Table 2 Mean and Percentiles of ECG Cardiac Measures Among Pre-pubertal Children
From: Baseline values from the electrocardiograms of children and adolescents with ADHD
ECG Variable | Mean (sd) | 1st %ile | 5th %ile | Median | 95th %ile | 99th %ile |
|---|---|---|---|---|---|---|
Heart Rate (bpm) | 83.0 (12.1) | 59.0 | 65.0 | 82.0 | 104 | 114.0 |
RR Interval (ms) | 738.5 (107.8) | 526.3 | 576.9 | 731.7 | 923.1 | 1040.0 |
PR Interval (ms) | 132.8 (17.3) | 100.0 | 108.0 | 130.0 | 162.0 | 180.0 |
QRS Interval (ms) | 80.0 (9.0) | 64.0 | 70.0 | 80.0 | 96.0 | 102.0 |
QT Interval (ms) | 354.7 (24.3) | 300.0 | 318.0 | 352.0 | 396.0 | 416.0 |
QTc Bazett (ms) | 414.0 (19.6) | 367.0 | 383.0 | 414.0 | 443.0 | 460.0 |
QTc Data-derived (ms) | 399 (17.3) | 357.4 | 372.0 | 398.7 | 424.1 | 439.6 |
QTc Fridericia (ms) | 393.2 (17.1) | 353.3 | 366.3 | 392.9 | 419.0 | 433.0 |