This document provides instructions for performing basic life support (BLS) and using an automated external defibrillator (AED) for cardiac arrest patients. It explains that when someone experiences cardiac arrest, swift intervention with BLS skills like chest compressions and ventilation is crucial before emergency services arrive. Early defibrillation within 1-2 minutes of collapse can result in over 60% survival. The key steps of BLS include opening the airway, performing chest compressions at a rate of 100 per minute to a depth of 5 cm, and ventilation. An AED should be used as soon as available by turning it on, attaching pads to the bare chest, following its voice prompts to analyze the heart rhythm and deliver a shock