I have a 52 year old friend with whom I do a couple of long rides with every year. This guy is in extremely good shape. He's a Crossfit competitor with a lean (six pack) kind of athletic build. Over the past year he's gone to a vegetarian diet and is about the most health conscious and knowledgeable person I know. On our ride in April, he announced on the intercom that he wanted to stop for a few minutes. One of the guys chastised him saying we're going to stop for lunch in about 10 miles. A few minutes later he said he wasn't feeling good and was stopping so we all rounded up in the shade off the road where we heard that his heart was racing and that he "just didn't feel right." It passed after about 20 - 30 minutes and we rode on to lunch.
After lunch it happened again, and again after about 20 minutes he felt he was good to go. We stopped early that day and just relaxed for the afternoon speculating that it might be food related. He normally doesn't have much caffeine or sugar in his diet and that morning, boys being boys, we all went out for a big pancake breakfast. So his first thought was that it was triggered by the coffee.
He skipped the coffee and pancake the next day and was fine. On the next day, he had another big pancake but still skipped the coffee and had another episode later in the morning. At the time he was just happy that he felt he could drink coffee and skip the pancake - which he did for the rest of the trip and had no further problems - well, at least that he admitted to.
But now, based on what happened to Ryno, I'm wondering if the big sugar/caffeine change in his diet triggered an afib attack or if it was blood sugar related. In hindsight, hearing what happened to you Ryno, I feel we all took these event too lightly.
The crazy thing is that of the four of us, he's by far in the best shape and youngest of the group. The rest of us are 60 years old, carrying a few extra lbs in our abdomen, and probably don't exercise as much as we should.
There's probably a moral to this story but I'm not sure what it is other than listen to your body and no harm ever came from just stopping under a shade tree with a bottle of water until you feel solid to ride.
'16 R1200GS Triple Black
'16 KTM Super Duke 1290R
'18 Yamaha WR250R