OBJECTIVE : The aim of this study was to identify whether diastolic dysfunction predicts death at 90 days after acute ischemic stroke. METHODS : We retrospectively analyzed patients with ischemic stroke. All patients underwent transthoracic echocardiography to evaluate systolic function and diastolic function by means of assessing ejection fraction and septal E/e'. We evaluated the initial National Institute of Health Stroke Scale (NIHSS) score, arterial occlusion, and laboratory data. We used multivariate regression models to identify independent predictors of 90-day mortality. RESULTS : Among 1208 patients, the overall 90-day mortality rate was 8%. In multivariate logistic regression analysis, a higher initial NIHSS score, plasma D-dimer level and E/e', and occlusion of internal carotid artery or basilar artery were independent predictors of 90-day mortality. The DONE score derived from these valuables showed good discrimination with area under the curve (AUC) value of 0.82 (95% confidence interval [CI], 0.78-0.87) to predict 90-day mortality. The DONE score also predicted poor outcome (modified Rankin scale score, 4-6) at 90 days (AUC, 0.82; 95% CI 0.80-0.85). CONCLUSIONS : Higher E/e', indicating diastolic dysfunction, may be associated with 90-day mortality in patients with acute ischemic stroke. The DONE score could readily predict poor outcome after acute ischemic stroke.