• Claudio Baracchini, Filippo Farina, Alessio Pieroni, Anna Palmieri, Caterina Kulyk, Federica Viaro, Joseph-Domenico Gabrieli, Giacomo Cester, Francesco Causin, and Renzo Manara.
• Stroke Unit and Neurosonology Laboratory, Department of Neuroscience, University of Padua School of Medicine, Padua, Italy. Electronic address: claudiobaracchini@gmail.com.
• World Neurosurg. 2019 May 1; 125: e849-e855.

BackgroundIntracranial hemorrhage (ICH) is the most feared complication of endovascular treatment (EVT) for acute ischemic stroke because of anterior circulation large vessel occlusion (LVO). The purpose of this study was to identify cerebral hemodynamic predictors of ICH and poor outcome in patients with successful recanalization.MethodsSerial transcranial color-coded sonography (TCCS) examinations assessed vessel status and cerebral hemodynamics of 226 (mean age, 69.8 ± 12.5 years; 130 men [57.5%]) consecutive patients with acute anterior circulation LVO at 48 hours and 1 week after EVT. Middle cerebral artery peak systolic velocity (PSVMCA) and PSVMCA ratio (recanalized PSVMCA/contralateral PSVMCA) were recorded.ResultsOut of 180 successfully recanalized patients (79.6%), 28 patients (15.5%) had ICH. They more often had arterial hypertension (25/28 [89.3%] vs. 106/152 [69.7%], P = 0.04), a more severe stroke syndrome (18 [range, 10-23] vs. 16 [range, 5-26], P = 0.01), a worse clinical outcome (90-day modified Rankin Scale [mRS] score 3-5: 16/28 [57.1%] vs. 42/152 [27.6%], P = 0.004), and soon after EVT showed a significantly higher mean PSVMCA ratio (3.4 ± 0.1 vs. 2.4 ± 0.1, P < 0.0001) than patients without ICH, respectively. In multivariate analysis, early PSVMCA ratio was independently associated with postinterventional ICH (odds ratio, 13.379; 95% confidence interval, 2.466-50.372; P < 0.01). The patients with ICH (19/28 [67.9%]) who resumed normal PSVMCA values at 1 week after EVT had a better outcome (90-day mRS score 0-2: 8/19 [42.1%] vs. 0/9 [0%], respectively).ConclusionsEarly TCCS detection of a high PSVMCA ratio in successfully recanalized stroke patients indicates an increased risk of ICH, whereas cerebral hemodynamics normalization at 1 week in patients with postinterventional ICH predicts a relatively better 3-month outcome.Copyright © 2019 Elsevier Inc. All rights reserved.

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