All infants (birth-1 years old)
2. Children (up to puberty)
3. Anyone found already unconscious and not breathing normally
4. Any victims of drowning, drug overdose, collapse due to breathing problems, or prolonged cardiac arrest
Simply, compression-only CPR is reserved for cardiac arrest (heart attacks). More specifically, when you see someone have a heart attack and fall in front of you. But, if you find a person unconscious and you weren't there to see the heart attack, use the compressions/rescue breaths combination. Compressions/rescue breaths are also used for drowning victims. Essentially, when a person stops breathing before cardiac arrest.