Table 1 Normal transcranial doppler velocities in the middle cerebral arteries obtained through the temporal window in awake children without cardiovascular disease, expressed as mean +/- SD. (From 31).
Age | Depth(mm) | Mean velocity (cm/s) | Peak systolic velocity (cm/s) | End-diastolic velocity (cm/s) |
|---|---|---|---|---|
0–3 mo | 25 | 24–42+/-10 | 46–75+/-15 | 12–24+/-8 |
3–12 mo | 30 | 74 +/- 14 | 114 +/- 20 | 46+/- 9 |
1–3 yr | 35–45 | 85 +/- 10 | 124 +/- 10 | 65 +/- 11 |
3–6 yr | 40–45 | 94 +/- 10 | 147 +/- 17 | 65 +/- 9 |
6–10 yr | 45–50 | 97 +/- 9 | 143 +/- 13 | 72 +/- 9 |
10–18 yr | 45–50 | 81 +/- 11 | 129 +/- 17 | 60 +/- 8 |