My heart suddenly beat REAL HARD twice and went back to normal? When I was going to campus I was walking up stairs it was 6:30 AM. As I walked my heart suddenly beat hard two times about, then suddenly everything was fine. It was enough to make me stop and put my hand to my chest for a second. It felt like this for example: if you have your hand act as the heart pumping blood, but all of a sudden clenched your fist it felt like that happened to my heart. I v had these occurences before, but not as hard, just very minor. Two years ago I started getting irregular heartbeats and went to the doctor who specialized in cardiovascular problems. He put the little wires on me and the machine read my heart rate for 2-3 minutes and it was fine. He doens t know what it could be, but now this happened and I m planning to go back to the doctor sometime this week. Does anyone have an idea of what it could be? Once again just a hard heart beat and back to normal. Thanks for the help!