## **Core Concept**
The American Heart Association (AHA) guidelines for cardiopulmonary resuscitation (CPR) emphasize the importance of timely and effective interventions during cardiac arrest. The 2010 AHA guidelines specifically addressed the ratio of chest compressions to ventilations during CPR by two rescuers.

## **Why the Correct Answer is Right**
The correct answer, , reflects the updated recommendation from the 2010 AHA guidelines for CPR. According to these guidelines, for two-rescuer CPR in adults, the recommended ratio of chest compressions to ventilations is 30:2. This means that for every 30 chest compressions, two ventilations are provided. This ratio is aimed at maximizing coronary and cerebral perfusion while also ensuring adequate oxygenation and ventilation.

## **Why Each Wrong Option is Incorrect**
* **Option A:** is incorrect because it does not align with the 2010 AHA guidelines for two-rescuer CPR in adults.
* **Option B:** is incorrect because, although it might seem close, it does not accurately represent the recommended ratio.
* **Option D:** is incorrect because it suggests a different ratio that is not supported by the 2010 AHA guidelines.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the 30:2 ratio for CPR is specifically recommended for two-rescuer CPR in adults. This guideline helps in providing high-quality CPR, which is crucial for improving survival rates and neurological outcomes in cardiac arrest patients.

## **Correct Answer:** .