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Updated: Jul 19, 2026
06:01
A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
A predictive risk model for outcomes of ischemic stroke
K C Johnston1, A F Connors, D P Wagner
1Departments of Neurology, University of Virginia, Charlottesville, VA 22908, USA. kj4v@virginia.edu
Stroke
|February 5, 2000
Summary
Predicting stroke outcomes is crucial. Combining clinical data with infarct volume significantly improves prediction accuracy for 3-month recovery and disability in ischemic stroke patients.
Area of Science:
- Neurology
- Stroke Medicine
- Clinical Prediction Models
Background:
- Stroke outcome variability necessitates identifying reliable predictors.
- Multivariable models combining clinical and imaging data may offer superior predictive power.
Purpose of the Study:
- To determine the multivariable relationship between infarct volume, clinical variables, and 3-month outcomes in ischemic stroke.
- To assess the predictive performance of combined clinical and imaging data.
Main Methods:
- Analysis of 256 ischemic stroke patients from the RANTTAS trial.
- Used six clinical variables and 1-week infarct volume as predictors.
- Applied multivariable logistic regression and bootstrap validation; assessed discrimination with ROC curves and calibration.
Main Results:
- Predictive models achieved areas under the ROC curve from 0.79 to 0.88 with excellent calibration.
- Combined clinical and imaging data significantly improved prediction (P<0.001) compared to using either alone for excellent recovery and severe disability/death.
Conclusions:
- Combined clinical and imaging variables effectively predict 3-month outcomes in ischemic stroke.
- This supports using acute clinical data and infarct volume for future outcome prediction models.
Related Concept Videos
01:15Ischemic Stroke l: Introduction
Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
01:15Ischemic Stroke ll: Pathophysiology
An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...