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- W2280864093 abstract "Background: Several methods exist that assess the intracranial collaterals on CT-angiography (CTA) of the brain. We compared existing methods for quantification of collaterals on day-2 CTA in thrombolyzed AIS patients to assess their predictive value for functional outcome. Methods: Consecutive AIS patients treated with intravenous tissue plasminogen activator (IV-tPA) during 2007-2012 were included. Data were collected for demographics, vascular risk factors, NIHSS scores and stroke subtypes. Intracranial collaterals were evaluated by 2 independent neuroradiologists using 4 existing methods- Miteff’s system (grades middle cerebral artery (MCA) collateral branches with respect to sylvian fissure); Maas system (compares collaterals in affected hemisphere against the contralateral side); Modified Tan’s scale (collaterals in 50% or more of MCA territory classified as good); and 20-point collateral grading scale by Alberta Stroke Program Early CT score (ASPECTS) methodology. Good functional outcome at 3-months was determined by modified Rankin scale (mRS) scores of 0-1. Results: Day-2 CTA was performed in 150 patients with anterior circulation AIS treated with IV-tPA. Median age 66yrs (range 33-92), 47% males, median NIHSS 19 points (range 4-34) and median onset-to-treatment time 165 minutes (range 74-274). Overall, 67 (44.6%) patients achieved good functional outcome at 3-months. On univariable analysis- younger age, lower pre-tPA NIHSS scores, atrial fibrillation, good collaterals according to ASPECTS scoring and good collaterals by Maas methodology were significantly associated with good functional outcome. On multivariable analysis, lower NIHSS (OR 1.155 per NIHSS point; 95% CI 1.066-1.251, p=0.001), younger age (OR 1.052 per year; 95% CI 1.012-1.094, p=0.010), good collaterals by Maas methodology (OR 2.805 95% CI 1.122 -7.011, p =0.002) and good collaterals (score of 9 or more) by ASPECTS methodology (OR 3.769 ; 95%CI: 1.327- 10.708, p= 0.013 ) were found as independent predictors of good outcome. Conclusion: Of the existing intracranial collaterals scoring systems, only the ASPECTS and Maas methods are reliable predictor of favourable outcome in thrombolyzed anterior circulation AIS patients." @default.
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- W2280864093 date "2014-02-01" @default.
- W2280864093 modified "2023-09-26" @default.
- W2280864093 title "Abstract W P35: Assessment of Collaterals on Day-2 CT Angiography Can Predict Functional Outcome in Thrombolyzed Anterior Circulation Acute Ischemic Stroke" @default.
- W2280864093 doi "https://doi.org/10.1161/str.45.suppl_1.wp35" @default.
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