Embolic risk in atrial fibrillation (AF) related to hyperthyroidism is controversial Transesophageal echocardiography (TEE) abnormalities can predict an embolic event CHA2DS2-VASc is the main clinical tool to guide antithrombotic therapy CHA2DS2-VASc score is highly related to transesophageal echocardiography findings No association between TEE and CHA2DS2-VASc in AF related to hyperthyroidism