Indications for cardiac imaging before a cardioversion or left atrial interventional procedure in patients with atrial fibrillation lasting <48 h (A) and ≥48 h (B). AF, atrial fibrillation; BMI, body mass index; CV, cardioversion; GUCH, Grown Up Congenital Heart; LA, left atrium; NOAC, non-vitamin K antagonist oral anticoagulant; OAC, oral anticoagulant; VKA, vitamin K antagonist. ^aValvular AF defined as mitral valve stenosis or a prosthetic valve. ^bChronic kidney disease defined as a glomerular filtration rate of <60 mL/min/1.73 m² for >3 months.