Raw data. Abstract Pulsed wave tissue Doppler imaging (PW-TDI) easily detects motion of cardiac structures. Hence, PW-TDI could be of value for assessing potentially cardioembolic masses. We sought to evaluate the prognostic value of left ventricular (LV) thrombus mobility assessed by PW-TDI. In 83 consecutive patients with echocardiographically detected LV thrombi, PW-TDI echocardiographic study was performed. At 1-year follow-up, the composite of major adverse cardiovascular events (MACE) defined as all-cause mortality plus hospitalizations for stroke/systemic embolism was evaluated. Seventy-two patients (77.1 + 13.1 year/old, 32 males) were studied. All thrombi were located at the LV apex. At 1-year follow-up, 17 cardioembolic events occurred. By univariable Cox analysis, variables associated with MACE were heart rate (hazard ratio: 1.02, 95% CI: 1.00-1.05; P ¼ .03), thrombi with mobile free edge (hazard ratio: 3.25, 95% CI: 1.25-8.44; P ¼ .01), hypoechoic thrombi (hazard ratio: 2.86, 95% CI: 1.10-7.42; P ¼ .03), and mass peak antegrade velocity (Va) 10 cm/s (hazard ratio: 8.79, 95% CI: 2.00-38.5; P ¼ .004). By multivariable analysis, thrombi with mobile free edge (hazard ratio: 3.54, 95% CI: 1.23-10.2; P ¼ .02), and mass peak Va 10 cm/s (hazard ratio: 7.97, 95% CI: 1.60-39.6; P ¼ .01) retained statistical significance. Mass peak Va 10 cm/s predicted the composite end point with 94% sensitivity and 85% specificity (area under the curve ¼ 0.86). In conclusion, PW-TDI allows objective prognostication of LV thrombi embolic risk.