You are absolutely right BOTS it can change just like that. My husband was a fit 53 year old and he felt unwell and eventually went to the Doctors with his heart racing. He was sent straight to the hospital in an Ambulance and under went a bypass involving 5 bypasses. He is on meds for the rest of his life.
I am so glad you have come through it with little effect…but it does prove that no matter how fit you are these things can still happen…and how precious life is.
You take care…