What is the best step to take immediately after 30 chest compressions?

After performing 30 chest compressions during CPR, the most appropriate next step is to give 2 breaths. This sequence of providing compressions followed by breaths is part of the cycle in basic life support for adults, children, and infants. The chest compressions serve to circulate blood to vital organs, while the breaths provide oxygen to the lungs.

Giving 2 breaths immediately after the compressions helps to ensure that oxygenated blood can be sent to the brain and other critical organs, supporting their function until advanced medical support can take over. This rhythm of 30 compressions and 2 breaths is crucial for maintaining circulation and oxygenation during a cardiac arrest scenario.

Other options, like checking for a pulse, immediately applying AED pads, or reassessing the person's condition, would disrupt the flow of CPR and potentially delay critical life-saving measures. Continuous compressions and prompt breaths are essential in maximizing the chances of survival until further help arrives.