My cardiologist suggested i should have a defibrillator implanted. is there one that doesn't need an operation?

Not that I know: Implanted means it has to be surgically inserted so not able to do so without an operation. You could consult with an acupuncturist and see if that might help prevent the need for a defibrillator, ...In no way am i suggesting you do not listen to your cardiologist...Just suggesting you look at acupuncture to see if it could help.

Defibrillator: All defibrillators need to be implanted under the skin.