Yeah...My grandfather died of heart failure at 63, my dad died of heart failure at 53. Had my first one at 48, my second one at 55, my 3rd one at 58. 64 is definitely too young.
Gosh. I’m so sorry about your dad and granddad. My father and grandfather also died young of heart attacks as did my brother. It is now consider a family risk after my brother passed instantly at 63. :(. I am so glad you have made it through all of your heart failures. You’re a walking miracle. May God continue to bless you.