High-density electroanatomic mapping with grid catheter in pediatrics and congenital heart disease

Johannes C. von Alvensleben, Amneet Sandhu, Shu Chang, D. Martin Runciman, Melissa Wehrmann, D. Wendy Tzou, Michal Schäfer, Kathryn K. Collins

Research output: Contribution to journalArticlepeer-review


Background: The Advisor™ HD Grid mapping catheter (Abbott Laboratories; Chicago, IL) allows for bipolar electrogram collection in both orthogonal and perpendicular planes, unique when compared to traditional and branch catheters. Experience in pediatric patients and congenital heart disease (CHD) is limited. The purpose of this work was to evaluate the utility and safety of the Advisor™ HD Grid mapping catheter in pediatric and CHD populations. Methods: Retrospective review of all pediatric patients and those with CHD (regardless of age) at Children’s Hospital Colorado and University of Colorado undergoing electrophysiologic study in which the Advisor™ HD Grid mapping catheter was utilized. Results: Sixty-five procedures in 60 patients (N = 31 female (47.6%), median age 17 years (15–24.1)) were included. Patients had CHD in 30 procedures (46.1%). Eight-eight arrhythmia substrates were mapped including atrial flutter/intra-atrial reentrant tachycardia (N = 33), focal atrial tachycardia (N = 20), isolated PVCs (N = 10), accessory pathways (N = 9), atrioventricular nodal reentrant tachycardia (N = 7), right ventricular substrate mapping (N = 7), and ventricular tachycardia (N = 2). Median time per map was 11.8 (7.5–20.1) min with 3.2 (± 1.7) maps per procedure and a median of 2634 (1767–7654) points used per map. Patients with CHD required more maps (p < 0.001) and points per map (p < 0.001). Ablation was successful in 92.4% of procedures. Conclusions: The Advisor™ HD Grid mapping catheter is safe and effective in the pediatric and congenital heart disease population. A wide variety of arrhythmia substrates can be mapped with high point density and low mapping time.

Original languageEnglish (US)
JournalJournal of Interventional Cardiac Electrophysiology
StateAccepted/In press - 2022
Externally publishedYes


  • Ablation
  • Adult congenital heart disease
  • Congenital heart disease
  • Electroanatomic mapping
  • Pediatric

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)


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