What is the ratio of compressions to breaths during CPR for adults?

The appropriate ratio of compressions to breaths during CPR for adults is 30 compressions to 2 breaths. This ratio is established to ensure that the heart receives enough blood circulation through chest compressions while still providing oxygen to the lungs through rescue breaths.

Thirty compressions followed by two breaths creates a balance that has been found to be effective in increasing the chances of survival during a cardiac arrest situation. It aligns with current guidelines focused on effective, high-quality chest compressions to maintain circulation, especially since the majority of cardiac arrests occur in adults.

This method is emphasized in both one-rescuer and two-rescuer CPR scenarios, ensuring consistency in performing CPR. The other options present ratios that do not meet the established guidelines for adult CPR, making 30 compressions followed by 2 breaths the correct standard to follow.