March 16, 2022Frontiers in PhysiologyOpen Access

Simultaneous Whole-Chamber Non-contact Mapping of Highest Dominant Frequency Sites During Persistent Atrial Fibrillation: A Prospective Ablation Study

Q: What is the clinical evidence from this study?

Study design: Observational. Population: Persistent Atrial Fibrillation (n=10). Intervention: Highest dominant frequency (HDF)-guided ablation. Primary outcome: Increase in AF cycle length (AFCL) ≥ 10 ms or AF termination per ablated region.

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Key result

Ablating highest dominant frequency sites prolongs AFCL or terminates arrhythmia in ~39% of targeted regions.

n=10

Why the study?

Highest dominant frequency sites are implicated in persistent atrial fibrillation mechanisms, but the feasibility and substrate impact of prospectively identifying and ablating dynamic left atrial HDF sites via global simultaneous mapping was unknown.

Does prospectively identifying and ablating dynamic left atrial highest dominant frequency (HDF) sites improve AF cycle length and terminate persistent atrial fibrillation?

Population

10 persAF patients with no prior ablation history

Comparison

Targeted ablation of prospectively identified dynamic HDF regions prior to pulmonary vein isolation

Design

Prospective ablation study

Follow-up

1 year

Authors

GCGavin S. Chu XLXin Li PSPeter J. Stafford

Discussion

Member takes

Overview

HDF ablation may organize persistent AF in select cases; hypothesis-generating and should not yet change practice.

Study Design

Type

Observational (n=10)

Structured PICO

Does prospectively identifying and ablating dynamic left atrial highest dominant frequency (HDF) sites improve AF cycle length and terminate persistent atrial fibrillation?

Population

10 patients with persistent atrial fibrillation (persAF) with no previous ablation history, median AF duration 219 days, mean age 57.7, on uninterrupted oral anticoagulation.

Intervention

Global simultaneous left atrial non-contact mapping to identify highest dominant frequency (HDF) regions, followed by targeted radiofrequency ablation of these sites prior to pulmonary vein isolation (PVI).

Outcome

Change in AF cycle length (AFCL) (≥ 10 ms considered significant) following ablation of each region.surrogate

Targeting dynamic highest dominant frequency sites during persistent AF ablation is feasible and can organize or terminate AF, though it lacks specificity for identifying the relevant arrhythmogenic substrate.

Limitations

Small patient cohort (N=10)
Voltage thresholding for isopotential map analysis may have precluded visualization of lower amplitude signals
Decreased signal quality for Array geometry points located more than 40 mm from the Array
Cumulative effect of sequentially targeted ablation may alter spectral characteristics at distant sites
Lack of confirmatory epicardial data makes endo-epi interaction findings observational and hypothesis-generating

Cite This Study

Chu et al. (2022) conducted an observational in Persistent Atrial Fibrillation (n=10). Highest dominant frequency (HDF)-guided ablation was evaluated on Increase in AF cycle length (AFCL) ≥ 10 ms or AF termination per ablated region. Prospectively targeting and ablating dynamic highest dominant frequency sites in patients with persistent atrial fibrillation resulted in a significant increase in atrial fibrillation cycle length or arrhythmia termination in 39% of the targeted regions.

synapsesocial.com/papers/6a0f4faf853d174eb2ed0f88 https://doi.org/10.3389/fphys.2022.826449

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March 16, 2022Frontiers in PhysiologyOpen Access

Simultaneous Whole-Chamber Non-contact Mapping of Highest Dominant Frequency Sites During Persistent Atrial Fibrillation: A Prospective Ablation Study

View Full Paper

Ask AI

Bookmark

Key result

Ablating highest dominant frequency sites prolongs AFCL or terminates arrhythmia in ~39% of targeted regions.

n=10

Why the study?

Does prospectively identifying and ablating dynamic left atrial highest dominant frequency (HDF) sites improve AF cycle length and terminate persistent atrial fibrillation?

Population

10 persAF patients with no prior ablation history

Comparison

Targeted ablation of prospectively identified dynamic HDF regions prior to pulmonary vein isolation

Design

Prospective ablation study

Follow-up

1 year

Authors

GCGavin S. Chu XLXin Li PSPeter J. Stafford

Discussion

Member takes

Overview

HDF ablation may organize persistent AF in select cases; hypothesis-generating and should not yet change practice.

Study Design

Type

Observational (n=10)

Structured PICO

Does prospectively identifying and ablating dynamic left atrial highest dominant frequency (HDF) sites improve AF cycle length and terminate persistent atrial fibrillation?

Population

10 patients with persistent atrial fibrillation (persAF) with no previous ablation history, median AF duration 219 days, mean age 57.7, on uninterrupted oral anticoagulation.

Intervention

Outcome

Change in AF cycle length (AFCL) (≥ 10 ms considered significant) following ablation of each region.surrogate

Limitations

Small patient cohort (N=10)
Voltage thresholding for isopotential map analysis may have precluded visualization of lower amplitude signals
Decreased signal quality for Array geometry points located more than 40 mm from the Array
Cumulative effect of sequentially targeted ablation may alter spectral characteristics at distant sites
Lack of confirmatory epicardial data makes endo-epi interaction findings observational and hypothesis-generating

Cite This Study

synapsesocial.com/papers/6a0f4faf853d174eb2ed0f88 https://doi.org/10.3389/fphys.2022.826449

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

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