What question did this study set out to answer?

October 1, 2011Circulation Arrhythmia and ElectrophysiologyOpen Access

Recovery of Mitral Isthmus Conduction Leads to the Development of Macro-Reentrant Tachycardia After Left Atrial Linear Ablation for Atrial Fibrillation

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Why the study?

Does recovery of mitral isthmus conduction lead to macro-reentrant tachycardia after left atrial linear ablation for atrial fibrillation?

Population

Patients undergoing left atrial linear ablation for atrial fibrillation

Design

Other

Authors

NSNavinder SawhneyWashington University in St. Louis KAKislay AnandSan Diego Cardiac Center CRClare E RobertsonSan Diego Cardiac Center

Discussion

Member takes

Implication

May warrant vigilance for recurrent tachycardia after mitral isthmus ablation; leaves open whether durable block improves long-term outcomes.

Key Points

To evaluate the occurrence of mitral isthmus conduction recovery following left atrial linear ablation for atrial fibrillation and determine its contribution to post-procedural macro-reentrant tachycardia.
Assessed electrical conduction across the mitral isthmus following linear catheter ablation in patients treated for atrial fibrillation using bidirectional block as a procedural endpoint.
Mitral isthmus conduction recovery occurs frequently despite the acute achievement of bidirectional conduction block during linear ablation.
Restoration of mitral isthmus conduction facilitates the development of macro-reentrant left atrial tachycardia, likely secondary to distinct isthmus anatomy or reduced ablation power delivery relative to the right atrium.

Structured PICO

Does recovery of mitral isthmus conduction lead to macro-reentrant tachycardia after left atrial linear ablation for atrial fibrillation?

Population

Patients undergoing left atrial linear ablation for atrial fibrillation

Intervention

Left atrial linear ablation (mitral isthmus ablation)

Outcome

Recovery of mitral isthmus conduction and development of left atrial tachycardia (LAT)

Recovery of mitral isthmus conduction after left atrial linear ablation for atrial fibrillation is a common occurrence that can lead to the development of macro-reentrant left atrial tachycardia.

Cite This Study

Sawhney et al. (2011) studied this question.

synapsesocial.com/papers/69eee0110fb71af24d311a19 https://doi.org/10.1161/circep.111.964817

Topics

Atrial fibrillation Persistent AF management AF ablation outcomes

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Implication

May warrant vigilance for recurrent tachycardia after mitral isthmus ablation; leaves open whether durable block improves long-term outcomes.

Recovery of Mitral Isthmus Conduction Leads to the Development of Macro-Reentrant Tachycardia After Left Atrial Linear Ablation for Atrial Fibrillation

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Recovery of Mitral Isthmus Conduction Leads to the Development of Macro-Reentrant Tachycardia After Left Atrial Linear Ablation for Atrial Fibrillation

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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Topics

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