Table 3.
Results of Reduced Pre-Operative HRV Analysis in Patients with and without Postoperative AF During the Follow-Up
| Time Reduced Pre-Operative HRV |
Postoperative AF at 7 Days | p-value (CI 95%) | Postoperative AF at 3 Months | p-value (CI 95%) | Postoperative AF at 6 Months | p-value (CI 95%) | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| AF (+) (n =16) | AF (-) (n= 101) | AF (+) (n=16) | AF (-) (n=100) | AF (+) (n= 20) | AF (-)(n=96) | |||||
| ASDNN (n.%) | < 30 ms | 5 (22.70) | 17 (77.30) | > 0.05 (0.69–7.29) | 8 (38.10) | 13 (61.90) | <0.05* (2.14–20.92) | 7 (33.30) | 14 (66.70) | < 0.05* (1.0–9.28) |
| ≥ 30 ms | 11 (11.60) | 84 (88.40) | 8 (8.40) | 87 (91.60) | 13 (13.70) | 82 (86.30) | ||||
| rMSSD (n.%) | < 15 ms | 7 (41.20) | 10 (58.80) | <0.05* (2.16–23.12) | 5 (31.20) | 11 (68.80) | <0.05* (1.07–12.56) | 4 (25.00) | 12 (75.00) | >0.05 (0.50–6.11) |
| ≥ 15 ms | 9 (9.00) | 91 (91.00) | 11 (11.00) | 89 (89.00) | 16 (16.00) | 84 (84.00) | ||||
| pNN 50 (n.%) | < 0.75% | 7 (28.00) | 18 (72.00) | <0.05* (1.18–10.89) | 5 (20.80) | 19 (79.20) | > 0.05(0.60–6.23) | 6 (25.00) | 18 (75.00) | >0.05 (0.62–5.49) |
| ≥ 0.75% | 9 (9.80) | 83 (90.2) | 11 (12.00) | 81 (88.00) | 14 (15.20) | 78 (84.80) | ||||
| SDNN (n.%) | < 50 ms | 4 (44.40) | 5 (55.60) | <0.05* (1.50–27.15) | 6 (75.00) | 2 (25.00) | < 0.01* (5.22–16.4) | 4 (50.00) | 4 (50.00) | < 0.05* (1.30–25.36) |
| ≥ 50 ms | 12 (11.1) | 96 (88.9) | 10 (9.30) | 98 (90.70) | 16 (14.80) | 92 (85.20) | ||||
| SDNN (n.%) | ≥ 93 ms | 11 (20.8) | 42 (79.2) | <0.05* (1.0–9.56) | 10 (19.2) | 42 (80.8) | >0.05 (0.77–6.82) | 12 (23.1) | 40 (76.9) | >0.05 (0.78–5.60) |
| < 93 ms | 5 (7.8) | 59 (92.2) | 6 (9.4) | 58 (90.6) | 8 (12.5) | 56 (87.5) | ||||
| SDANN (n.%) | < 40 ms | 3 (60.00) | 2 (40.00) | <0.05* (1.74–74.88) | 2 (40.00) | 3 (60.00) | >0.05 (0.70–30.11) | 2 (40.00) | 3 (60.00) | >0.05 (0.53–2210) |
| ≥ 40 ms | 13 (11.60) | 99 (88.40) | 14 (12.60) | 97 (87.40) | 18 (16.20) | 93 (83.80) | ||||
Notes: *(The bold values): Statistically significant difference. Entries are numbers of patients. P -values are nominal. The cut-off for each index of reduced HRV time domain as recommended.
Abbreviation: CI, the confidence of interval.