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Ablation time efficiency and lesion volume - in vitro comparison of 4 mm, non irrigated, gold- and platinum-iridium-tip radiofrequency ablation catheters

  • Tibor BalázsEmail author
  • Romola Laczkó
  • Eszter Bognár
  • Serkan Akman
  • Péter Nagy
  • Endre Zima
  • János Dobránszky
  • Tamás Szili-Török
Article

Abstract

Purpose

We investigated the development of in vitro lesion formation in relation to ablation time and power delivery using 4-mm, non-irrigated, platinum–iridium (Pt/Ir), and gold-tip catheters.

Methods

Radiofrequency catheter ablation was performed on porcine liver preparations in a 5–60-s time range with 5 s increments applied at different lesion sites. Each series was repeated four times for both catheters. The lesion volume, the delivered energy, and the ablation power curves were analyzed in 96 ablations.

Results

The delivered energy was higher and the lesion volume was significantly larger when using a gold-tip catheter. The lesion volume that was created with the Pt/Ir-tip electrode within 60 s was created after a shorter 40 s ablation period with the gold-tip electrode (Au, 40 s, 345 ± 75 mm3 vs. Pt/Ir, 60 s, 328 ± 30 mm3).

Conclusion

The gold-tip catheters had a lower tip temperature resulting in higher energy delivery due to the better thermo-conductivity of the gold alloy. A significantly higher lesion volume and a faster lesion creation were found for gold catheters as compared to Pt/Ir catheters. Gold-tip catheters can create the same adequate lesion within 33.3 % less ablation time due to the higher values of delivered energy as compared to those observed with the use of Pt/Ir catheters.

Keywords

Radiofrequency ablation Gold-tip electrode Platinum–iridium-tip electrode Lesion volume Ablation time 

Notes

Conflict of interest

T.B. is a PhD student at the Department of Materials Science and Engineering, Budapest University of Technology and Economics and an employee of BIOTRONIK Hungary Ltd, Budapest. S.A. is an employee of BIOTRONIK SE & Co. KG. T. SZ-T. is a consultant of BIOTRONIK.

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Tibor Balázs
    • 1
    Email author
  • Romola Laczkó
    • 1
  • Eszter Bognár
    • 1
  • Serkan Akman
    • 2
  • Péter Nagy
    • 1
  • Endre Zima
    • 3
  • János Dobránszky
    • 1
  • Tamás Szili-Török
    • 4
  1. 1.Department of Materials Science and EngineeringBudapest University of Technology and EconomicsBudapestHungary
  2. 2.BIOTRONIK SE & Co. KGBerlinGermany
  3. 3.Semmelweis University Heart CenterBudapestHungary
  4. 4.Erasmus Medical CenterRotterdamNetherlands

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