Detailed analysis of the lesion formation using a diamond tip catheter in an ex vivo experimental model

Sasaki, Wataru; Matsumoto, Kazuhisa; Higuchi, Syunta; Mori, Hitoshi; Fukaya, Hidehira; Kawano, Daisuke; Tanaka, Naomichi; Narita, Masataka; Tsutsui, Kenta; Ikeda, Yoshifumi; Arai, Takahide; Nakano, Shintaro; Kato, Ryuichi

doi:10.1016/j.jjcc.2023.03.006

Cited by 2 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lesion dimensions from 5 to 15-s applications with the DTA system have been shown to be independent of the level of applied force [21]. Counter to this, Sasaki et al [37] demonstrated increased applied force positively correlated with lesion dimensions with 6-s applications; however, these measurements appear to be inclusive of steam pop events. Interestingly, this study also presented a non-linear relationship between lesion dimensions as application duration lengthens.…”

Section: Lesion Biophysics With Temperature-controlled Rfmentioning

confidence: 98%

“…Our results support these findings that the ability to titrate power based on an accurate tip-tissue temperature will ultimately result in consistent lesion formation across a range of clinically relevant applied forces. Temperature-controlled ablation produces similar-sized lesions to power-controlled ablations and increasing contact force in the latter is associated only with an increased risk of steam pop [21,34,37].…”

Section: Lesion Biophysics With Temperature-controlled Rfmentioning

confidence: 99%

See 1 more Smart Citation

Characterizing lesion morphology of a novel diamond-tip temperature-controlled irrigated radiofrequency ablation catheter

Dhanjal

Schmidt

Getman

et al. 2023

J Interv Card Electrophysiol

View full text Add to dashboard Cite

Background The DiamondTemp ablation (DTA) system is a novel temperature-controlled irrigated radiofrequency (RF) ablation system that accurately measures tip-tissue temperatures for real-time power modulation. Lesion morphologies from longer RF durations with the DTA system have not been previously described. We sought to evaluate lesion characteristics of the DTA system when varying the application durations. Methods A bench model using porcine myocardium was used to deliver discrete lesions in a simulated clinical environment. The DTA system was power-limited at 50 W with temperature set-points of 50 °C and 60 °C (denoted Group_50 and Group_60). Application durations were randomized with a range of 5–120 s. Results In total, 280 applications were performed. Steam pops were observed in five applications: two applications at 90 s and three applications at 120 s. Lesion size (depth and maximum width) increased significantly with longer applications, until 60 s for both Group_50 and Group_60 (depth: 4.5 ± 1.2 mm and 5.6 ± 1.3 mm; maximum width: 9.3 ± 2.7mm and 11.2 ± 1.7mm, respectively). As lesions transition from resistive to conductive heating (longer than 10 s), the maximum width progressed in a sub-surface propagation. Using a “Time after Temperature 60 °C” (TaT60) analysis, depths of 2–3 mm occur in 0–5 s and depths plateau at 4.6 ± 0.8 mm between 20 and 30 s. Conclusions The DTA system rapidly creates wide lesions with lesion depth increasing over time with application durations up to 60 s. Using a TaT60 approach is a promising ablation guidance that would benefit from further investigation.

show abstract

Section: Lesion Biophysics With Temperature-controlled Rfmentioning

confidence: 98%

Section: Lesion Biophysics With Temperature-controlled Rfmentioning

confidence: 99%