Lichun Wang, Jiangui He, Anli Tang, Chong Feng, Jun Liu and Yili Chen
We describe a case of 47-year-old man who suffered a sinus node reentrant tachycardia and a typical counterclockwise cavotricuspid isthmus dependent atrial flutter. The dynamic isopotential mapping with non-contact mapping system showed that source and propagation sequence of the sinus node reentrant tachycardia almost identical to that of sinus rhythm, only the foremost was slightly different. The ablation on the source point terminated the tachycardia. The characteristics of the target electrogram in tachycardia were fractional and before onset of surface ECG P wave.
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