Imaging Characteristics
The mean LA diameter for the total cohort was 4.4 ± 0.7 cm (Table 2). The mean LAVi was 77.5 ± 26.2 ml/m2. The mean left ventricular ejection fraction (LVEF) was 57.2 ± 9.1 %. Patients presenting with atypical AFL had greater mean LA diameter (4.6 vs. 4.4 cm, p=0.04) and LAVi (85.1 vs. 75.4 ml/m2, p=0.03) compared to the recurrent AF cohort. Patients in the recurrent atypical AFL cohort had decreased LVEF (55.1 vs. 58.2 %, p=0.01) compared to the recurrent AF cohort.