Influence of patient factors and ablative technologies on outcomes of radiofrequency ablation of intra-atrial re-entrant tachycardia in patients with congenital heart disease
John K. Triedman, MD, FACC*,*,
Mark E. Alexander, MD*,
Barry A. Love, MD, FACC ,
Kathryn K. Collins, MD ,
Charles I. Berul, MD, FACC*,
Laura M. Bevilacqua, MD* and
Edward P. Walsh, MD, FACC*
* Department of Cardiology, Boston Children’s Hospital, Boston, Massachusetts, USA
Division of Cardiology, Montreal Children’s Hospital, Montreal, Canada
Department of Pediatrics, University of California, San Francisco, San Francisco, California, USA
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Figure 1 Acute outcomes of intra-atrial re-entrant tachycardia ablation. In the initial 71 cases, standard techniques for mapping and ablation were used. Irrigated ablation was applied in selected cases after that and was applied in 9/36 procedures using standard mapping techniques. Electroanatomic mapping was used in 69/71 most recent procedures, with irrigated ablation used in 30 of those procedures. Black bars = complete procedural success (termination of all targeted circuits); white bars = limited procedural success (termination of at least one circuit).
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Figure 2 Clinical arrhythmia score before radiofrequency (RF) ablation and during follow-up. (A) Aggregated scores for all procedures, mean values ± SD. (B) Individual follow-up scores and trend lines for procedures classified as long-term unfavorable outcome (open symbols, dashed line) and long-term favorable outcome (closed symbols, solid line).
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