Pre-ablation inducibility of AVNRT was recorded. However, cryoablation may have higher recurrence than radiofrequency ablation (RFA) and the optimal procedural endpoint remains undefined.OBJECTIVE: The purpose of this study was to identify the association of cryoablation procedural endpoints with post-procedural AVNRT recurrence.METHODS: We performed a single-center, retrospective analysis of pediatric patients following successful first-time cryoablation for AVNRT between and.

View details for DOI 10.1016/j.jacc.2022.05.053īACKGROUND: Cryoablation is increasingly used to treat atrioventricular nodal reentry tachycardia (AVNRT) due to its safety profile. Increased Vp, higher QRS z-score, and nonapical ventricular lead position are all associated with higher risk of adverse outcome and may be modifiable risk factors. Within the PPMv population, higher Vp (HR: 1.009 per % P=0.009), higher QRS z-score (HR: 1.19 P=0.009) and nonapical lead position (HR: 2.17 P=0.042) were all associated with death/transplantation.CONCLUSIONS: PPMv in patients with SV is associated with increased risk of heart transplantation and death, despite controlling for increased associated morbidity of the PPMv cohort. Across 213 matched pairs, multivariable HR for death/transplant associated with PPMv was 3.8 (95%CI 1.9-7.6 P< 0.001). Median percent ventricular pacing (Vp) was 90.8% (25th-75th percentile: 4.3%-100%) in the PPMv cohort. Median age at enrollment was 5.3 years (quartiles: 1.5-13.2 years), follow-up 6.9 years (3.4-11.6 years).

Primary outcome was transplantation or death.RESULTS: In total, 236 PPMv subjects and 213 matched controls were identified (22 centers, 9 countries). Controls were matched 1:1 to PPMv subjects by ventricular morphology and sex, identified within center, and enrolled at matched age.

Centers contributed baseline and longitudinal data for functionally SV patients with PPMv. Previous studies have identified that the need for a permanent ventricular pacing system (PPMv) may be associated with additional adverse long-term outcomes.OBJECTIVES: The goal of this study was to quantify the attributable risk of PPMv in patients with SV, and to identify modifiable risk factors.METHODS: This international study was sponsored by the Pediatric and Congenital Electrophysiology Society. BACKGROUND: Palliation of the single ventricle (SV) circulation is associated with a burden of lifelong complications.

On A Life's Edge by J.L. Whitaker