Use of multisite electroanatomic mapping to facilitate ablation of intra-atrial reentry following the Mustard procedure

Ablation of intra-atrial reentrant tachycardia following Mustard or Senning procedures has low success rates. The Biosense Carto(R) system was used to map intra-atrial reentry in a 22-year-old woman who had undergone a Mustar d procedure. A line of block was created connecting a Mustard baffle suture line to the tricuspid valve annulus, which terminated the arrhythmia and p revented its reinitiation. Multisite electoanatomic mapping was invaluable in defining atrial anatomy and the intra-atrial reentrant pathway, and in c reating a contiguous line of block. This mapping may improve ablation succe ss rates in patients following the Mustard or Senning repair.