Indices of heart rate variability in the groups studied
| TCPC | APC | PCPC | Biventricular repair | Healthy controls | |
|---|---|---|---|---|---|
| RR (ms) | 698 (99) | 752 (64) | 700 (100) | 790 (155) | 845 (134) |
| SD (ms) | 94 (31)3-150 | 121 (31)3-151 | 121 (44)3-151 | 153 (60) | 170 (43) |
| r-MSSD (ms) | 22.6 (9.7)3-150 | 29 (22)3-150 | 34.5 (15)3-151 | 69 (45) | 75 (36) |
| pNN50 (%) | 3.6 (4.8)3-150 | 6 (9)3-150 | 8.8 (5.7)3-151 | 25 (13) | 32 (13) |
| TP (ms2) | 760 (980)3-150 | 972 (718)3-151 | 1925 (1590)3-151 | 3062 (2400) | 6550 (5000) |
| LF (ms2) | 159 (210)3-150 | 176 (156)3-150 | 531 (550)3-151 | 775 (548) | 1862 (1418) |
| HF (ms2) | 65 (117)3-150 | 98 (120)3-150 | 244 (240)3-151 | 659 (637) | 1443 (2039) |
| LF/HF | 3.1 (2.25) | 3.0 (2.0) | 2.8 (2.6) | 1.75 (0.9) | 2.0 (0.8) |
Values are mean (SD).
āµ3-150 p < 0.0001 v biventricular repair and healthy controls;
āµ3-151 pā<ā0.0001 v healthy controls.
APC, atrial cavopulmonary connection; HF, high frequency (ms2); LF, low frequency (ms2); LF/HF, LF to HF ratio; PCPC, partial cavopulmonary connection; pNN50, per cent of differences of successive RR intervals > 50 ms; r-MSSD, square root of the mean squared differences of successive RR intervals (ms); RR, mean duration of RR intervals (ms); SD, standard deviation of all RR intervals (ms); TCPC, total cavopulmonary connection; TP, total power (ms2).