Article Figures & Data
Figures
- Fig 1.
Postoperative changes in systolic (A), end-diastolic (B), and mean (C) STA flow velocity (FV), and diameter or STA (D). *P < .01, **P < .05, n.s. = not significant.
- Fig 2.
Postoperative changes in resting rCBF (left) and CVR (right). *P < .01, **P < .05.
- Fig 3.
Correlation between STDU parameters and SPECT parameters at 1 year after surgery. Mean STA flow velocity (mFV) and CVR (A), systolic STA flow velocity (sFV) and CVR (B), end-diastolic STA flow velocity (EDV) and CVR (C), and STA diameter and CVR (D).
- Fig 4.
Difference in diameter of STA (A), in systolic flow velocity (B), end-diastolic flow velocity (C), or mean flow velocity (D) between patients with low CVR (<10%; n = 8) and with high CVR (>10%; n = 37) at 1 year after surgery.
Tables
- Table 1:
Correlation between STDU parameters and CVR at different time point after surgery
Period after Surgery 14 Days 3 Months 1 Year STA mean FV r 2 = 0.02381 r 2 = 0.01619 r 2 = 0.08716 P = .3115 P = .4048 P = .0464 STA systolic FV r 2 = 0.02291 r 2 = 0.01162 r 2 = 0.06624 P = .3210 P = .4809 P = .0842 STA end-diastolic FV r 2 = 0.02077 r 2 = 0.02983 r 2 = 0.05528 P = .1441 P = .2566 P = .1157 STA diameter r 2 = 0.002902 r 2 = 0.1101 r 2 = 0.1232 P = .7284 P = .0278 P = .0181 Note:— CVR indicates cerebrovascular reserve capacity; FV, flow velocity; STA, superficial temporal artery; STDU, superficial temporal artery duplex ultrasonography.
- Table 2:
Predictive values for cerebrovascular reserve capacity higher than 10% at different cutoff values of diameter of STA at 1 year after ECIC bypass surgery
STA Diameter (mm) Sensitivity (%) Specificity (%) Positive Likelihood Ratio Positive Predictive Value Negative Predictive Value 0.8 100 12.5 1.14 84.1 100 1.0 100 12.5 1.14 84.1 100 1.2 97.3 25.0 1.30 85.7 66.7 1.4 89.2 37.5 1.43 86.8 42.9 1.6 78.4 62.5 2.09 90.6 38.5 1.8 75.7 87.5 6.06 96.6 43.8 2.0 56.8 87.5 4.54 95.5 30.4 2.2 50.0 100 100 28.6 2.4 29.7 100 100 23.5 2.6 18.9 100 100 21.1 2.8 8.1 100 100 19.5 Note:—ECIC indicates extracranial-intracranial bypass graft.
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