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

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

		*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
Right atrium	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
Lateral left atrium	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
Interatrial septum	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

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.

ISSN: 1749-8090