How your heart works: two pumps, one spark, and what a heart attack really is
Why CPR works: how pushing on a chest moves blood
Pushing on a chest cannot fix a heart in chaos. Still, it can keep a person's brain alive for minutes. What do the pushes really do?
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1
You push hard and fast on the middle of Rono's chest, again and again. This is CPR.
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His heart only quivers, and your hands are outside his body. Yet each push sends some blood to his brain.
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