Key result
Multielectrode mapping yields ~39% smaller low-voltage areas and sharper electrograms versus linear ablation catheters.
Why the study?
Multielectrode catheters report smaller low-voltage areas than linear ablation catheters, but the underlying electrogram differences had not been elucidated.
Does voltage mapping with a multielectrode catheter compared to a linear ablation catheter change the measurement of low-voltage areas and electrogram waveforms in patients undergoing ablation for persistent atrial fibrillation?
Population
17 consecutive patients undergoing ablation for persistent AF
Comparison
Mapping with a multielectrode catheter vs a linear ablation catheter
Design
Prospective observational study
Authors
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Catheter choice may alter substrate maps; leaves open catheter-specific voltage thresholds for ablation guidance.
Observational (n=17)
Does voltage mapping with a multielectrode catheter compared to a linear ablation catheter change the measurement of low-voltage areas and electrogram waveforms in patients undergoing ablation for persistent atrial fibrillation?
Absolute Event Rate: 5.9% vs 9.7%
Multielectrode mapping catheters produce smaller low-voltage area measurements with sharper and higher voltage electrograms compared to linear ablation catheters, particularly in diseased atrial tissue.
Masuda et al. (2019) conducted an observational in persistent atrial fibrillation (n=17). Multielectrode mapping catheter vs. Linear ablation catheter was evaluated on Low-voltage areas (LVAs) <0.50 mV in cm2. Voltage mapping with a multielectrode catheter produced smaller low-voltage area measurements (5.9 vs 9.7 cm2) with sharper and higher voltage electrograms compared to a linear ablation catheter.
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