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Table 2 Baseline demographics, as assessed at the initial scan prior to ablation procedure

From: Optimization of late gadolinium enhancement cardiovascular magnetic resonance imaging of post-ablation atrial scar: a cross-over study

  All Subjects (n = 40) Scan 2 1.5 T (n = 30) Scan 2 3 T (n = 10) p-value
Male 31 (78%) 22 (73%) 9 (90%) 0.27
Paroxysmal AF 20 (50%) 17 (56%) 3 (30%) 0.14
CHA2DS2VASC Score 1 (IQR 0–2) 1 (IQR 0–2) 0 (IQR 0–1.5) 0.28
AF duration (years) 3.0 (IQR 2.1–5.3) 2.5 (IQR 1.9–5.0) 5.5 (IQR 2.6–12.5) 0.19
Significant Comorbidities 22 (56%) 16 (53%) 6 (60%) 0.71
Age (years) 61 ± 10 61 ± 8 61 ± 13 0.99
Weight (kg) 88 ± 17 88 ± 18 87 ± 12 0.77
Height (cm) 176 ± 7.1 176 ± 6.4 177 ± 9.3 0.60
BMI (kg/m2) 28.4 ± 5.3 28.7 ± 5.9 27.6 ± 3.1 0.48
HR at baseline scan (bpm) 61 ± 10 61 ± 8 61 ± 13 0.99
Sinus rhythm at baseline scan 25 (62.5%) 19 (63%) 7 (70%) 0.70
LV ejection fraction (%) 60 ± 10 62 ± 10 58 ± 11 0.41
LA size (ml) 121 ± 32 122 ± 37 119 ± 19 0.75
LA fibrosis at baseline (%) 36.0 ± 13.9 36.7 ± 15.1 33.9 ± 9.3 0.49
LA ejection fraction (%) 30 ± 18 29 ± 19 34 ± 12 0.41
LV native T1 time at baseline scan (msec) 988 ± 22 991 ± 24 985 ± 21 0.33
  1. P-value is for comparison between patients that underwent scan 2 in 1.5 T versus 3 T scanners
  2. LA left atrium, LV left ventricle, BMI body mass index, HR heart rate, bpm beats per minute.LA fibrosis was determined on manual segmentation of the left atrial wall, and thresholded at an image intensity ratio of 0.97 to the blood pool mean- see Online Supplement for details [26]