Related Experiment Videos
[The activation patterns during atrial fibrillation in an experimental model]
F J Chorro1, L Mainar, J Sanchis
1Servicio de Cardiología, Hospital Clínico Universitario, Valencia.
Revista Espanola De Cardiologia
|June 16, 1999
Summary
Random activation patterns are more common than complete reentry in experimental atrial fibrillation. Focal activation is rare, and reentry can occur in small areas.
Area of Science:
- Cardiovascular Physiology
- Electrophysiology
- Cardiac Arrhythmias
Context:
- Atrial fibrillation (AF) mechanisms include reentry and focal activation.
- Understanding AF activation patterns is crucial for developing effective therapies.
- Previous studies have described various AF activation patterns.
Purpose:
- To analyze and quantify atrial activation patterns in an experimental model of atrial fibrillation.
- To differentiate between random activation, complete reentry, and focal activation in AF.
Summary:
- This study induced atrial fibrillation in 11 Langendorff-perfused rabbit hearts.
- A 121-electrode array mapped atrial activation over 100 ms segments.
- Results showed 40% random activation, 14% complete reentry, and 44% single/dual fronts without re-excitation.
Impact:
- Random activation patterns are more frequent than complete reentry in this AF model.
- Complete reentry can occur in areas smaller than 1 cm².
- Focal activation patterns are rare during experimental atrial fibrillation.