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Background: Intracranial arterial steno-occlusive lesion (IAS) is the most common cause of stroke. We hypothesized that adequate perioperative management for IAS is useful to prevent stroke in coronary artery bypass grafting (CABG). Methods: IAS was evaluated using magnetic resonance imaging/angiography (MRI/A, n = 216) in patients without a history of stroke or carotid stenosis (≥50%) in CABG between May 2005 and June 2018 (n = 424). Off-pump CABG was performed in most patients. Different perioperative managements of systolic arterial pressure (SAP) were applied for patients with and without MRI/A. SAP was strictly maintained at ≥80 mmHg in patients with significant IAS (≥50%, n = 28) and ≥90 mmHg for severe IAS (≥70%, n = 44) while SAP less than 80 mmHg (usually ≥70 mmHg) was allowed for patients without MRI/A. Intra-aortic balloon pumping was used for patients with multiple severe IAS and/or occlusion. Clinical outcomes were compared between patients with and without MRI/A. Propensity matching was performed (n = 181 each). Results: Complete revascularization was achieved in all patients. Nine patients (2.12%) had postoperative strokes; the incidence of stroke was signifi-cantly less in patients with preoperative MRI/A (n = 1, p = 0.016). There was no significant difference in the incidence of in-hospital mortality between patients with and without preoperative MRI/A (0.5% and 1.0%, respectively; p = 0.529). Multivariate analysis revealed that no preoperative MRI/A was the only significant predictors of postoperative stroke (p = 0.045). The incidence of stroke was not higher in patients with IAS who underwent MRI/A (p = 0.332). Conclusions: Preoperative evaluation of IAS using MRI/A and following our perioperative management significantly reduced perioperative stroke in patients undergoing CABG.

surgical science

Impact of Perioperative Management for Intracranial Arterial Stenosis on Postoperative Stroke Incidence in Coronary Artery Bypass Surgery: A Propensity Matching and Multivariate Analyses