What is the recommended compression-to-ventilation ratio for adult CPR?

The recommended compression-to-ventilation ratio for adult CPR is 30:2, which means that for every 30 chest compressions, two rescue breaths should be given. This ratio is part of the basic life support (BLS) guidelines established by organizations such as the American Heart Association (AHA) to optimize the effectiveness of cardiopulmonary resuscitation. Maintaining a 30:2 ratio helps ensure that sufficient blood flow is generated through chest compressions while simultaneously providing oxygen to the lungs.

The rationale for this ratio is based on research showing that high-quality chest compressions are critical for maintaining perfusion to the heart and brain during cardiac arrest. The 30 compressions followed by 2 breaths structure allows for a continuous and efficient rhythm that can be maintained over the course of CPR.

When performing CPR on adults, it's crucial to focus on both the number of compressions and the quality of each compression, while also delivering breaths effectively, which the 30:2 ratio is designed to balance.