Pediatric/Adult Congenital Heart Disease -> Pediatric Cardiology D-PO05 - Poster Session V (ID 39) Poster

D-PO05-036 - Use Of The Advisor™ HD Grid Mapping Catheter In Pediatric Patients And Those With Congenital Heart Disease (ID 617)

 M. Wehrmann: Nothing relevant to disclose.
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Background: The Advisor™ HD Grid mapping catheter (Abbott Laboratories; Chicago, IL) has 16 equidistant electrodes that allow for bipolar electrogram collection in both orthogonal and perpendicular planes; unique when compared to traditional and branch catheters. Its utility has been previously reported for atrial and ventricular arrhythmias in adults.
Objective: To evaluate the utility and safety of the Advisor™ HD Grid mapping catheter in pediatric and congenital heart disease populations.
Methods: Single center retrospective review of all patients at Children’s Hospital Colorado from May 2018 to November 2019 undergoing electrophysiologic study in which the Advisor™ HD Grid mapping catheter was utilized.
Results: Thirty-one patients (15 (48.4%) female, median age 16 years (10-36), median weight 62.9 kg (30.7-124)) were included. Thirteen had structurally abnormal hearts (41.9%); 12 congenital heart disease, 1 acquired structural heart disease. Three had cardiomyopathy (9.7%); 2 primary myopathy syndromes and 1 with pacing induced myopathy.
Thirty-seven separate arrhythmia substrates were mapped including focal atrial tachycardia (n=13), atrioventricular reentrant tachycardia (AVRT) (n=3), intraatrial reentrant tachycardia (IART) (n=14), and ventricular tachycardia/PVCs (n=7). For the total cohort (median (range)) total time mapping was 43.25 min (7.45-154), with 3 maps (1-8), 2752 points per map (1076-17454), and 14 min mapping (2.5-66.2) per map. AVRT required the shortest total mapping time (12.8 min (7.4-14.6)) and time per map (4.8 min (2.5-6.4)) while IART required the longest total mapping time (63.5 min (24.63-114.8)) but second shortest time per map (9.9 min (7-25.5 min)). There was no significant difference in mapping right sided (n=5) versus left sided (n=2) ventricular substrates: median total 43.5 vs 57.8 min (p=0.67), median time per map 24.9 vs 34.6 min (p=0.51). There were no complications.
Conclusion: The Advisor™ HD Grid mapping catheter is safe and effective to use in the pediatric and congenital heart disease populations. A wide variety of arrhythmia substrates can be mapped with high point density and low mapping time.