I had a rapid heartbeat (docs called it tachycardia) during exercise/stress for many years. It was bothersome, but I never felt it to be life-threatening. However, I felt that I wanted it fixed while I was young and reasonably healthy, so I got an ablation. That ablation fixed the issue for over 20 years when it recurred again, but this time, they termed it as afib. Anyway, that episode prompted an ECG (echo cardiogram) that found an aneurysm which I subsequently had fixed. Keep an eye on this, but I would strongly recommend the ablation as they are usually pretty effective.