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Table 1 Baseline Patient Characteristics (n = 19)

From: The hybrid approach for the surgical treatment of lone atrial fibrillation: One-year results employing a monopolar radiofrequency source

Age 61.2 ± 8.6
M/F 16/3 (84.2/15.8)
BMI 27.6 ± 4.6
Hypertension 7 (36.8)
TIA/CVA 1 (5.2)
Preoperative catheter ablation  
AF 4 (21.1)
Flutter 5 (26.3)
Type of preoperative AF  
Paroxysmal 5 (26.3)
Persistent 4 (21.1)
Long-standing persistent 10 (52.6)
Prevalence of AF (68% CI)  
Paroxysmal 20.0 (16.8–23.3)
Persistent 34.7 (31.2–38.9)
Long-standing persistent 63.6 (59.9–67.1)
EHRA Score 4 [3–4]
Duration of preoperative AF (yrs.) 5 [3–8.5]
Antyarrhythmic Drugs  
Amiodaron 2 (10.5)
Dysopiramide 1 (5.3)
Flecainide 6 (31.5)
Propaphenon 1 (5.3)
Sotalol 5 (26.3)
Electrical cardioversion 15 (78.9)
Previous Catheter Ablation  
For AF 6 (31.5)
For Atrial Flutter 5 (26.3)
Preoperative Pacemaker 2 (10.5)
Anticoagulant status  
Sodium Warfarin 16 (84.2)
Aspirin 5 (26.3)
LAVI (mL/m2) 47 ± 11
LAMAX (mL/m2) 49 ± 20
LAMIN (mL/m2) 30 ± 15
LAEF (%) 38 ± 12
LA A-P (cm) 5.0 ± 0.5
LA S-I (cm) 6.4 ± 0.5
  1. Normal data were presented as mean ±1 Standard deviation (SD), non parametric data as Median and [Interquartile Range] and discrete data as percentage (%).
  2. Abbreviations: M/F: Male/Female; BMI: Body mass index; AF: Atrial fibrillation; CI: Confidence Interval; EHRA: European Hear Rhythm Association; LAVI: (Biplane) Left Atrial Volume Index; LAMAX: Maximum Left Atrial Volume; LAMIN: Minimum Left Atrial Volume; LAEF: Left Atrial emptying Fraction; LA A-P: Left Atrial Antero-Posterior Diameter; LA S-I : Left Atrial Superior-Inferior diameter.