Impaired Left Atrial Function in Patients with Embolic Stroke of Undetermined Source

Background/Objectives: Embolic Stroke of Undetermined Source (ESUS) refers to non-lacunar ischemic stroke without an identified cause and is presumed to be related to a cardioembolic mechanism. A potential etiological factor is atrial fibrosis leading to left atrial (LA) dysfunction, also known as atrial cardiomyopathy. This study aimed to compare advanced transthoracic echocardiographic parameters of LA function in patients with ESUS and age- and sex-matched controls.