The purpose of the trial is to find out if the Grid X Mapping Catheter and EnSite X EP System with EnSite X Software v3.1.1, the devices that are being studied, are safe and effective in treating Chinese patients who have atrial fibrillation. Participants will receive a procedure called catheter mapping and ablation to treat their abnormal heart rhythms and are required to complete 4 follow-up visits at 7 days, 3 months, 6 months and 12 months after the procedure for checkups and tests.
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Rate of specified device and/or procedure-related serious adverse events
Timeframe: From the study procedure to subject's discharge from the hospital
Proportion of subjects with ablation targets identified by HD Grid X catheter
Timeframe: During the study procedure