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Table 1 Clinical characteristics of study population

From: Late outcome of surgical radiofrequency ablation for persistent valvular atrial fibrillation in China: a single-center study

  SR Group
n = 245
AF Group
n = 151
P valve
Gender, M/F (n) 132/113 88/63 0.392
Age (yrs) 55.7 ± 10.5 57.3 ± 7.8 0.096
AF duration (mhs) 33.1 ± 25.5 69.0 ± 67.7 <0.001
Rheumatic valvular disease (n) 183 108 0.488
Cerebral infarction (n) 26 12 0.382
Hypertension (n) 31 34 0.010
Diabetes (n) 22 5 0.030
Left atrial thrombosis (n) 29 39 <0.001
NYHA class (I-II/III-IV) 99/146 42/109 0.011
Pre-op BNP (pg/ml) 202.7 ± 124.7 367.5 ± 295.7 <0.001
Pre-op heart rate (bpm) 95 ± 19 75 ± 12 <0.001
Pre-op LAD (mm) 57.0 ± 8.6 61.4 ± 12.0 <0.001
Pre-op LVEF (%) 50.8 ± 6.8 49.5 ± 6.2 0.063
Redo-procedure (n) 7 22 <0.001
Combined tricuspid valve annuloplasty (n) 243 149 0.623
Combined coronary artery bypass grafting (n) 25 8 0.086
Cardiopulmonary bypass duration (min) 168 ± 44 169 ± 44 0.815
Aortic clamp time (min) 133 ± 39 130 ± 40 0.364
Duration of ventilation (hrs) 22.4 ± 19.4 34.5 ± 56.0 0.011
Intensive care unit stay (dys) 4.6 ± 2.1 5.0 ± 2.1 0.058
Post-op atrial tachyarrhythmias (n) 89 129 <0.001
AF at discharge (n) 57 123 <0.001
Post-op amiodarone (n) 79 41 0.284
Post-op metoprolol (n) 151 84 0.237
Electronic cardioversion within 6 months (n) 29 37 0.001
  1. Values are presented as mean ± SD or number of patients
  2. AF atrial fibrillation, BNP B-type natriuretic peptide, LAD left atrial diameter, LVEF left ventricular ejection function, NYHA New York Heart Association, Pre-op pre-operative, Post-op post-operative, SR sinus rhythm