Influence of underlying substrate on @entity4710 after XXXX .

@entity1 @entity591 @entity358 @entity955 @entity4710
BACKGROUND: Recurrent @entity4710 as a result of residual atrial arrhythmogenic substrates after @entity955 ( @entity955 ) ablation. In @entity1 with @entity955 , electrograms with reduced amplitudes indicate diseased myocardium. OBJECTIVE: The purpose of this study was to investigate the association between the distribution of low-voltage areas and the type of induced @entity4710 . METHODS: Our prospective observational study enrolled 152 consecutive @entity955 @entity1 scheduled for an initial ablation (46% persistent @entity955 ). After @entity358 , voltage mapping was performed during sinus rhythm, and regions with reduced electrogram amplitudes (<0.5 mV) were defined as low-voltage areas. Burst pacing was performed to investigate the inducibility of @entity4710 . RESULTS: Low-voltage areas were more frequently observed in @entity1 with persistent @entity955 than paroxysmal @entity955 (50% vs 34%, P = .048). A higher proportion of @entity1 with low-voltage areas presented with inducibility of @entity4710 than those without, as follows: @entity955 70% vs 16% (P = .0001); perimitral macroreentrant @entity591 ( @entity591 ) 18% vs 0% (P = .0001); and roof-dependent macroreentrant @entity591 13% vs 0% (P = .01). Investigation into the regional distribution of low-voltage areas revealed that @entity1 with perimitral macroreentrant @entity591 more frequently coincided with low-voltage areas than those without in the septal (100% vs 18%, P <.0001) and anterior regions (55% vs 11%, P = .001), and those with roof-dependent @entity591 in the roof (75% vs 15%, P <.0001) and posterior regions (75% vs 15%, P = .0001). CONCLUSION: Low-voltage areas are associated with high inducibility of @entity4710 after @entity358 . In addition, the distribution of low-voltage areas is specific for each type of macroreentrant @entity591 .
