Baseline Clinical Characteristics
A total of 336 patients underwent first repeat ablation for recurrent AF
or atypical AFL at our center from January 2012 to July 2019. Of these,
234 (69.6%) patients underwent repeat ablation for AF, and 102 (30.3%)
underwent repeat ablation for atypical AFL. The mean age was 63.7 ± 10.7
years in the total cohort, and the majority were white and male (Table
1). The mean body mass index (BMI) was 29.9 ± 5.5
kg/m2, and mean CHA2DS2-VASc score was 2 ± 1.4,
respectively, with no significant difference between cohorts. Patients
with atypical AFL were older than those with recurrent AF (65.6 vs. 62.9
years, p= 0.03) and had a greater proportion of diabetics (22.1 vs. 11.0
%, p=0.01). A greater proportion of the patients in the recurrent
atypical AFL cohort had a history of prior cardioversion (58.8 vs.
43.2%, p=0.01) and cardioversions in the preceding one year (47.1 vs.
28.2 %, p <0.01) respectively. Similarly, a greater
proportion of the patients in the recurrent atypical AFL cohort were not
prescribed antiarrhythmic drugs (AAD) before the repeat ablation (43.1
vs. 29.0 %, p<0.01) as compared to the recurrent AF cohort.
Other comorbidities remained comparable between the two cohorts.