Missed beats, palpitations, fluttering sensations may or may not be serious and may or may not need to be treated. For many years I had palpitations on an infrequent basis and skipped beats. As time went on, things changed . Holter monitor picked up atrial tachycardia. Told you could treat or not treat or take magnesium. 6 months later, symptoms became frequent, annoyingly and unnervingly persistent. This time the holter monitor picked up ventricular tachycardia. Cardiologists jump to attention when that shows up. And that needs to be treated . Sometimes with a betablocker and sometimes with a calcium channel blocker. I take metoprolol.
Moral of the story, if you are experiencing any of the above always have it checked out.