Hi. I have had a couple of episodes of rapid heartbeats in the past, but this past year I began getting more frequent episodes that drove me to the emergency room a few times and once I was hospitalized overnight. I was put on diltiazem because my Afib pushes my heart rate over 200bpm. My Afib is now constant and I am dizzy all the time. I asked my doctor for a referral and he would not give me one. He said that they would probably want to try ablation and that the risk was substantial and often the Afib comes back. We have never tried any drugs to control the heartbeat and I have never been checked by a specialist. Has anyone else had a problem like this?