Criteria for Identifying Proximal Vertebral Artery Stenosis of 50% or More

Vascular Laboratory and Imaging


Doppler Criteria for Identifying Proximal Vertebral Artery Stenosis of 50% or More


Yurdakul M, Tola M (Turkiye Yüksek Ihtisas Hosp, Ankara, Turkey) J Ultrasound Med 30:163–168, 2011§



G.L. Moneta, MD



Evidence Ranking


• C



Expert Rating


• 1



Abstract



Objectives


The proximal segment of the vertebral artery is a frequent site of obstructive atherosclerosis. The purpose of this study was to determine Doppler criteria for identifying proximal vertebral artery stenosis of 50% or more by comparison with digital subtraction angiography.



Methods


Forty-eight patients with vertebral artery stenosis were examined prospectively with color Doppler sonography and digital subtraction angiography. The peak systolic velocity (PSV), end-diastolic velocity (EDV), peak systolic velocity ratio (PSVr), and end-diastolic velocity ratio (EDVr) were evaluated by receiver operating characteristic curve analysis for their ability to detect vertebral artery stenosis of 50% or more. The optimal criteria for identifying proximal vertebral artery stenosis of 50% or more were determined.



Results


For identifying vertebral artery stenosis, the parameter with the highest accuracy was the PSVr (area under the receiver operating characteristic curve, 0.967 [95% confidence interval, 0.899–0.994]). A PSVr of greater than 2.2 was found to be the optimal criterion for identifying proximal vertebral artery stenosis of 50% or more, with sensitivity and specificity of 96% and 89%, respectively. The optimal thresholds for the other Doppler parameters in identifying proximal vertebral artery stenosis of 50% or more were as follows: PSV, greater than 108 cm/s; EDV, greater than 36 cm/s; and EDVr, greater than 1.7.

Related posts:

  1. duplex ultrasound predicts early graft thrombosis after crural bypass in patients with critical limb ischemia
  2. Hemorrhage Is Much More Common After Carotid Stenting Than After Endarterectomy: Evidence From the National Inpatient Sample
  3. oral antiplatelet therapy may increase the risk of hemorrhagic complications in patients with acute ischemic stroke caused by large artery disease
  4. and Removal of Inferior Vena Cava Filters: National Trends in the Medicare Population

Stay updated, free articles. Join our Telegram channel
Tags:
Apr 1, 2017 | Posted by in CARDIOLOGY | Comments Off on Criteria for Identifying Proximal Vertebral Artery Stenosis of 50% or More

Full access? Get Clinical Tree
Get Clinical Tree app for offline access