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Updated: Jul 27, 2025
08:10
Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
Published on: July 20, 2022
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Left Atrial Function Predicts Atrial Arrhythmia Recurrence Following Ablation of Long-Standing Persistent Atrial
Habib Rehman Khan1, Haci Yakup Yakupoglu2, Ines Kralj-Hans2
1London Health Sciences Centre, University of Western Ontario, London, Canada (H.R.K.).
Circulation. Cardiovascular Imaging
|June 8, 2023
Summary
Following ablation for persistent atrial fibrillation (AF), improved left atrial (LA) function, particularly LA contractile strain, predicts rhythm maintenance. Enhanced LA function post-ablation is key to preventing AF recurrence.
Area of Science:
- Cardiology
- Electrophysiology
- Cardiac Imaging
Background:
- Long-standing persistent atrial fibrillation (AF) poses challenges for ablation success.
- Left atrial (LA) function is crucial in AF pathophysiology and recurrence.
- The CASA-AF trial investigates catheter vs. surgical ablation for persistent AF.
Purpose of the Study:
- To assess left atrial (LA) function after ablation for persistent AF.
- To determine the impact of LA function on AF recurrence.
- To compare outcomes between catheter and surgical ablation in the CASA-AF trial.
Main Methods:
- Echocardiography (2D, speckle tracking) evaluated LA structure and function (reservoir, conduit, contractile strain).
- Left ventricular diastolic function assessed via transmitral Doppler and tissue Doppler.
- Continuous rhythm monitoring used implantable loop recorders.
Main Results:
- Eighty-three patients analyzed; 30 maintained sinus rhythm, 53 had recurrence.
- Improved LA emptying fraction, reservoir strain, and contractile strain observed in sinus rhythm patients.
- LA contractile strain at 3 months post-ablation independently predicted AF recurrence.
Conclusions:
- Ablation for persistent AF improves LA function, with greater improvement in those maintaining sinus rhythm.
- LA contractile strain is the primary determinant of AF recurrence post-ablation.
- These findings highlight the importance of LA function assessment in AF management.
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