LAUSR

1078 the risk of both left atrial (LA) thrombus and ischemic stroke.3‐5 Yet, some patients develop LA thrombus and experience thromboembolic events despite OAC.6‐9 The CHA2DS2‐VASc ‐RAF (conges‐ tive heart failure, hypertension, age ≥75 years, di‐ abetes mellitus, history of stroke or thromboem‐ bolism, vascular disease, age 65 to 74 years, fe‐ male sex, renal dysfunction, type of AF) score has been recently proposed to improve LA thrombus prediction in AF.9 The aim of the study is to assess the preva‐ lence of LA thrombus in real ‐world patients with AF or AFl referred for transesophageal echocardiography (TEE), to identify predictors Introduction Since its establishment 25 years ago, the “Club 30” of the Polish Cardiac Society has gathered young Polish scientists with mean‐ ingful achievements in cardiology.1 The “Club 30” Scientific Platform has been created to facilitate initiation of and participation in multicenter stud‐ ies among its users, and to promote integration of scientific community.2 Multicenter cooperation, empowered by the platform, results in an increase in the number of enrolled patients and, conse‐ quently, enhances research quality and chances for publication in high ‐profile journals. In patients with atrial fibrillation (AF) and atri‐ al flutter (AFl), oral anticoagulation (OAC) reduces Correspondence to: Agnieszka Kapłon ‐Cieślicka, MD, PhD, 1st Chair and Department of Cardiology, Medical University of Warsaw, ul. Banacha 1a, 02‐097 Warszawa, Poland, phone: +48 22 599 29 58, email: [email protected] Received: August 5, 2019. Revision accepted: October 4, 2019. Published online: October 4, 2019. Kardiol Pol. 2019; 77 (11): 1078‐1080 doi:10.33963/KP.15011 Copyright by the Author(s), 2019 S H O R T C O M M U N I C A T I O N