Well Joy,
Back to your original post--he really does seem to be in the best place, in the best hands, whilst going through this--and great the Radiologist and the Cardiologist are talking to each other--and to you all as a family.
I think tears come sometimes when you feel secure enough to let them come--and they will have reassured your dad just how much you care and he'll maybe feel able to shed his own when he feels that need.
You sound like an incredibly strong family with a lot of love between you and I'm sure that will help see you all through.
Keep giving us updates, always in my thoughts,

Brenda x