Clinical Study
Heart Rate Variability in Children with Tricyclic Antidepressant Intoxication
Table 2
Twenty-four-hour time-domain (non-spectral) and 5-minute spectral analysis results by study group.
| | | TCA intoxication
() | Control
() | |
| | Mean heart rate (per minute) | 148
(66–224) | 78
(55–102) | <0.05 | | SDNN (ms) | 104
(94–117) | 146
(134–170) | 0.000 | | SDANN (ms) | 27
(25–44) | 31
(26–39) | | | RMSDD (ms) | 46
(41–64) | 65
(57–102) | 0.049 | | SDNN index | 60
(51–70) | 81
(72–96) | 0.002 | | pNN50 (%) | 11.3
(8.9–20.9) | 24.6
(20.8–33.4) | 0.005 |
| | | Frequency-domain (spectral) analysis | |
| | VLF (ms2) | 772
(271–3873) | 806
(698–1046) | | | nLF (nu) | 27
(24–35) | 17
(11–24) | 0.012 | | nHF (nu) | 6.9
(5.4–8.7) | 12.1
(10.7–22) | 0.001 | | LF/HF | 4.6
(1.1–14.4) | 0.96
(0.8–2) | 0.001 |
|
|
Values are given as median (95% CI).
|
