September rolled around I started craving coffee, after months of none! So I decided to have a cup of decaf to start the day each day last week. Only one week of doing this and my heart rate is up by 10 bpm. How is this even a thing? So whatever is in the coffee is what causes it, and it is not the caffeine? I will not have any this week to see if it becomes normal again. Maybe it was just a stressful week last week!