So sorry to hear this. What a lot to go through. Getting the news is overwhelming. Do you have any prostrate cancer support groups in your area? Do you live close to any of the Mayo locations?

I am not a doctor but you say he has a serious heart condition but his Dr. is recommending radical prostectomy? The oncologist/radiologist at Mayo Jacksonville and the oncologist/radiologist at UFPTI would not consider recommending surgery to me because of my heart condition.

I depend on my ICD/pacemaker also. I have a left bundle branch block and 3 areas in LV sending out PVCs. Although my heart will self pace it will go down sharply if I did not have the pacemaker especially when I take my medications. So pacemaker keeps it up and helps with pacing as I have tons of PVCs. The ICD part has saved my life about a dozen times. Over the years I have had one (since 2006) it has gone off about 12 times. Without it I would not be here.
Mayo's Pace Clinic and my electrophysiolgist are outstanding and we fine tune and add medications to address issues. I was doing Sprint Triathlons prior to my radiation treatments and have been training to do them again. I have my first one this year in November. I have been an exerciser all my life. It is why my cardiologist say I do so well even with heart failure.

I would recommend getting second and third opinions. I did and many others using Mayo Clinic Connect have commented they also have done this.