I've been treated by Dr Cheng for over 10 years now and I feel very fortunate to have him as my doctor. He's taken care of both atrial flutter and atrial fibrillation for me. We tried meds when I was first had issues. He was doubtful that would help but said the meds work with a small percentage of patients. When that had little effect I had a cardioversion. This worked perfectly for several years before new symptoms popped up. A heart ablation took care of that and I have been fine ever since. He warned me that another ablation may be needed some day, but so far so good. He's a world-renowned expert in the field of arrhythmia and teaches at Baylor College of Medicine. He also leads a research team at the Texas Heart Institute. I highly recommend Dr. Cheng.