We are talking about two completley different things. Chest compressions are given using your hands. Do not confuse chest compressions with the procedure that shocks the heart with electricity.
Here is information on defibrilllators, which deliver the electrical pulse, from External Defibrillators
"They are used in emergency situations on patients who have collapsed due to sudden cardiac arrest. When used in the first few minutes following collapse, these devices often save lives.
External defibrillators are used in many settings by medical professionals, emergency responders, and by trained and untrained bystanders. The technology is based on decades of research and evolving knowledge."
The parts that go on the chest to deliver the shock indeed are called paddles.
Perhaps Ray will come along and comment further.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.