Sadly I have known quite a few pilots that have died from various problems, despite being apparently very fit, healthy and undergone regular (6-monthly) aviation medicals, including E.C.G.s. Some of them were suicides, with no physical problems - just mental ones.
As a profession, our regular check-ups must help "nipping it in the bud" before a sympton becomes life threatening, but even then "when your time is up".........!
Best advice is given by the medical professionals - take it.