Table 2

Procedural details and complications stratified by BMI category

All (N=3333)Normal BMI (BMI<25.0), n=728Overweight (BMI 25.0–29.9), n=1537P-value (overweight vs normal)Obese (BMI ≥30.0), n=1068P-value (obese vs normal)
First procedure2608/3332 (78.3%)584/728 (80.2%)1182/1536 (77.0%)842/1068 (78.8%)
Procedure duration (min)
 N313968214410.2321016<0.001*
 Mean (±SD)164.4 (65.3)159.4 (65.6)163.2 (64.9)169.7 (65.2)
Radiation dose (mGy)
 N8321774060.002* 249<0.001*
 Mean (±SD)786.1 (1595.6)768.8 (2836.7)755.4 (1109.2)848.5 (897.7)
Ablation strategy in paroxysmal AF (%)
 Roof line105/258 (40.7)22/67 (32.8)53/120 (44.2)0.1330/71 (42.3)0.254
 Mitral isthmus line34/197 (17.3)6/1/1950 (12)19/92 (20.7)0.1969/550.523
 Posterior line14/17 (82.4)1/2 (50)7/9 (77.8)0.4916/6 (100)0.25
 LA CFAE123/2238 (5.5)24/509 (4.7)70/1061 (6.6)0.14129/668 (4.3)0.759
 RA CFAE46/2238 (2.1)10/509 (2.0)26/1061 (2.5)0.54710/668 (1.5)0.539
Complications (%)
 Groin haematoma (requiring intervention/transfusion)10/3353 (0.3)4/731 (0.5)3/1545 (0.2)0.2213/1077 (0.3)0.45
 Pseudoaneurysm15/3352 (0.4)2/730 (0.3)6/1545 (0.4)17/1077 (0.6)0.327
 Pericarditis25/3349 (0.7)8/728 (1.1)9/1546 (0.6)0.1828/1075 (0.7)0.431
 Cardiac perforation47/3348 (1.4)7/728 (1.0)21/1546 (1.4)0.42319/1074 (1.8)0.158
 Atypical atrial flutter7/3349 (0.2)0/728 (0.0)3/1546 (0.2)0.5564/1074 (0.4)0.153
 MI0/3348 (0.0)0/728 (0.0)0/1546 (0.0)0/1078 (0.0)
 Stroke2/3356 (0.1)1/732 (0.1)1/1546 (0.1)0.540/1078 (0.0)0.404
 TIA9/3356 (0.3)2/732 (0.3)3/1546 (0.2)0.6594/1078 (0.4)1
 Phrenic nerve palsy12/3356 (0.4)2/732 (0.3)6/1546 (0.4)14/1078 (0.4)1
 Atrioesophageal fistula2/3356 (0.1)0/732 (0.0)0/1546 (0.0)2/1078 (0.2)0.518
  • *P<0.05.

  • AF, atrial fibrillation; BMI, body mass index; CFAE, complex fractionated atrial electrogram; LA, left atrium; MI, myocardial infarction; RA, right atrium; TIA, transient ischaemic attack.