Clinical and anatomic predictors of need for repeat atrial fibrillation ablation

Table 2 Anatomic predictors of need for repeat ablation

Pre-ablation size parameters	Single ablation (n = 189)	Repeat ablation (n = 142)	P value
Right atrial area (cm2)1	23.0 ± 5.8	24.4 ± 5.4	0.08
Left atrial area (cm2)1	28.0 ± 5.3	29.3 ± 6.2	0.13
Pulmonary vein ostial diameter (mm)
Right superior vein	19.4 ± 4.0	21.5 ± 4.3	< 0.01
Right inferior vein	18.0 ± 3.5	19.6 ± 5.8	< 0.01
Left superior vein	17.7 ± 3.4	18.7 ± 3.0	< 0.01
Left inferior vein	17.0 ± 2.7	18.6 ± 5.0	< 0.01

Data presented as mean ± SD.

¹Data reported for 123 patients in single ablation group and 81 patients in repeat group. Comparison of cardiac magnetic resonance parameters stratified by patients who received single ablation procedure vs repeat ablation during study period.