I am a 62-year-old female and had an ablation for afib and aflutter December 29, 2017. I was born with a congenital heart defect (hole in my heart), but I had surgery at 5 years old to correct it. I have led a fairly normal and active life prior to November of last year when these symptoms occurred. I am attributing current heart issues to the stress of returning to work too soon after having open incision repair for a couple of ventral hernias in July 2017. I was completey exhausted and felt pressured to return to work for financial reasons. I work with special needs children and literally dragged myself to work everyday with a 45-minute commute each way. After looking back at my tests results right after surgery, I was surprised to see my magnesium level was below the low end of normal but no one on my healthcare team suggested taking magnesium. I was thinking of supplementing with magnesium, but I am currently taking 25 mg extended release metoprolol once a day and flecainide 100 mg twice a day. I tried to cut back on the flecainide via doctor's instruction, but my I started getting bouts of tachycardia (but in NSR, no afib) on 50 mg twice a day. I am always exhausted and now have muscle aches taking these meds, and I thought magnesium may help. Anyone have any experience or suggestions as I am nervous to start a supplement while still on the heart meds? I just started reading Dr. Carolyn Dean's book on magnesium. I don't see my EP until April 30. I just feel worse than even before the ablation, but I know it's just been three months since I had it. I am glad I found this site. It gives me hope.