Computational Modeling of Open-Irrigated Electrodes for Radiofrequency Cardiac Ablation Including Blood Motion-Saline Flow Interaction
Por:
Gonzalez-Suarez, A, Berjano, E, Guerra, JM, Gerardo-Giorda, L
Publicada:
3 mar 2016
Resumen:
Radiofrequency catheter ablation (RFCA) is a routine treatment for cardiac arrhythmias. During RFCA, the electrode-tissue interface temperature should be kept below 80 degrees C to avoid thrombus formation. Open-irrigated electrodes facilitate power delivery while keeping low temperatures around the catheter. No computational model of an open-irrigated electrode in endocardial RFCA accounting for both the saline irrigation flow and the blood motion in the cardiac chamber has been proposed yet. We present the first computational model including both effects at once. The model has been validated against existing experimental results. Computational results showed that the surface lesion width and blood temperature are affected by both the electrode design and the irrigation flow rate. Smaller surface lesion widths and blood temperatures are obtained with higher irrigation flow rate, while the lesion depth is not affected by changing the irrigation flow rate. Larger lesions are obtained with increasing power and the electrode-tissue contact. Also, larger lesions are obtained when electrode is placed horizontally. Overall, the computational findings are in close agreement with previous experimental results providing an excellent tool for future catheter research.
Filiaciones:
Gonzalez-Suarez, A:
BCAM, Bilbao, Basque Country, Spain
Berjano, E:
Univ Politecn Valencia, Biomed Synergy, Dept Elect Engn, E-46022 Valencia, Spain
Guerra, JM:
Hosp Santa Creu & Sant Pau, Dept Cardiol, Barcelona, Spain
Gerardo-Giorda, L:
BCAM, Bilbao, Basque Country, Spain
Gold, Green Published
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