Sheng Zhang1, Yangxiao Lai1, Xinfa Ding1, Mark Parsons1, John H Zhang1, Min Lou2. 1. From the Departments of Neurology (S.Z., Y.L., M.L.) and Radiology (X.D.), The Second Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China; Department of Neurology, John Hunter Hospital, The University of Newcastle, NSW, Australia (M.P.); and Department of Physiology and Pharmacology, Loma Linda University, CA (J.H.Z.). 2. From the Departments of Neurology (S.Z., Y.L., M.L.) and Radiology (X.D.), The Second Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China; Department of Neurology, John Hunter Hospital, The University of Newcastle, NSW, Australia (M.P.); and Department of Physiology and Pharmacology, Loma Linda University, CA (J.H.Z.). loumingxc@vip.sina.com.
Abstract
BACKGROUND AND PURPOSE: Our aim was to study the effect of drainage of cortical veins, including the superficial middle cerebral vein (SMCV), vein of Trolard, and vein of Labbé on neurological outcomes after reperfusion therapy. METHODS: Consecutive ischemic stroke patients who underwent pretreatment computed tomographic perfusion and 24-hour computed tomographic perfusion or magnetic resonance perfusion after intravenous thrombolysis were included. We defined "absent filling of ipsilateral cortical vein" (eg, SMCV-) as no contrast filling of the vein across the whole venous phase on 4-dimensional computed tomographic angiography in the ischemic hemisphere. RESULTS: Of 228 patients, SMCV-, vein of Trolard- and vein of Labbé- were observed in 50 (21.9%), 27 (11.8%), and 32 (14.0%) patients, respectively. Only SMCV- independently predicted poor outcome (3-month modified Rankin Scale score of >2; odds ratio, 2.710; P=0.040). No difference was found in reperfusion rate after treatment between patients with and without SMCV- (P>0.05). In patients achieving major reperfusion (≥80%), there was no difference in 24-hour infarct volume, or rate of poor outcome between patients with and without SMCV- (P>0.05). However, in those without major reperfusion, patients with SMCV- had larger 24-hour infarct volume (P=0.011), higher rate of poor outcome (P=0.012), and death (P=0.032) compared with those with SMCV filling. SMCV- was significantly associated with brain edema at 24 hours (P=0.037), which, in turn, was associated with poor 3-month outcome (P=0.002). CONCLUSIONS: Lack of SMCV filling contributed to poor outcome after thrombolysis, especially when reperfusion was not achieved. The main deleterious effect of poor venous filling appears related to the development of brain edema.
BACKGROUND AND PURPOSE: Our aim was to study the effect of drainage of cortical veins, including the superficial middle cerebral vein (SMCV), vein of Trolard, and vein of Labbé on neurological outcomes after reperfusion therapy. METHODS: Consecutive ischemic strokepatients who underwent pretreatment computed tomographic perfusion and 24-hour computed tomographic perfusion or magnetic resonance perfusion after intravenous thrombolysis were included. We defined "absent filling of ipsilateral cortical vein" (eg, SMCV-) as no contrast filling of the vein across the whole venous phase on 4-dimensional computed tomographic angiography in the ischemic hemisphere. RESULTS: Of 228 patients, SMCV-, vein of Trolard- and vein of Labbé- were observed in 50 (21.9%), 27 (11.8%), and 32 (14.0%) patients, respectively. Only SMCV- independently predicted poor outcome (3-month modified Rankin Scale score of >2; odds ratio, 2.710; P=0.040). No difference was found in reperfusion rate after treatment between patients with and without SMCV- (P>0.05). In patients achieving major reperfusion (≥80%), there was no difference in 24-hour infarct volume, or rate of poor outcome between patients with and without SMCV- (P>0.05). However, in those without major reperfusion, patients with SMCV- had larger 24-hour infarct volume (P=0.011), higher rate of poor outcome (P=0.012), and death (P=0.032) compared with those with SMCV filling. SMCV- was significantly associated with brain edema at 24 hours (P=0.037), which, in turn, was associated with poor 3-month outcome (P=0.002). CONCLUSIONS: Lack of SMCV filling contributed to poor outcome after thrombolysis, especially when reperfusion was not achieved. The main deleterious effect of poor venous filling appears related to the development of brain edema.
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