RIGHT ATRIAL APPENDAGE TO RIGHT VENTRICLE ACCESSORY ATRIOVENTRICULAR CONNECTION - A CASE-REPORT

Atrial and ventricular attachments of accessory atrioventricular conne ctions have classically been localized to adjacent atrial and ventricu lar tissues, and this principle is responsible for the widespread succ ess of radiofrequency catheter ablation. We present anatomical evidenc e of an unusually located accessory atrioventricular connection, which bridged the atrioventricular ring epicardially, directly from the bas e of the right atrial appendage to the right ventricle. This observati on might offer a new insight into unusual accessory atrioventricular c onnection locations and may explain why some endocardial radiofrequenc y catheter ablation procedures might fail.