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. 2004 Apr 13;9(2):136–141. doi: 10.1111/j.1542-474X.2004.92532.x

Table 2.

Baseline and Postoperative P Wave Duration Measurements of Patients with Postoperative Paroxysmal AF

Variables Baseline After Surgery
1 Month 6 Months 1 Year
P maximum (ms) 121.1 ± 8  119.6 ± 9  118 ± 6 120.2 ± 7
P minimum (ms)    80 ± 13  78.8 ± 9   78 ± 9  79.7 ± 9
P dispersion (ms) 43.1 ± 9  41.5 ± 5 40.1 ± 5  40.4 ± 6
P1 value* 0.6 0.2  0.33
P2 value† 0.6 0.14 0.9 
P3 value‡ 0.5 0.14 0.28

*P1 = individual postoperative P maximum versus baseline P maximum; †P2 = individual postoperative P minimum versus baseline P minimum; ‡P3 = individual postoperative P dispersion versus baseline P dispersion.