Following American Heart Association (AHA) guidelines, the procedure for CPR done by a trained person prior to the arrival of emergency personnel or use of medical equipment can involve which of the following?

Delivery of chest compressions and ventilations

Delivery of chest compressions only

CRP is a set of measures in sequence carried out by a lay person on the spot, a trained lay person (who took a rescue course), health and / or rescue professionals, which aim to provide the first service with basic life support to the victim until arrival of advanced life support.