HAT Score (Post-tPA Hemorrhage)
Four admission features (each +1), total 0–4; interpret symptomatic intracerebral hemorrhage risk.
Calculator
How it works
The HAT score stratifies risk of symptomatic intracerebral hemorrhage after IV alteplase for acute ischemic stroke using four simple admission variables.
Limits
Does not replace imaging, blood pressure management, or guideline inclusion/exclusion criteria for thrombolysis.
Educational tool only—not for diagnosis or treatment decisions.