Publication: Ablation catheter–induced mechanical deformation in myocardium: computer modeling and ex vivo experiments
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Issued Date
2024-11-01
Resource Type
ISSN
01400118
eISSN
17410444
Scopus ID
2-s2.0-85194825163
Journal Title
Medical and Biological Engineering and Computing
Volume
62
Issue
11
Start Page
3283
End Page
3292
Rights Holder(s)
SCOPUS
Bibliographic Citation
Medical and Biological Engineering and Computing Vol.62 No.11 (2024) , 3283-3292
Suggested Citation
Ijima Y., Masnok K., Perez J.J., González-Suárez A., Berjano E., Watanabe N. Ablation catheter–induced mechanical deformation in myocardium: computer modeling and ex vivo experiments. Medical and Biological Engineering and Computing Vol.62 No.11 (2024) , 3283-3292. 3292. doi:10.1007/s11517-024-03135-7 Retrieved from: https://hdl.handle.net/20.500.14740/20444
Corresponding Author(s)
Other Contributor(s)
Abstract
Cardiac catheter ablation requires an adequate contact between myocardium and catheter tip. Our aim was to quantify the relationship between the contact force (CF) and the resulting mechanical deformation induced by the catheter tip using an ex vivo model and computational modeling. The catheter tip was inserted perpendicularly into porcine heart samples. CF values ranged from 10 to 80 g. The computer model was built to simulate the same experimental conditions, and it considered a 3-parameter Mooney-Rivlin model based on hyper-elastic material. We found a strong correlation between the CF and insertion depth (ID) (R2 = 0.96, P < 0.001), from 0.7 ± 0.3 mm at 10 g to 6.9 ± 0.1 mm at 80 g. Since the surface deformation was asymmetrical, two transversal diameters (minor and major) were identified. Both diameters were strongly correlated with CF (R2 ≥ 0.95), from 4.0 ± 0.4 mm at 20 g to 10.3 ± 0.0 mm at 80 g (minor), and from 6.4 ± 0.7 mm at 20 g to 16.7 ± 0.1 mm at 80 g (major). An optimal fit between computer and experimental results was achieved, with a prediction error of 0.74 and 0.86 mm for insertion depth and mean surface diameter, respectively. Graphical Abstract: (Figure presented.).