What is the correct compression-to-ventilation ratio for adults in CPR?

The correct compression-to-ventilation ratio for adults in CPR is 30:2. This means that for every 30 chest compressions given, 2 rescue breaths should follow. This ratio is based on guidelines from organizations such as the American Heart Association, which emphasize the importance of high-quality chest compressions combined with effective ventilation to optimize blood circulation and oxygenation to vital organs during cardiac arrest.

The rationale behind using a 30:2 ratio is grounded in the need for a balance between compressions and ventilations. Chest compressions are critical for maintaining circulation, and the 30-compression segment allows for the delivery of sufficient blood flow during the compressions, while the two breaths provide necessary oxygen until advanced life support can be provided.

Using this specific ratio has become standardized because it is efficient and manageable in a high-stress scenario like a cardiac arrest, ensuring that rescuers can effectively provide assistance without losing focus or becoming fatigued.