Intracranial Thrombus Extent Predicts Clinical Outcome, Final Infarct Size and Hemorrhagic Transformation in Ischemic Stroke: The Clot Burden Score
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- 1 November 2008
- journal article
- research article
- Published by SAGE Publications in International Journal of Stroke
- Vol. 3 (4), 230-236
- https://doi.org/10.1111/j.1747-4949.2008.00221.x
Abstract
In ischemic stroke, functional outcomes vary depending on site of intracranial occlusion. We tested the prognostic value of a semiquantitative computed tomography angiography-based clot burden score. Clot burden score allots major anterior circulation arteries 10 points for presence of contrast opacification on computed tomography angiography. Two points each are subtracted for thrombus preventing contrast opacification in the proximal M1, distal M1 or supraclinoid internal carotid artery and one point each for M2 branches, A1 and infraclinoid internal carotid artery. We retrospectively studied patients with disabling neurological deficits (National Institute of Health Stroke Scale score ≥ 5) and computed tomography angiography within 24-hours from symptom onset. We analyzed percentages independent functional outcome (modified Rankin Scale score ≤ 2), final infarct Alberta Stroke Program Early Computed Tomography Score and parenchymal hematoma rates across categorized clot burden score groups and performed multivariable analysis. We identified 263 patients (median age 73-years, National Institute of Health Stroke Scale score 10, onset-to-computed tomography angiography time 165 min). Clot burden score < 10 was associated with reduced odds of independent functional outcome (odds ratio 0.09 for clot burden score ≤5; odds ratio 0.22 for clot burden score 6–7; odds ratio 0.48 for clot burden score 8–9; all versus clot burden score 10; P P P = 0.008). Inter-rater reliability for clot burden score was 0.87 (lower 95% confidence interval 0.71) and intra-rater reliability 0.96 (lower 95% confidence interval 0.92). The quantification of intracranial thrombus extent with the clot burden score predicts functional outcome, final infarct size and parenchymal hematoma risk acutely. The score needs external validation and could be useful for patient stratification in stroke trials.Keywords
This publication has 28 references indexed in Scilit:
- Methodology of the Interventional Management of Stroke III TrialInternational Journal of Stroke, 2008
- Intravenous or Intra-Arterial Thrombolysis?Stroke, 2007
- Recanalization after intravenous thrombolysisNeurology, 2007
- Site of Arterial Occlusion Identified by Transcranial Doppler Predicts the Response to Intravenous Thrombolysis for StrokeStroke, 2007
- The Impact of Recanalization on Ischemic Stroke OutcomeStroke, 2007
- Early Recanalization After Intravenous Administration of Recombinant Tissue Plasminogen Activator as Assessed by Pre- and Post-Thrombolytic Angiography in Acute Ischemic Stroke PatientsStroke, 2007
- Extent of Early Ischemic Changes on Computed Tomography (CT) Before ThrombolysisStroke, 2006
- Improving the Predictive Accuracy of Recanalization on Stroke Outcome in Patients Treated With Tissue Plasminogen ActivatorStroke, 2004
- Does Arterial Recanalization Improve Outcome in Carotid Territory Stroke?Stroke, 1995
- Classification of subtype of acute ischemic stroke. Definitions for use in a multicenter clinical trial. TOAST. Trial of Org 10172 in Acute Stroke Treatment.Stroke, 1993