Circulation. Arrhythmia and electrophysiology, Volume 14, Issue 8, 19 3 2021, Pages e009777 Anatomical Characteristics of the Left Atrium and Left Atrial Appendage in Relation to the Risk of Stroke in Patients With Versus Without Atrial Fibrillation. Smit JM, Simon J, El Mahdiui M, Szaraz L, van Rosendael PJ, Kolassváry M, Szilveszter B, Delgado V, Merkely B, Maurovich-Horvat P, Bax JJ