Add Yahoo as a preferred source to see more of our stories on Google. Electrocardiograms, or ECGs, record the electrical activity of your heart. Randy Faris/The Image Bank via Getty Images Your ...
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How defibrillators really work, explained with science
Understand how defibrillators work to restart the human heart.
Defibrillators are life-saving devices designed to restore the heart’s normal rhythm during sudden cardiac arrest. They are widely available in schools, airports, gyms, and public spaces - but despite ...
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