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To the Editor: Increasing concerns about the potential for atrioventricular (AV) block after transcatheter closure of perimembranous ventricular septal defect (VSD) were emphasised by Ian Sullivan in a recent issue of Heart.1 This complication has been highlighted in a clinical series published by Walsh et al.2 Their patients developed heart block after closure of perimembranous VSD (pmVSD) within 10 days of the procedure. Because of two instances of very late onset of complete atrioventricular block (cAVB) 24 …
Competing interests: None declared.