That will be up to your Dr. ACE inhibitors, ARB's, diuretics, Beta Blockers etc. up to your Cardiologist... Have you received a referral from your Dr. yet, or is he planning on treating you for the time being?
CoQ 10 or Ubiquinol as suggested by maldorf would be a good start.
TRT @ therapeutic doses/ range within normal limits, shouldn't be a problem, ultimately up to you and your Dr. though. It's not the testosterone that can kill you it's the supraphysiological levels of test long term that leads to health problems...
This was caught early. Time for a reevaluation of goals I would say. Go for lean and ripped now
you can still be fit, healthy, strong, and probably better off in the end longevity wise with a few changes now...