You say your healing....
But you say they didn't put in an ICD implant yet.
I'm confused.
Anyway I'm naturally right handed,
They implanted my defib, in my left chest/shoulder , about 3" below the collar bone.
I can shoot , have shot, anything I want to.
I shoot a lot of big bore stuff , like 45-70, and some high power stuff ,like, 300 Winmag. Never had a problem.
Only off the right shoulder, never a problem.
I forgot about it last year , and was shooting 12 ga off bthe left shoulder with no problem,
I shoot very heavy recoil handguns, 460 magnum, S&W 50 cal, 44 mag....and very vicious recoil 50 cal black powder pistols.
Never have had a problem.
The doctor tells me not to use a chainsaw, weedeater, anything that creates EMF. .
I do, (with heavy leather gloves to dampen the vibes). Never had a problem in 2 years. I heat with wood

.
Mine is a Medtronics , and the Mfg Tech told me, (under the table) not to worry , because mine is programmed to ignore the vibrations.
Without my Defib, I would have a 5% chance to survive a bad arrhythmia , with it I have a 95% chance.
I cant stop completely living.
All this being said you need to have a heart to heart talk with your Doctors, and if possible , a closed door discussion with the Mfg Technician.
Any questions , and Ill try to help.
Jim