opportunity for a successful resuscitation once trained medical staff arrive on site. Compression-Only Life Support (COLS) - is for every citizen to learn how to resuscitate a victim in cardiac arrest in Out of Hospital situations. Basic Cardiopulmonary Life Support (BCLS) - is for doctors and paramedics to resuscitate cardiac arrest victims. Comprehensive Cardiopulmonary Life Support (CCLS) - is for doctors and paramedics to resuscitate in-hospital cardiac arrest victims within the hospital. How to do CPR - COLS Dos and Donts of CPR Dos: Ensure yours and the victim's safety first Check responsiveness by tapping on shoulder and shouting "Are you alright ?" If no response Call for Emergency Services (like 112/108/102) and start chest compressions (CPR) Ensure that the victim is lying on a firm, flat surface Keep your elbows straight while performing chest compressions Perform chest compressions at a rate of 100-120 per minute Allow chest to return to normal position before giving the next compression Continue CPR till either the person is revived or medical help arrives Use an Automated External Defibrillator (AED), if and when available Don'ts Do NOT panic Do NOT delay chest compression Do NOT administer chest compression if the victim is conscious Do NOT interrupt in between chest compressions Do NOT bend your elbows while giving chest compression