Crochetage sign may predict late atrial arrhythmias in patients with secundum atrial septal defect undergoing transcatheter closure

•Atrial septal defect (ASD) is one of the most common congenital heart diseases.•Atrial arrhythmias, are well-known complications of ASD and associated with morbidity, and mortality.•Increased pulmonary artery pressure, shunt size, advanced age and RA dilatation are associated with late atrial arrhythmias.•Crochetage sign is a possible marker of long-standing hemodynamic overload.•Crochetage sign may be used to predict the risk of late atrial arrhythmia occurrence after percutaneous ASD closure.