How does CPR work?
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During cardiac arrest , the heart is not beating therefore no blood is circulating throughout your body. The idea of CPR is to compress the heart hard enough to cause blood flow, particularly to your brain. Neurons have very low energy Reserves, and are very susceptible to damage from lack of oxygen. Interrupting blood flow for even a short period of time can result in neuron death, so the goal of CPR is to prevent this while attempts are made to restore a regular heartbeat.
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