Welcome to HCM,
After going through your history it is clear that you have intermittent Atrial fibrillation
but it is not cleat what is the cause for it it would be prudent to consult a Cardiologist
specially dealing in this field of Electro physiology.
We must know it here any cardiac abnormality like valvular stenosis,or any Cardiomyopathy
, Conduction tissue abnormality or any metabolic problem because if primary cause is treated then A.Fib can be converted to sinus rhythm
, you have paroxysmal A.Fib.
Blood sugar and full stomach do not cause usually this type of tachycardia
EPS the sensitive area is mapped and it can be treated by radio frequency ablation or Ultrasound energy or even surgery called mini maze procedure.
Hope this helps you.