I read somewhere he had, a few months before, been diagnosed with a heart problem. I am so sorry. I retain nothing but water. I have no idea where I read it.
Oh, there were lots of unsourced statements from “friends” who said that he had heart problems.
But his FIL Orson Bean would have known and he stated directly that he had no knowledge of heart problems. I remember clearly becasue I spent many hours reading every thread.