My little brother worked as a Captain for a major airline for decades. He had an FAA mandated physical every six months for decades. NO heart problems were found ever. Shortly after his second Covid jab he was found to have an enlarged and inflamed heart. He is now considered disabled and permanently grounded.
So very sorry to hear about your brother. I have a younger relative who is just now joining the ranks of commercial pilots and I’m worried about him given that the shot(s) were a precondition of employment.
So he took the jab and still lost his job. That sucks. Hopefully he has a nice pension and a long life.