Ace the Aircraft Electronics Technician Exam 2026 – Soar to New Heights!

The main idea here is how long and how many rescue breaths to give during CPR. When you provide ventilations, the goal is to inflate the lungs just enough to move air in and see the chest rise, without forcing excessive air into the stomach or disrupting the CPR rhythm.

Two breaths, each about one second, is the standard sequence. Each breath should be short enough to avoid over-ventilation and should cause a visible chest rise, confirming air is entering the lungs. Delivering two quick breaths at the start helps establish ventilation without interrupting the ongoing cycle of compressions for too long. Longer breaths or more breaths can raise intrathoracic pressure, reduce venous return to the heart, and waste time that could be used for chest compressions.

So, the best choice describes two one-second breaths, which aligns with how rescue breaths are taught to be performed in CPR to balance effective ventilation with CPR efficiency.