Yes, there's evidence that it works, but nobody should self medicate to cover up a symptom without finding the underlying diagnosis....
https://pubmed.ncbi.nlm.nih.gov/1679...event%20pauses. Little dolphin had a complete cardiac work up first.
You may stop your palpitations but go on to have your fatal heart attack with a normal cardiac rhythm. Win one, lose one. It all evens out?