Final answer:
During CPR, after every 30 chest compressions, two rescue breaths should be given to the patient.
Step-by-step explanation:
After every 30 compressions during cardiopulmonary resuscitation (CPR), the rescuer should open the airway and give two rescue breaths. CPR is a vital emergency procedure used when the heart stops, and it involves chest compressions to manually push blood through the heart and into the systemic and pulmonary circuits, providing oxygen to the body, especially the brain. High-quality chest compressions are emphasized over artificial respiration, with a recommended compression depth of at least 5 cm and a rate of 100 compressions per minute, which is to the beat of "Staying Alive" by the Bee Gees.