Electrical shocks applied to asystolic hearts to restart them is a classic.
The shock serves to stop fibrillation and to induce a rhythmic firing of the neves, that’s why it’s called defibrillation. Fibrillation is random firing of the nerves, asystole is no firing.
If I recall correctly my father told me you use an injection of adrenaline for asystolic hearts. Kind of like in Pulp Fiction. Though I think injecting directly into the heart isn’t the preferred method anymore.
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