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Cardiac arrest results in death within several minutes unless the heart is restarted. The amazing thing about the heart is that it rarely just stops dead without warning. Even when no pulse is detected, the heart may still be in fibrillation (quivering) and it is possible to restart it if an electric shock is delivered using an appropriate medical device. If you come across a collapsed person with no pulse, call an ambulance and start CPR until help arrives.

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12y ago

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