I just was told I have afib. I had had it once 10 years ago and did not know I had it again until today when it happened during a colonoscopy. The Dr's say no - They think I have had it throughout. I have read the previous post and can't really say I felt any of these unless it was a shorteness on climbing steps, etc. I am 80. Is anyone else on this thing my age and have not known they had afib?