Here's how us paramedics do it
Charge the defibrillator to 360 joules
Say "I'm clear, you're clear, everybody clear"
Whaa-thwack! <---kinda what it sounds like
(Note the acrid smell of burnt hair and skin.)
Check for a pulse
If you find one,hold hands and sing "You light up my life"... :)
And when you're watching TV, if the EKG looks like this:
_____________________________
1) they're not really doing CPR (which shows up on the monitor as an up-and-down waveform, really!)
2) there is absolutely no reason to shock
3) this is an indication of death, except for a few particular cases, and that efforts can be ceased