Table 2 Heart rate variability data during mobilization before, 6 and 24 h after total hip arthroplasty
Preoperative | 6 h | 24 h | |||||||
|---|---|---|---|---|---|---|---|---|---|
Supine | Sitting | Standing | Supine | Sitting | Standing | Supine | Sitting | Standing | |
No of patients | 23 | 23 | 23 | 23 | 20 | 16 | 23 | 19 | 20 |
MeanNN (ms) | 863 (144) | 825 (136) | 771 (128)* | 756 (141)§ | 718 (133)* | 781 (177)*,§ | 734 (115)§ | 702 (106)* | 711 (157)*,§ |
SDNN (ms) | 22.1 (9.6) | 23.5 (8.8) | 20.2 (8.6) | 16.4 (7.4)§ | 17.1 (6.6) | 14.5 (3.2)§ | 13.5 (4.7)§ | 15.3 (5.5) | 13.6 (5.0)§ |
RMSSD (ms) | 20.4 (8.2) | 22.2 (8.5) | 18.9 (7.5) | 15.7 (6.5)§ | 18.3 (6.8) | 17.1 (3.6) | 12.7 (3.9)§ | 16.3 (6.2) | 14.5 (5.0) |
Total HRV power (ms2) | |||||||||
Geometric mean (95 % CI) | 373 (255–547) | 424 (289–621) | 277 (189–407)* | 187 (126–277)§ | 193 (128–290)§ | 133 (88–202)§ | 116 (80–166)§ | 135 (91–199)§ | 119 (81–175)§ |
Median (IQR) | 295 (150–895) | 432 (209–946) | 278 (149–636) | 151 (104–483) | 177 (87–495) | 167 (72–198) | 118 (61–274) | 144 (64–317) | 99 (55–235) |
LF variation (ms2) | |||||||||
Geometric mean (95 % CI) | 194 (125–303) | 220 (142–343) | 150 (97–234)* | 84 (51–137)§ | 78 (47–131)§ | 52 (31–89)*,§ | 62 (39–97)§ | 64 (40–103)§ | 53 (34–83)§ |
Median (IQR) | 157 (69–488) | 263 (93–605) | 165 (73–383) | 87 (31–300) | 67 (38–206) | 61 (26–108) | 65 (28–159) | 59 (29–120) | 38 (25–123) |
HF variation (ms2) | |||||||||
Geometric mean (95 % CI) | 112 (77–164) | 120 (82–175) | 75 (51–109)* | 60 (43–86)§ | 70 (48–101)§ | 52 (35–77) | 35 (26–48)§ | 54 (39–75)*,§ | 43 (31–60)§ |
Median (IQR) | 90 (57–255) | 111 (63–230) | 77 (33–164) | 63 (33–126) | 59 (37–139) | 60 (45–77) | 37 (21–49) | 52 (21–105) | 36 (22–86) |
Normalized HRV values | |||||||||
LF variation (nu) | 62.3 (14.8) | 62.9 (16.8) | 66.5 (13.1) | 57.4 (20.6) | 53.4 (20.6)§ | 48.4 (18.9)§ | 61.1 (18.8) | 53.8 (19.2)*,§ | 55.9 (17.1)*,§ |
HF variation (nu) | 37.7 (14.8) | 37.1 (16.8) | 33.5 (13.1) | 42.6 (20.6) | 46.6 (20.6)§ | 51.6 (18.9)§ | 38.9 (18.8) | 46.2 (19.2)*,§ | 44.1 (17.1)*,§ |
LF/HF ratio | |||||||||
Geometric mean (95 % CI) | 1.7 (1.3–2.4) | 1.8 (1.3–2.5) | 2.0 (1.5–2.8) | 1.4 (0.9–2.1) | 1.1 (0.7–1.7)§ | 1.0 (0.7–1.6)§ | 1.8 (1.2–2.6) | 1.2 (0.8–1.8)* | 1.2 (0.8–1.8)*,§ |
Median (IQR) | 1.7 (1.3–2.5) | 2.0 (1.1–3.0) | 2.1 (1.4–2.6) | 1.5 (0.9–2.6) | 1.1 (0.6–2.4) | 1.0 (0.7–1.6) | 1.7 (0.8–3.2) | 1.2 (0.5–2.0) | 1.1 (0.7–2.6) |