What should the lone rescuer begin with when someone is in cardiac arrest?

When a lone rescuer responds to a situation involving a person in cardiac arrest, the appropriate first step is to begin with cardiopulmonary resuscitation (CPR) as soon as possible. This involves giving chest compressions to maintain blood flow to vital organs. The common protocol teaches that after calling for emergency help, the rescuer should start with 30 compressions followed by two rescue breaths if they are trained to provide ventilations.

Starting with 30 compressions is essential because it facilitates immediate action, helping to maintain circulation until advanced medical personnel arrive or an automated external defibrillator (AED) is available to defibrillate the heart if indicated. This approach emphasizes the importance of fast and effective intervention in cardiac arrest scenarios where time is critical for survival.

Defibrillation is crucial, but it comes into play after CPR has been initiated and should be done as soon as an AED is available. The sequence of CPR starting with compressions is vital because it maximizes the chance of successful resuscitation by providing oxygenated blood to the brain and vital organs. Therefore, understanding the protocol of initiating CPR by performing 30 compressions reflects the established life-saving techniques prioritized in emergency medical response procedures.