I'm a 47-year-old woman, with a couple of arrhythmias: a re-entry that runs about 180 beats per minute, and ends on its own; and a slower (140 beats per minute) IST or atrial tach that I get more frequently but which also ends on its own. I've had a full work-up - Holters, stress echo, CT scan of heart, loop recorder.
I'm taking Tiazac and Acebutolol, which has really decreased the frequency of episodes.