It’s interesting. I read a book called THE PERFECT MACHINE about the Hale Telescope at Mount Palomar, George Hale being the namesake and progenitor of the thing. This book contained the information that George Hale suffered from “The Whirligus” as he called it, episodes of which he had to “lie down” to endure. It reminded me of my experience, although his sounded much worse. So thinking about it, you have to wonder. It was attributed to “nervous exhaustion” in those days.
Sounds like high blood pressure to me.