Getting an EKG seems very prudent. I had one done for a non-heart related procedure, and afterwards was basically asked: - Ever have any heart events? Heart racing, palpitations, that kind of thing? - Yes, a few times a year I've noticed events like that. Resolves in a few minutes, though. - Well, your EKG shows a slurred delta wave. Sign of Wolff-Parkinson-White syndrome. Might want to get that checked out.

I did, and it was. Fixed with ablation. No issues since. Other types of supraventricular tachycardia can also be cured with ablation.