This document provides guidance on performing cardiopulmonary resuscitation (CPR) and basic life support. It outlines the steps of the CAB sequence: checking the airway, looking for breathing, and performing chest compressions. The key steps are to approach safely, check for response, call for help, open the airway, check for breathing, perform 30 chest compressions and give 2 rescue breaths, and continue CPR until advanced help arrives or the rescuer becomes exhausted. Proper CPR techniques and following the outlined sequence are important for successful resuscitation, though complications can still occur.