Hi all. I have either IST or AT and am still trialling medications to help symptoms. Am currently on 2.5 Bisoporol which has brought heart rate down considerably but BP is now quite low so still feel unwell. During the night had had awful chest pains again. EP letter suggests either fludorocortisone or taking ivabradine. Anybody else still had pain while on Bisiporol? Any thoughts on medication?