Baseline Characteristics:
A total of 80 patients who underwent CBA for paroxysmal AF were included in our analysis. Their baseline characteristics (Table 1 ) were as follows: age 60.7 ± 9.7 years, males 68.8% (n=55), body mass index (BMI) 31.5 ± 6.9 kg/m2, baseline LVEF 57 ± 8 % and recurrence of AA 23.8% (n=19). The majority of the study group (82.5%, n=66) had a typical PV anatomy with four distinct PVs, while atypical anatomy with an LCPV was seen in 17.5% (n=14) patients. Other atypical combinations of RMPV with LCPV (n=3) and RMPV with the four distinct PVs (n=5) were also present. The study population demographics and clinical data by the presence or absence of the LCPV are shown in Table 2 . Additional touch up with RF ablation was necessary for 14% (n=2) versus 6% (n=4) of patients in the LCPV versus typical PV anatomy group, respectively. The baseline characteristics were similar between the two groups except for the longer duration of total fluoroscopic time (TFT) for the LCPV group.