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ABSTRACT
BACKGROUND AND PURPOSECurrent criteria for middle cerebral artery (MCA) stenosis by transcranial Doppler were mainly based on the flow velocity acceleration, ignoring other useful parameters. We tested the accuracy of new criteria using magnetic resonance angiography (MRA) as the confirmative method.
METHODSA compositive score for each MCA was calculated according to following parameters: Velocity Scale (score 0‐6 for peak systolic velocity <140 to ≥300 cm/second), Hemodynamic Scale (score 0‐5 for diffuse or focal velocity increase; score 0‐6 for differences between bilateral MCA; score 17 for damping velocity), and Spectrum Scale (score 0‐2 for normal spectrum, turbulence, and musical murmurs)....
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