3 doctors weighed in:

Why is an electrical shock delivered to correct abnormal heart rhythm?

3 doctors weighed in
Dr. Bennett Werner
Internal Medicine - Cardiology
2 doctors agree

In brief: Highly effective

It "sets the clock back to zero" so to speak.
It synchronizes all the electrically conducting cells in the heart to begin their cycle at the same instant. It interrupts and stops abnormal rhythms. It doesn't hurt and there are generally no side effects so in that regard, it's better than medicines. The downside is that one must be put to sleep, albeit briefly, for it.

In brief: Highly effective

It "sets the clock back to zero" so to speak.
It synchronizes all the electrically conducting cells in the heart to begin their cycle at the same instant. It interrupts and stops abnormal rhythms. It doesn't hurt and there are generally no side effects so in that regard, it's better than medicines. The downside is that one must be put to sleep, albeit briefly, for it.
Dr. Bennett Werner
Dr. Bennett Werner
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