Assessment of Hemodynamics of Intracranial Abnormal Vessels by Transcranial Doppler Sonography

Abstract

Hemodynamics of Intracranial vessels were evaluated by Transcranial Doppler Sonography (TCD) . In 30 healthy subjects and 12 patients (AVM 4, Moyamoya disease 3, cerebral tumor 3, giant aneurysm 2) . Blood flow velocity and S/D ratio were measured. CO₂reactivity during hyperventilation was also studied.
TCD obtained abnormal velocity waveform in 8 out of 12 cases with Intracranial abnormal vessels. As to screening test method of intracranial abnormal vessels, TCD has some problems such as angle between ultrasonic beam and vessel, narrow acuostic window and sampling volume. But TCD is feasible for evaluation of cerebrovascular reactivity.