delivery time, fluoroscopy and total case time. Inpatient adverse events will be documented, and outpatient follow up will occur at 1 and 3 months post ablation per standard protocol, with documentation of all composite endpoints (see below). In addition, a 30 day post study phone call follow up will be performed (30 days +/- 4 days following the 3 month visit). Please see Table 1 for the schedule of events.