Heart speeding up/fluttering
At random times, I feel a "fluttering" feeling in the middle of my chest. If I'm feeling my pulse at the time, it seems that my heart is beating real fast about 3 or 4 times, then resumes beating normally. Sometimes this will happen many times over a short period. It's kind of scary!
Does anyone know what this is, or if I should be concerned about it?
Also, I am a 38 year old man who is otherwise perfectly healthy and not overweight.