Effects of atrial septal defects on the cardiac conduction system.

The case report presented in this edition by Mu et al. The report presents a case of atrial septal defect (ASD) associated with electrocardiographic changes, noting that the crochetage sign resolved after Selective His Bundle Pacing (S-HBP) without requiring surgical closure. The mechanisms behind the appearance and resolution of the crochetage sign remain unclear. The authors observed the disappearance of the crochetage sign post-S-HBP, suggesting a possible correlation between these specific R waves and the cardiac conduction system. This editorial aims to explore various types of ASD and their relationship with the cardiac conduction system, highlighting the diagnostic significance of the crochetage sign in ASD.