HAT score to predict hemorrhage after alteplase

The Hat Score A simple grading sclae for predicting hemorrhage after thrombolysis


Lou M et al. Risk stratification measure to predict hemorrhage after alteplase given for stroke. Collective rate of symptomatic ICH is two percent (0 points); 5 % (1 point), 10 % (2 points), 15 % (3 points), 44 % (>3 points).

diabetes-- 1 point for history of DM or entry glc > 200
pretreatment NIHSS score-- 1 point if 15-20, 2 points if > 20
presence of easily visible hypodensity on initial head CT-- 1 point if yes but <> 1/3 of MCA territory