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

The ideal ratio of compressions to breaths in CPR for adults is 30 compressions to 2 breaths. This ratio is based on guidelines established by the American Heart Association and is designed to optimize the effectiveness of CPR by maintaining blood circulation while also providing oxygen to the victim.

In adult CPR, performing 30 compressions before giving 2 rescue breaths ensures that there is a continuous flow of chest compressions, which is critical for maintaining blood flow to vital organs during cardiac arrest. The compressions are intended to create pressure in the chest cavity, pushing blood to the heart and brain, while the rescue breaths provide the necessary oxygen.

The other options reflect outdated guidelines or incorrect ratios that do not align with current CPR standards. Thus, adhering to the 30:2 ratio is essential for maximizing the chance of survival in a cardiac emergency.