Changes in f-wave characteristics during cryoballoon catheter ablation
Mikael Henriksson1, Arcadi García-Alberola2, Rebeca Goya3
1Department of Biomedical Engineering and Center of Integrative Electrocardiology, Lund University, Lund, Sweden.
Physiological Measurement
|September 6, 2018
Summary
During catheter ablation for atrial fibrillation (AF), f-wave frequency significantly decreases. This study highlights the importance of signal quality for reliable analysis in AF patients.
Area of Science:
- Cardiology
- Medical Imaging
- Electrophysiology
Background:
- Atrial fibrillation (AF) management involves catheter ablation.
- ECG-derived parameters offer insights into AF mechanisms.
- Cryoballoon ablation is a common AF treatment modality.
Purpose of the Study:
- To investigate changes in ECG-derived f-wave parameters during cryoballoon catheter ablation for AF.
- To assess the impact of AF type (paroxysmal/persistent) on these parameters.
- To evaluate the role of a signal quality index (SQI) in reliable analysis.
Main Methods:
- A model-based statistical approach was used to analyze f-wave frequency, morphology, and phase dispersion.
- Seventy-seven AF patients undergoing de novo cryoballoon ablation were included.
- Analyzable ECG segments were identified using a signal quality index (SQI).
Main Results:
- f-wave frequency significantly decreased during ablation (p=0.001), particularly after ablation of the inferior right pulmonary vein.
- Significant differences in frequency and phase dispersion were observed between paroxysmal and persistent AF (p=0.001 and p<0.05, respectively).
Conclusions:
- A decrease in f-wave frequency is a distinguishable marker during catheter ablation.
- The use of an SQI is crucial for ensuring reliable ECG analysis in AF patients.
- ECG parameter analysis can differentiate between paroxysmal and persistent AF.
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