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Abstract
Objective: We have evaluated the factors of unsuccessful re-canalisation in a large series of patients with hemispheric cerebral infarction treated with thrombolysis. Patients and methods: All patients aged 18–80 years with an acute hemispheric infarction, admitted within the first few hours of symptoms onset, were immediately submitted to Magnetic Resonance both Imaging (MRI) and Angiography (MRA). MRI and MRA were repeated at 24 h of stroke. Re-canalisation was attributed if grade 2 or 3 of Thrombolysis in Myocardial Infarction (TIMI) criteria for the myocardial infarction. Outcome was rated at three months of stroke. Re-canalisation was matched with ageing and with the common risk factors for stroke. Results: One hundred and twenty-one patients, 70 men and 51 women, with a median age of 67 years, were included. Re-canalisation was seen in 62 patients (51%). Twenty-three patients (19%) died by 90 days of stroke. Re-canalisation was associated to survival (1 death vs. 22, p < 0.0001). Regression analysis retained advanced age (Odds ratio 0.37, 95% Confidence interval 0.13–0.98), baseline National Institute of Health Stroke Scale (NIHSS) (Odds ratio 0.94, 95% Confidence interval 0.89–0.98) and diabetes mellitus (Odds ratio 0.28, 95% Confidence interval 0.09–0.84) as factors contrasting re-canalisation. Conclusions: Our study indicates that in patients with proven occlusion of the terminal segment of the internal carotid artery and/or of the mainstem of the Middle Cerebral Artery, re-canalisation at 24 h of the acute ischemic stroke is dramatically associated with survival, and halted by advanced age and diabetes mellitus.