LAUSR

458 We included 89 patients who underwent success‐ ful elective DCCV between November 2015 and August 2018 with ejection fraction during SR of 40% or greater and no moderate or severe valve disease. Left atrial wall deformation analysis was performed using STE during SR on the day after successful DCCV. We used the upslope of the R wave as the electrocardiography reference point for strain and pLASR measurements as recommended in the consensus document.8 Left atrial myocardial deformation assessed during SR after successful cardioversion was presented as the LA strain or as the peak strain rate dur‐ ing the reservoir phase (LASr or pLASRr), con‐ duit phase (LAScd or pLASRcd), and contractile phase (LASct or pLASRct) in the apical 4‐cham‐ ber (4c) and 2‐chamber (2c) views, and the av‐ erage of both views (mean) as recommended in the consensus document.8