Yeah Straffo, CPR= Cardiopulmoanry resuscitation. All lifeguard positions I have ever seen have had a mandated CPR and First Responder training prior to duty. Fact is, sudden cardiac death excepted, almsot exclusively all deaths are immediately preceded by respiratory compromise or arrest. This leads to the acronymof ABCs.
A=airway
B=breathing
C=circulation
Again with the exception noted above, most drownings are a result of respiratory issues, in which the heart keeps beating and supplying (albeit hypooxygenated) blood to the vital organs, including the brain.