Follow up data on heart rate variability in the Maze group
| Daytime | Night time | ||||||
|---|---|---|---|---|---|---|---|
| 1 month | 6 months | 12 months | 1 month | 6 months | 12 months | ||
| SDRR (ms) | 8.4 (3.3) | 16.6 (5.2)2-150 | 32.1 (13.1)2-150 ‡ | 9.2 (3.8) | 22.0 (13.6)2-150 | 30.0 (18.3)2-150 | |
| (4.5 to 3.7) | (9.9 to 27.1) | (8.7 to 51.0) | (5.3 to 17.4) | (7.3 to 52.0) | (7.5 to 58.8) | ||
| TP (ms2/Hz) | 46.7 (16.0) | 95.7 (44.6)2-150 | 144.6 (68.8)2-150 | 51.8 (19.4) | 112.2 (59.2)2-150 | 181.5 (119.8)2-150 | |
| (34.0 to 62.8) | (52.2 to 200.8) | (48.4 to 255.0) | (33.9 to 71.3) | (58.5 to 217.9) | (69.5 to 382.9) | ||
| LF/HF | 0.31 (0.07) | 0.49 (0.26)† | 0.75 (0.32)† | 0.25 (0.07) | 0.37 (0.17)† | 0.59 (0.30)† | |
| (0.16 to 0.40) | (0.29 to 1.18) | (0.31 to 1.34) | (0.16 to 0.38) | (0.27 to 0.84) | (0.27 to 1.30) | ||
| HF (ms2/Hz) | 19.6 (9.9) | 38.2 (24.0)2-150 | 45.1 (30.0)2-150 | 24.6 (10.4) | 52.6 (33.7)2-150 | 74.9 (53.8)2-150 | |
| (9.4 to 27.3) | (18.1 to 41.2) | (18.0 to 93.0) | (10.3 to 38.9) | (16.8 to 111.3) | (21.3 to 142.1) | ||
All data are expressed as mean (SD) (range).
↵2-150 p<0.01 v 1 month, †p<0.05 v 1 month,‡p<0.05 v 6 months.
SDRR, mean of standard deviation of five minute successive normal RR intervals in two hours of data; TP, total spectral power components of heart rate variability in two hours of data; LF, low frequency components of heart rate variability in two hoursof data; HF, high frequency components of heart rate variability in two hours of data.