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June 27, 2026EP EuropaceOpen Access

Lattice-tip dual-energy catheter terminates atypical atrial flutter at initial ablation sites in ~79% of patients.

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Why the study?

Atypical atrial flutter consists of complex macro-reentrant circuits requiring 3D-EAM, prompting evaluation of mapping and ablation using a novel high-density 3D-EAM system.

Does mapping and ablation using a lattice-tip dual-energy catheter terminate tachycardia in patients with atypical atrial flutter?

Population

65 patients with atypical atrial flutter and activation mapping covering >80% of tachycardia cycle length

Comparison

High-density mapping and ablation with an expandable 9-mm lattice-tip, multipolar, dual-energy catheter

Design

Prospective cohort study

Follow-up

Median 69 (48.8–116) days

Key result

Mapping and ablation of atypical atrial flutter using a novel lattice-tip dual-energy catheter achieved tachycardia termination at or near the initial ablation site in 79.4% of patients.

Authors

ECE ChiarazzoMMM MarinoVFV M La Fazia

Discussion

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Overview

Supports targeted initial ablation for acute termination; leaves open long-term efficacy versus standard approaches in larger trials.

Key Points

  • To assess the feasibility of using a novel high-density mapping system for ablating atypical atrial flutter.
  • Analyzed data from 673 patients with atypical atrial flutter, collected prospectively.
  • Used a 9-mm lattice-tip, multipolar, dual-energy catheter for mapping and ablation.
  • Primary outcome was tachycardia termination at the initial or surrounding ablation site.
  • Achieved procedural success in all cases (100%), with tachycardia termination in 79.4% of patients.
  • Median follow-up of 69 days showed atrial flutter recurrence in 15% of patients.
  • Estimated event-free survival rates at 1, 3, and 6 months were 88.3%, 85.1%, and 79.7%, respectively.

Study Design

Type

Cohort (n=65)

Structured PICO

Does mapping and ablation using a lattice-tip dual-energy catheter terminate tachycardia in patients with atypical atrial flutter?

P
Population
65 patients with atypical atrial flutter (mean age 71.3 years, 36.9% female) who underwent mapping and ablation with a novel lattice-tip catheter, followed for a median of 69 days.
E
Exposure
Mapping and ablation targeting the critical isthmus using an expandable 9-mm lattice-tip, multipolar, dual-energy catheter (toggling between radiofrequency and pulsed field energy).
O
Outcome
Termination of the tachycardia at the initial ablation site or within the surrounding area.surrogate

Mapping and ablation of atypical atrial flutter using a novel lattice-tip dual-energy catheter is feasible, achieving 100% procedural success and high rates of tachycardia termination.

Cite This Study

Chiarazzo et al. (2026) conducted a cohort in Atypical atrial flutter (AAFL) (n=65). Mapping and ablation using an expandable 9-mm lattice-tip, multipolar, dual-energy catheter was evaluated on Termination of the tachycardia at the initial ablation site or within the surrounding area. Mapping and ablation of atypical atrial flutter using a novel lattice-tip dual-energy catheter achieved tachycardia termination at or near the initial ablation site in 79.4% of patients.

synapsesocial.com/papers/6a3f97bb125782b61d865955https://doi.org/10.1093/europace/euag105.577
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