Anyone have trouble with heart arhythmias? I have been a 2-3 cup of coffee per day person for a long time, but in the last year I notice that occasionally there is an extra beat, then longer pause than normal, then normal heart rhythm. It can happen at rest but is more frequent when the heart rate is higher. I do not feel weaker. I have cut the caffeine down to 1 cup of black tea maximum and it seems to be going away. I ride 120 miles/week on average, mostly commuting back and forth to work. Yes I'm going to the doctor but I'm interested in other cyclists perspectives. thanks.