Table 2:

Measured values of TCD and PCT parameters in the four categories of arterial territories defined according to DSA and TCD findings

TerritoriesnTCD Absolute FV (cm/s)TCD EICA RatiosPCT rCBV (cc × 100 g−1)PCT rCBF (cc × 100 g−1 × min−1)PCT MTT (s)PCT TTP (s)
DSA-negative and TCD-negative40277.4 (42.0–113.8)1.4 (0.8–2.0)4.3 (2.2–6.1)49.2 (42.6–56.9)5.3 (2.8–7.2)21.8 (16.7–26.8)
}*}*
TCD-positive but DSA-negative105122.9 (54.6–181.7)2.4 (1.1–3.6)4.3 (2.7–5.8)49.0 (42.3–56.5)5.2 (3.3–6.9)22.1 (17.1–28.0)
}*}*}*
DSA-positive without endovascular treatment63117.1 (36.2–206.7)2.0 (1.2–3.6)4.5 (3.2–7.3)41.5 (27.7–47.7)7.4 (5.9–9.4)26.2 (22.6–29.8)
DSA-positive with endovascular treatment60152.6 (62.3–243.2)3.1 (1.0–5.2)4.1 (1.3–6.2)37.2 (17.5–42.8)7.8 (5.9–10.2)27.5 (23.0–31.1)
Kruskal-WallisP < 0.001P < 0.001P = 0.960P < 0.001P < 0.001P < 0.001
  • Note:— FV indicates flow velocity; EICA, extracranial to intracranial; rCBV, relative cerebral blood volume; rCBF, relative cerebral blood flow; MTT, mean transit time; TTP, time-to-peak; }*, Wilcoxon test, P < 0.001.