Background and Purpose—A favorable risk-benefit ratio for warfarin compared with aspirin
has been reported for the prevention of major vascular events in symptomatic≥ 50 …

Background and Purpose There is a clinical imperative for noninvasive tests for carotid
disease that have high sensitivity. Previous studies have shown that transcranial Doppler …

BACKGROUND AND PURPOSE: Duplex sonography is an effective tool for evaluating
internal carotid artery (ICA) stenosis, and power Doppler imaging has improved its value in …

Duplex ultrasound scan (DUS) criteria for grading> 50% carotid artery stenosis is typically
divided into broad categories such as 50–79% stenosis, 80–99% stenosis, and occlusion …

Transcranial color-coded duplex sonography (TCCS) enables the reliable assessment of
intracranial stenoses (sensitivity 94–100%, specificity 99–100%), occlusions (middle …

Background and Purpose—Intracranial arterial stenosis increases flow velocities on the
upslope of the Spencer's curve of cerebral hemodynamics. However, the velocity can …

Background and Purpose—Proper assessment of extracranial internal carotid artery high-
grade stenosis and occlusion by extracranial color-coded duplex sonography (ECCD) is …

Background and Purpose—Intracranial atherosclerotic disease is associated with a high risk
of stroke recurrence. We aimed to determine accuracy of transcranial Doppler screening at …

Background and Purpose Echo contrast agents have been shown to provide conclusive
examinations in most patients with insufficient ultrasound penetration through the temporal …

OBJECTIVE To evaluate duplex ultrasongraphic criteria for the determination of 50% or
more and 70% or more stenosis of the diameter of the internal carotid artery based on …