Curious if anyone else has every experienced this. Occaisionally when I am riding I will get a heart rate spike. I will be riding along with my heart rate about 145, which is about my average when I ride, and my heart rate will spike to 195 or 200 for about 8 or 10 seconds, then it will drop back down. When it drops back down it will drop down lower than what it was before the spike, like down to around 120 or 115. Then slowly it works back to normal again. All this happens in a span of 2-3 minutes. I can deel the spike, so I don't believe it is interference with the HRM. I feel fine, it doesn't seem to make me feel bad or anything. It does not happen on every ride just occaisionally, like today it happened aboyd 13 miles into a 25mile ride. And before you say it, yes I have seen a doctor. They ran all kinds of test, EKG, Echo Cardiagram, Stress test, wore a heart monitor for a month, even a heart cath. Everything turned out fine. Just curious if anyone else every experienced sinular symptoms.