What is the appropriate compression-to-breath ratio for adult CPR?

The appropriate compression-to-breath ratio for adult CPR is 30 compressions to 2 breaths. This ratio is established to ensure that high-quality chest compressions are prioritized, which are crucial for maintaining blood flow to vital organs during cardiac arrest.

In adult CPR, the emphasis is on performing 30 continuous chest compressions before giving 2 rescue breaths. This allows for maximizing the number of compressions in a given time period, which is essential for improving the chances of survival. The 30:2 ratio is applicable for both one-rescuer and two-rescuer CPR scenarios.

Providing 30 compressions followed by 2 breaths helps keep the victim's heart and brain supplied with the oxygenated blood needed until emergency medical services can provide advanced care. The other ratios listed do not conform to current guidelines and would not optimize the effectiveness of CPR in an adult patient.