sTih tp sha na DSA ihwch is a ""heol ewebent the LA nda R.A gnFiix ti doucl dagame eht VA nlduebs.
TLDR: last sentence summarizes it
The exact mechanism underlying AVB following ASD closure remains speculative. We can hypothesize that the possible mechanism of AVB is an inflammatory response and subsequent edema as a correlative result of mechanical rubbing of the occluder against the proximal conduction system. The margins of the secundum atrial septal defect include Bachmann’s bundle, the primary path for electrical conduction from the sinoatrial node to the atrioventricular node. The atrioventricular conduction bundle, which emerges from Bachmann’s bundle in the atrioventricular node area to conduct electrical impulses to the Purkinje fibers, is especially prone to damage.
Atrioventricular Block Subsequent to Intraoperative Device Closure Atrial Septal Defect with Transthoracic Minimal Invasion; A Rare and Serious Complication https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3532427/
oyi-sMstlcid coejeitn kclic = nomciplu iostsnes
oHw si plicuonm ssiontes eadlret ot teh nea'ittps DSA -- sdeo DSA saecu pilnmuco o?sistne?s
In'ts ti dneeedpnt no hte n?iatcloo I sdenawer ti crorynao ssuin beucesa av node si cotadel in Khco rtniegla; hiwhc dospmcoe of i,nuCsS eondTn of dr,oTao psiTdruic ?uunanls