Safety of intravenous thrombolysis in cerebral microbleeds patients with prior antiplatelet therapy / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To evaluate the safety of intravenous thrombolysis (IVT) in cerebral microbleeds (CMBs) patients with prior antiplatelet therapy.</p><p><b>METHODS</b>Four hundred and forty nine patients with acute ischemic stroke aged (66.8 ± 12.9) years, including 298 males and 151 females, underwent susceptibility-weighted imaging (SWI) examination and MRI-guided IVT therapy between June 2009 and June 2015. The presence of CMBs, previous antiplatelet therapy, HT subtypes according to ECASS II criteria and functional outcome based on modified Rankin scale (mRS) at 3 months were analyzed in logistic regression model.</p><p><b>RESULTS</b>Total 934 CMBs were detected in 172 (38.3%) patients, among whom 63 (14.0%) previously received antiplatelet therapy. All patients received intravenous recombinant tissue-plasminogen activator (rt-PA) for thrombolysis with the onset-to needle time of (229.0 ± 103.7) min. The pretreatment National Institutes of Health Stroke Scale (NIHSS) score was 10 (IQR 5-15). Logistic regression analysis indicated that prior antiplatelet use increased neither risk of parenchymal hematoma (PH) (OR=0.809,95% CI:0.201-3.262, P=0.766) nor adverse functional outcome (OR=1.517, 95% CI:0.504-4.568, P=0.459) in patients with CMBs; while in patients with multiple CMBs (≥ 3) prior antiplatelet use increased risk of hemorrhagic transformation (OR=9.737, 95% CI: 1.364-69.494, P=0.023), but not adverse functional outcome (OR=1.697, 95% CI:0.275-10.487, P=0.569).</p><p><b>CONCLUSION</b>The study indicates that in patients with CMBs, thrombolytic therapy should not be excluded due to the prior use of antiplatelet; however, the larger prospective studies are needed in future for patients with multiple CMBs.</p>

Older age is not related to hemorrhagic transformation and favorable outcomes in patients with wake-up ischemic stroke undergoing intravenous thrombolytic therapy / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate factors related to hemorrhagic transformation and favorable outcomes in wake-up ischemic stroke (WUIS) patients undergoing intravenous thrombolytic therapy.</p><p><b>METHODS</b>Clinical data of 600 patients undergoing multimodal image-guided intravenous recombinant tissue plasminogen activator (rt-PA) therapy in Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine center from May 2009 to May 2015 were retrospectively analyzed. Among 600 patients, 68 were diagnosed as WUIS including 17 cases aged 80 or older. Hemorrhagic transformation within the first 24 h after thrombolysis was assessed according to ECASS II criteria. Favorable outcome was defined as three-month modified Rankin Scale (mRS) 0-3. Univariate and binary logistic regression were used to analyze the risk factors of hemorrhagic transformation and poor clinical outcomes in WUIS patients.</p><p><b>RESULTS</b>Univariate analysis showed that WUIS patients aged ≥ 80 years had a lower rate in males (41.2% vs 76.5%, P=0.007), smokers (11.8% vs 43.1%, P=0.019) and favorable outcome (52.9% vs 78.4%, P=0.043); and a higher rate of cardiac embolism (64.7% vs 35.3%, P=0.034) compared with those aged <80 years. Binary logistic regression showed that age was not an independent risk factor for favorable outcome (OR=0.524, 95% CI:0.141-1.953, P=0.336) or hemorrhagic transformation (OR=1.039, 95% CI: 0.972-1.111, P=0.262).</p><p><b>CONCLUSION</b>Older age is not related to the favorable outcome or hemorrhagic transformation in WUIS patients undergoing multimodal image-guided intravenous thrombolytic therapy.</p>