1. Severe carotid stenosis and delay of reperfusion in endovascular stroke treatment: an Interventional Management of Stroke-III study.
- Author
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Gogela SL, Gozal YM, Zhang B, Tomsick TA, Ringer AJ, Broderick JP, Khatri P, and Abruzzo TA
- Subjects
- Age Factors, Aged, Carotid Stenosis therapy, Cerebral Angiography, Cerebral Hemorrhage complications, Cerebral Hemorrhage diagnostic imaging, Cerebral Hemorrhage therapy, Female, Humans, Male, Middle Aged, Retrospective Studies, Severity of Illness Index, Stroke diagnostic imaging, Time Factors, Treatment Outcome, Carotid Stenosis complications, Carotid Stenosis diagnostic imaging, Cerebrovascular Circulation, Endovascular Procedures, Stroke complications, Stroke therapy
- Abstract
OBJECTIVE The impact of extracranial carotid stenosis on interventional revascularization of acute anterior circulation stroke is unknown. The authors examined the effects of high-grade carotid stenosis on the results of endovascular treatment of patients in the Interventional Management of Stroke (IMS)-III trial. METHODS The 278 patients in the endovascular arm of the IMS-III trial were categorized according to the degree of carotid stenosis as determined by angiography. In comparing patients with severe stenosis or occlusion (≥ 70%) to those without severe stenosis (< 70%), the authors evaluated the time to endovascular reperfusion, modified Thrombolysis in Cerebrovascular Infarction (mTICI) scores, 24-hour mean infarct volumes, symptomatic intracerebral hemorrhage rates, and modified Rankin Scale (mRS) scores at 90 days. RESULTS Compared with the 249 patients with less than 70% stenosis, patients with severe stenosis (n = 29) were found to have a significantly longer mean time to reperfusion (105.7 vs 77.7 minutes, p = 0.004); differences in mTICI scores, infarct volumes, hemorrhage rates, and mRS scores at 90 days did not reach statistical significance. Multiple regression analysis revealed that severe carotid stenosis (p < 0.0001) and higher baseline National Institutes of Health Stroke Scale (NIHSS) scores (p = 0.004) were associated with an increase in time to reperfusion. Older age (p < 0.0001), higher NIHSS score (p < 0.0001), and the absence of reperfusion (p = 0.001) were associated with worse clinical outcomes. CONCLUSIONS Severe ipsilateral ICA stenosis was associated with a significantly longer time to reperfusion in the IMS-III trial. Although these findings may not translate directly to modern devices, this 28-minute delay in reperfusion has significant implications, raising concern over the treatment of tandem ICA stenosis and downstream large-vessel occlusion.
- Published
- 2018
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