Rather than one big shock to the heart, a series of 5 small pulses can also restore our heart beats, scientists show. And it uses 84% less energy".
The tissue damage reduction may even be exponential!
For AEDs, the ones in public places, the risks to "amateur" users giving care on the spot is greatly reduced by lower energy delivery. Newer Defibrillators are of designs that may allow conversion to this new lower energy technique via mere software upgrade!
The greatest effect may be in the area of implantable defibrillators.