I feeling flutter and flip flap like in my chest having been diagnosed with VSD & Atrial fibrillation for which I take cardrone 100 & Acitrom I mg daily. When I undergo ECG after pounding either for full day intermittently oo occasionally .what could b possible cause though I am on glycomet850 mg & thyroxine 75 mg for diabetes & hyperthyroidism though I am now accostmed with this episode but at times I feel scared with pounding of heart either with tachycardia or bradycardia. I feel as if veins of my heart are pounding. What should I do as VSD is very small from left to right shunt & does not need surgery. please advice any more medicine for this pounding. I am 60 years old and fed up due to taking of medicine s.