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Table 3 Frequency-domain parameters of HRV

From: Atrial fibrillation and alteration of heart rate variability after video-assisted pulmonary lobectomy versus thoracotomy pulmonary lobectomy

  VATS THOR P value
LnLF (ms2)
Pre-op 2 h 4.7 ± 1.2 4.8 ± 1.3 0.91
Pre-op 4 h 6.1 ± 1.5 5.7 ± 1.4 0.73
Post-op12h 5.9 ± 1.9 5.2 ± 1.5 0.59
Post-op24h 5.4 ± 1.9 4.9 ± 1.3 0.33
LnHF (ms2)
Pre-op 2 h 4.2 ± 1.6 4.1 ± 1.5 0.88
Pre-op 4 h 5.8 ± 2.9 5.6 ± 1.9 0.79
Post-op12h 5.8 ± 2.1 5.3 ± 1.7 0.69
Post-op24h 4.8 ± 1.6 5.5 ± 1.8 0.61
LF/HF ratio
Pre-op 2 h 1.6 ± 0.7 1.3 ± 1.7 0.39
Pre-op 4 h 2.0 ± 1.2 2.2 ± 3.1 0.67
Post-op12h 3.6 ± 2.0 3.0 ± 7.5 0.36
Post-op24h 2.4 ± 0.7 2.0 ± 2.8 0.64