I am 26 years old I had a heart ablation in 2012 i dint know what they called it but my heart rate would be super high them drop so low i passed out. .. since the ablation ive been pretty normal but have not followed up. I am currently experiencing rather hard thumping of my heart a little pain and real bad pressure headach with palpatations. Also ive been a little dizzy and had poor circulation. My mom's side of the family has a lot of heart problems. My dad's family has a history of stroke wick killed my great grandmother in her 20s . What could it be?