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High-Resolution Endocardial and Epicardial Optical Mapping in a Sheep Model of Stretch-Induced Atrial Fibrillation
Published on: July 29, 2011
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Spatially Conserved Spiral Wave Activity During Human Atrial Fibrillation
Wouter-Jan Rappel1, Tina Baykaner2, Junaid Zaman3
1Department of Physics, University of California, San Diego (W.-J.R.).
Circulation. Arrhythmia and Electrophysiology
|February 13, 2024
Summary
Intermittent spiral wave activity in atrial fibrillation is often due to conserved, not newly created, waves. This finding may improve atrial fibrillation treatment by identifying key wave behaviors.
Area of Science:
- Cardiology
- Computational Biology
- Medical Physics
Background:
- Atrial fibrillation (AF) is a common arrhythmia increasing stroke risk.
- AF involves disorganized electrical activity, including spiral wave patterns.
- Clinical observation of intermittent spiral waves contrasts with simulation findings.
Purpose of the Study:
- To investigate the nature of intermittent spiral wave activity in atrial fibrillation.
- To compare in silico spiral wave behavior with clinical recordings.
- To determine if observed spiral waves are conserved or newly generated.
Main Methods:
- Simulated spiral wave dynamics under different conditions (continuous creation/annihilation, trapping).
- Constructed spatio-temporal activation maps from 64-electrode catheter recordings in 34 AF patients.
- Quantified spiral wave presence, rotation, and phase-locking behavior.
Main Results:
- Simulated spiral waves were consistently out of phase.
- In 68% of patients, spiral waves returned in phase, indicating conservation.
- Intermittent activity in patients stems from conserved spiral waves, not new ones.
Conclusions:
- Intermittent spiral wave activity in AF patients is primarily due to conserved waves of interrupted duration.
- This understanding could refine AF classification and guide therapeutic strategies.
- Distinguishing conserved from transient spiral waves is crucial for patient management.
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