Diastolic dysfunction is a pretty common diagnosis, and amyloidosis is fairly rare. While I don't disagree with seeking treatment at a a reputable heart hospital (Mayo in particular is rated among the best in the world), this issue can be caused by so many different conditions, many of which are treatable with medication. While they can't "cure" the diastolic dysfunction since it is caused by the anatomy of the heart, they have many drugs which can treat the symptoms and improve the filling of the heart. Please do seek treatment at good heart center, but please do not assume that what you have cannot be treated or that your prognosis is terribly poor.

People who have Hypertrophic Cardiomyopathy as I do almost all have some degree of diastolic dysfunction, and most of them live a normal lifespan without major disability.