Aim: To study the effects of pretreatment with Antiplatelet (AP) before IV thrombolysis (IVT) on the rate of symptomatic intracranial hemorrhage (sICH) and functional outcome in patients with Acute Ischemic stroke (AIS).
Method: In this retrospective study, the medical records and cerebrovascular images of all the patients who received IVT for AIS in our center in a 9.6-year period were reviewed. Patients who took at least one dose of any APs in the last 24 h prior to IVT were identified. They were categorized according to the type of AP, single versus dual AP therapy (DAPT), and dose of AP. Rate of sICH and functional outcome at discharge were compared between the AP users and non-users.
Results: A total of 834 patients received IVT for AIS in our center during a 9.6- year period. Multivariate models were adjusted for age, NIHSS on admission, history of atrial fibrillation, history of hypertension, INR on admission, history of stroke and diabetes mellitus. In multivariate regression analyses and after adjusting for the variables mentioned above, the use of any AP was not associated with an increased rate of sICH (OR = 1.28 [0.70-2.34], p = 0.425). Furthermore, the use of DAPT did not significantly increase the rate of sICH in multivariate regression analyses. (OR = 0.663 [0.15-2.84], p = 0.580). The patients on any AP had a lower chance of having good functional outcome in univariate analysis (OR = 0.735 [0.552-0.979], p = 0.035). However, when adjusted for age, baseline NIHSS, history of diabetes, hypertension and prior stroke, AP use was not associated with a decreased chance of having a good functional outcome at discharge. (OR = 0.967 [0.690-1.357], p = 0.848). In addition, no significant difference was noted in the rate of good functional outcome between patients on DAPT and no AP users in multivariate regression analyses. (OR = 1.174 [0.612-2.253], p = 0.629).
Conclusion: Our study did not show any significant association between the risk of sICH and good functional outcome after IVT for AIS patients on AP therapy (dual or single) in comparison with AP naïve patients.
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