How to detect atrial fibrosis.

Area of Science:

• Cardiology
• Medical Imaging

Background:

• Advanced imaging techniques have emerged over the last two decades to evaluate atrial function.
• These methods are crucial for predicting atrial fibrillation recurrence post-treatment and diagnosing atrial remodeling, especially fibrosis.

Purpose of the Study:

• To review the role of novel imaging techniques in assessing atrial structural and functional changes.
• To discuss the application of echocardiography and cardiac magnetic resonance in diagnosing atrial fibrosis and predicting atrial fibrillation recurrence.

Main Methods:

• Echocardiography with speckle tracking imaging analyzes atrial wall deformation (strain and strain rate) for functional assessment.
• Cardiac magnetic resonance (CMR) with gadolinium contrast enhancement visualizes and quantifies atrial fibrosis in vivo.

Main Results:

• Echocardiography can predict new-onset and recurrent atrial fibrillation by assessing atrial function.
• CMR is the established method for visualizing myocardial fibrotic tissue, correlating atrial fibrosis with recurrence risk and electro-anatomical mapping.

Conclusions:

• Echocardiography and CMR are valuable tools for evaluating atrial remodeling and predicting atrial fibrillation recurrence.
• Limitations include inter-observer variability, software differences, and challenges in correlating imaging with histology, necessitating standardization for improved reproducibility.