It might be helpful to clarify here that in general, if you’re performing CPR, it is because the heart has stopped beating and is unlikely to beat again on its own without medical treatment.
When you perform chest compressions, you are physically pumping their heart by hand — nothing automatic about it!
By pumping their heart, you allow oxygenated blood to circulate through their body.
Their cells will use that oxygen to survive, so you’re allowing cellular respiration to continue despite their heart failing to circulate blood on its own. Mostly the goal is to keep those brain cells going until help arrives!!
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