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Angiographic Patterns and Outcomes Achieved by Proximal Balloon Occlusion in Symptomatic Carotid Artery Stenosis Stenting.
Clinical Neuroradiology 2020 June
BACKGROUND AND PURPOSE: The best embolic protection strategy has not yet been established for carotid artery stenting (CAS). This article reports a new simplified approach using a balloon guide catheter inspired by stroke therapy, in patients harboring a symptomatic ICA atherosclerotic stenosis or web. In addition, the three angiographic patterns and clinical outcomes associated with this technique, called the simple flow blockage (SFB) technique are described.
MATERIAL AND METHODS: This was a retrospective study with data extraction from a monocentric prospective clinical registry of consecutive patients admitted for symptomatic ICA stenosis or web. The primary study outcome (composite endpoint) was the rate of occurrence of death, symptomatic stroke or acute coronary syndrome within 30 days of the intervention.
RESULTS: In this study 75 symptomatic patients with >50% carotid artery atherosclerotic stenosis or web were included. All procedures were successfully performed. The composite endpoint occurred in 3 patients (4.0%, 95% confidence interval, CI, 0.0-11.3): 1 had symptomatic ischemic stroke, 1 had reperfusion syndrome with symptomatic intracranial hemorrhage and 1 had acute coronary syndrome. After proximal balloon inflation three angiographic patterns were observed: complete contrast column stagnation in the ICA (38.7%), retrograde washout of the ICA from the intracranial circulation towards the external carotid artery (35.5%) and antegrade washout of contrast medium towards the intracranial circulation (25.8%). The median procedure length was 40 min. New asymptomatic ischemic lesions were observed in 22.5% on DWI-MRI.
CONCLUSION: The SFB technique enables fast and safe procedures in CAS. A favorable angiographic pattern after proximal balloon inflation was observed in 74.2% of cases.
MATERIAL AND METHODS: This was a retrospective study with data extraction from a monocentric prospective clinical registry of consecutive patients admitted for symptomatic ICA stenosis or web. The primary study outcome (composite endpoint) was the rate of occurrence of death, symptomatic stroke or acute coronary syndrome within 30 days of the intervention.
RESULTS: In this study 75 symptomatic patients with >50% carotid artery atherosclerotic stenosis or web were included. All procedures were successfully performed. The composite endpoint occurred in 3 patients (4.0%, 95% confidence interval, CI, 0.0-11.3): 1 had symptomatic ischemic stroke, 1 had reperfusion syndrome with symptomatic intracranial hemorrhage and 1 had acute coronary syndrome. After proximal balloon inflation three angiographic patterns were observed: complete contrast column stagnation in the ICA (38.7%), retrograde washout of the ICA from the intracranial circulation towards the external carotid artery (35.5%) and antegrade washout of contrast medium towards the intracranial circulation (25.8%). The median procedure length was 40 min. New asymptomatic ischemic lesions were observed in 22.5% on DWI-MRI.
CONCLUSION: The SFB technique enables fast and safe procedures in CAS. A favorable angiographic pattern after proximal balloon inflation was observed in 74.2% of cases.
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