Heart Palpitations without chemo - could it be a side effect of AIs?

Good luck with your cardiologist. The electrical system of the heart is a wonderful thing. My (brilliant) cardiologist’s offsider is a heart surgeon, who recommended ablation. My cardiologist and I weren’t that keen, at least not till we tried some less invasive options! Gradually the problem is resolving, which is really good, with limited medication. Hope you get a similarly good result.