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Explain why death can occur if a heart attack is left untreated
If blood flow is not restored quick enough, the heart muscle will die from lack of oxygen and so it will not pump blood efficiently around the body for the body to function properly. When the heart muscle cells die, the heart can stop beating which is called cardiac arrest. No blood is being pumped around the body, and if blood flow isn't restored to the brain, then the brain will shut down and so will the whole body and you die.