With regard to CPR, what is the correct compression to breath ratio?

The correct compression to breath ratio for CPR is 30 compressions to 2 breaths. This guideline is established by the American Heart Association (AHA) for adult victims of cardiac arrest. The 30:2 ratio is intended to optimize the effectiveness of chest compressions while still providing necessary breaths to sustain oxygen supply during resuscitation efforts.

The focus during CPR is to maintain circulation through effective compressions, and the 30 compressions performed rapidly help to increase blood flow to vital organs. After every cycle of 30 compressions, giving 2 breaths helps to ensure that oxygen is delivered to the lungs, allowing the blood being pumped to circulate oxygen to the heart and brain. This ratio is easy to remember and provides a balance between chest compressions and ventilation, ultimately increasing the chances of survival in cardiac arrest situations.

Other ratios provided do not adhere to current CPR guidelines for adults. For instance, the 15:2 ratio is typically used for children and infants, while the one-breath option does not provide enough ventilation to be effective in adults.