作者: M. Eliasziw , R.N. Rankin , A.J. Fox , R.B. Haynes , H.J.M. Barnett
DOI: 10.1161/01.STR.26.10.1747
关键词: Stenosis 、 Radiology 、 Carotid endarterectomy 、 Stroke 、 Verification bias 、 Cerebral angiography 、 Angiography 、 Receiver operating characteristic 、 Medicine 、 Endarterectomy
摘要: Background and Purpose The accuracy of routine ultrasonography in detecting severe carotid artery stenosis was evaluated comparison with cerebral angiography. precision ultrasonographic criteria predicting the risk stroke also assessed. Methods A total 1011 symptomatic bifurcations were studied patients from North American Symptomatic Carotid Endarterectomy Trial (NASCET). Given that all considered for entry into trial, chance a verification bias affecting analyses minimized. data consisted peak systolic velocities frequency changes both internal common arteries. Angiographic calculated as NASCET. Receiver operating characteristic (ROC) curves constructed detection 70% or greater on basis an angiographic assessment. Kaplan-Meier stroke-free survival used to predict stroke. Results a...