Table 2. Low Voltage Area Burden.
| Voltage | ≤ 0.2 mV (mean area (mm2) ± SD) | 0.21 - 0.5 mV (mean area (mm2) ± SD) | ||||
|---|---|---|---|---|---|---|
| Rhythm | SR (n = 40) | AF (n = 40) | P value | SR (n = 60) | AF (n = 60) | P value |
| Mean LA | 115.89 ± 113.61 | 143.41 ± 144.23 | 0.02* | 105.78 ± 103.7 | 144.00 ± 135.24 | < 0.001* |
| Roof | 82.72 ± 117.32 | 83.68 ± 113.56 | 0.95 | 115 ± 77.14 | 150.61 ± 93.17 | 0.01* |
| Anterior | 131.8 ± 169.53 | 126.5 ± 154.57 | 0.85 | 158.53 ± 99.22 | 220.87 ± 173.07 | 0.002* |
| Lateral | 70.5 ± 80.00 | 73.36 ± 67.49 | 0.81 | 87.52 ± 66.82 | 137.05 ± 104.99 | < 0.001* |
| Septal | 80.99 ± 89.03 | 74.16 ± 87.59 | 0.68 | 99.123 ± 73.62 | 115.37 ± 84.83 | 0.18 |
| Floor | 105.1 ± 134.91 | 106.42 ± 148.67 | 0.96 | 117.62 ± 85.41 | 151.2 ± 110.07 | 0.052 |
| Posterior | 102.14 ± 157.47 | 159.03 ± 194.65 | 0.02* | 138.27 ± 112.3 | 234 ± 150.45 | < 0.001* |
*Denotes significance. Compares mean low voltage area between AF and SR for both dense scar (≤ 0.2 mV), and diseased LA tissue (0.21 - 0.5 mV). These values are compared across every anatomical segment. SD: standard deviation; SR: sinus rhythm; AF: atrial fibrillation; LA: left atrial.