In-stent stenosis of the internal carotid artery

Abstract

At present, the treatment of internal carotid artery stenosis has been extensively modified, passing from endarterectomy to balloon plasty and stent placement, generating a significant reduction in surgical risk [1]. In-stent stenosis is reported in up to 30% of cases and patients generally present with a transient ischemic attack or stroke [2]. Doppler ultrasound is an excellent tool for the evaluation of this pathology, accurately monitoring the percentage of in-stent stenosis and the hemodynamic repercussion it represents. In-stent stenosis of 50% correlates with velocities of up to 225 cm/s and greater than 70% correlates with velocities of up to 350 cm/s [3].