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Table 2 Pre- to postoperative comparison of conduction times between onset of P- wave and appointed atrial regions and locations

From: Interatrial conduction disturbance in postoperative atrial fibrillation: a comparative study of P-wave dispersion and Doppler myocardial imaging in cardiac surgery

  onset P wave to onset A’wave onset P wave to peak A’wave* total electromechanical activity*
Right atrium basal -8 [-16;1] p = 0.092 -29 [-44;-14] p < 0.001 -31 [-47;-15] p < 0.001
mid -7 [-16;2] p = 0.105 -27 [-42;-11] p = 0.001 -46 [-64;-28] p < 0.001
Lateral left atrium basal -4 [-15;7] p = 0.517 -14 [-27;-2] p = 0.023 -16 [-27;-6] p = 0.001
mid -4 [-16;7] p = 0.092 -21 [-31;-11] p < 0.001 -22 [-33;-11] p < 0.001
Interatrial septum basal -7 [-16;2] p = 0.111 -17 [-29;-5] p = 0.008 -19 [-32;-7] p = 0.003
mid -7 [-15;1] p = 0.106 -13 [-27;1] p = 0.078 -27 [-44; -9] p = 0.003
Posterior left atrium basal -7 [-17;3] p = 0.177 -10 [-21;1] p = 0.067 -10 [-23;4] p = 0.159
  mid -2 [-12;8] p = 0.717 -13 [-25;0] p = 0.050 -12.5 [-24;-1] p = 0.039
  1. Negative differences indicate a faster postoperative atrial electromechanical cycle compared to its preoperative duration bold: significant values, *: heart rate adjusted. Bold writing indicates significant values.