Hi Molly
There are a lot of people in the position as your husband,it does depend on how his heart is affected by it. The Royal Free Hospital in London is the only hospital who deals with it,but they liaison with local hospital,it is rare 600 cases a year.
I cannot pretend it not serious and tell you not to worry!!,but please get in touch with Ellen or Maggie,even if it’s only by E Mail I am sure she can give you some peace of mind,there are people on here who are doing well and some have not,so until the condition of his heart is completely known you are in the dark.
I hope by boosting this post up,people see it and reply,and give you a much needed boost,you could try going into Amyloid Support Site or go into the library on here,plus there are Videos on here to watch. Love Eve