The first thing I noticed about atrial fibrillation had nothing to do with my heart or chest.  The first thing I noticed was that my lips for some reason felt tingly.  I would only notice this in the evenings, when I had settled down and was watching television. My lips would have a strange cold, stingy sensation. After a couple of days of this, I decided I must be anxious and hyperventilating.  Always one to go searching for clues about medical questions on the net, I began looking up...