Local Impedance Guided Radiofrequency Ablation with Standard and High Power: Results of a Preclinical Investigation

2021 ◽  
Author(s):  
Kofi Osei ◽  
Matthew S. Sulkin ◽  
Jason J. Hamann ◽  
Christopher Hughes ◽  
Allan Shuros ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
High Power ◽  
Preclinical Investigation

Proactive Esophageal Cooling Protects Against Thermal Insults During High-Power Short-Duration Radiofrequency Ablation

2021 ◽  
Author(s):  
Marcela Mercado-Montoya ◽  
Tatiana Gomez-Bustamante ◽  
Enrique Berjano ◽  
Steven Mickelsen ◽  
James Daniels ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
Short Duration ◽  
High Power

High‐power short‐duration versus standard radiofrequency ablation: Insights on lesion metrics

2018 ◽  
Vol 29 (11) ◽  
pp. 1570-1575 ◽  
Author(s):  
Felix Bourier ◽  
Josselin Duchateau ◽  
Konstantinos Vlachos ◽  
Anna Lam ◽  
Claire A. Martin ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
Short Duration ◽  
High Power

Radiofrequency ablation with a high-power generator: Device efficacy in anin vivoporcine liver model

2007 ◽  
Vol 23 (4) ◽  
pp. 387-394 ◽  
Author(s):  
C. L. Brace ◽  
P. F. Laeseke ◽  
L. A. Sampson ◽  
T. M. Frey ◽  
R. Mukherjee ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
High Power ◽  
Power Generator ◽  
Liver Model

scholarly journals Thermal and electric Characteristics of High-power Short-duration Radiofrequency Ablation and Standard Radiofrequency Ablation: A Computer Simulation Study

2021 ◽  
Author(s):  
Kaihao Gu ◽  
Shengjie Yan ◽  
Xiaomei Wu
Keyword(s):  
Radiofrequency Ablation ◽  
Short Duration ◽  
High Power ◽  
Lesion Size ◽  
Lesion Volume ◽  
Rf Ablation ◽  
Thermal Lesion ◽  
Lesion Depth ◽  
Lesion Diameter ◽  
Rate Of Increase

Abstract Background: High power-short duration ablation is an emerging conception for cardiac RF treatment. But the biophysical ablation properties of this technique have not been fully explored. This study compared the electric field characteristics and thermal lesion dimension in High power-short duration (HP-SD) radio frequency (RF) ablation and standard RF ablation by using the finite element method. Results: The results demonstrated that the lesion size and temperature in HP–SD RF ablation increased faster than standard RF ablation. The thermal lesion volume in both ablation modes demonstrated a linear increase and the rate of increase of HP–SD RF ablation grew faster than that of standard RF ablation. For HP–SD application at 50 W for 5 s, the lesion depth was shallower (1.74 to 2.1 mm vs 2.40 to 3.15 mm) and the surface lesion diameter was broader (2.76 to 3.32 mm vs 2.42 to 2.66 mm) than that for standard RF ablation at 25 W for 30 s. Conclusion: Compared with standard RF ablation, HP–SD RF ablation creates a broader lesion width and surface lesion diameter but shallower lesion depth, with a faster increase in temperature. HP–SD ablation is more able to achieve uniform and contiguous lesion shape, which is a suitable for point-to-point RF ablation procedures.Higher temperature was formed in deeper space of cardiac tissue in HP–SD ablation. The duration of HP–SD ablation should be strictly controlled for preventing the steam occur in tissue.

scholarly journals High-power, Short-duration Radiofrequency Ablation for the Treatment of AF

2020 ◽  
Vol 8 (4) ◽  
pp. 265-272 ◽  
Author(s):  
Irum D Kotadia ◽  
Steven E Williams ◽  
Mark O’Neill
Keyword(s):  
Radiofrequency Ablation ◽  
Short Duration ◽  
High Power ◽  
Clinical Studies ◽  
Ablation Lesion ◽  
Lesion Formation ◽  
Clinical Value ◽  
Temperature Recording ◽  
Procedural Time ◽  
Tissue Oedema

High-power, short-duration (HPSD) ablation for the treatment of AF is emerging as an alternative to ablation using conventional ablation generator settings characterised by lower power and longer duration. Although the reported potential advantages of HPSD ablation include less tissue oedema and collateral tissue damage, a reduction in procedural time and superior ablation lesion formation, clinical studies of HPSD ablation validating these observations are limited. One of the main challenges for HPSD ablation has been the inability to adequately assess temperature and lesion formation in real time. Novel catheter designs may improve the accuracy of intra-ablation temperature recording and correspondingly may improve the safety profile of HPSD ablation. Clinical studies of HPSD ablation are on-going and interpretation of the data from these and other studies will be required to ascertain the clinical value of HPSD ablation.

scholarly journals Is high-power radiofrequency ablation of atrial fibrillation less painful than standard approach in conscious patients?

2020 ◽  
Author(s):  
Maciej W jcik ◽  
Przemys aw Zaj c ◽  
Rados aw G ca ◽  
Pawe B aszkiewicz ◽  
Jan Zar bski ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Radiofrequency Ablation ◽  
High Power ◽  
Standard Approach

Impact of High-Power Short-Duration Radiofrequency Ablation on Esophageal Temperature Dynamic

2021 ◽  
Author(s):  
Hagai D. Yavin ◽  
Zachary P. Bubar ◽  
Koji Higuchi ◽  
Jakub Sroubek ◽  
Mohamed Kanj ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
Pulmonary Vein ◽  
Short Duration ◽  
Pulmonary Vein Isolation ◽  
High Power ◽  
Temperature Rise ◽  
Esophageal Injury ◽  
Esophageal Temperature ◽  
Dynamic Profile ◽  
Temperature Dynamic

Background: High-power short-duration (HP-SD) radiofrequency ablation (RFA) has been proposed as a method for producing rapid and effective lesions for pulmonary vein isolation. The underlying hypothesis assumes an increased resistive heating phase and decreased conductive heating phase, potentially reducing the risk for esophageal thermal injury. The objective of this study was to compare the esophageal temperature dynamic profile between HP-SD and moderate-power moderate-duration (MP-MD) RFA ablation strategies. Methods: In patients undergoing pulmonary vein isolation, RFA juxtaposed to the esophagus was delivered in an alternate sequence of HP-SD (50 W, 8–10 s) and MP-MD (25 W, 15–20 s) between adjacent applications (distance, ≤4 mm). Esophageal temperature was recorded using a multisensor probe (CIRCA S-CATH). Temperature data included magnitude of temperature rise, maximal temperature, time to maximal temperature, and time return to baseline. In swine, a similar experimental design compared the effect of HP-SD and MP-MD on patterns of esophageal injury. Results: In 20 patients (68.9±5.8 years old; 60% persistent atrial fibrillation), 55 paired HP-SD and MP-MD applications were analyzed. The esophageal temperature dynamic profile was similar between HP-SD and MP-MD ablation strategies. Specifically, the magnitude of temperature rise (2.1 °C [1.4–3] versus 2.0 °C [1.5–3]; P =0.22), maximal temperature (38.4 °C [37.8–39.3] versus 38.5 °C [37.9–39.4]; P =0.17), time to maximal temperature (24.9±7.5 versus 26.3±6.8 s; P =0.1), and time of temperature to return to baseline (110±23.2 versus 111±25.1 s; P =0.86) were similar between HP-SD and MP-MD ablation strategies. In 6 swine, esophageal injury was qualitatively similar between HP-SD and MP-MD strategies. Conclusions: Esophageal temperature dynamics are similar between HP-SD and MP-MD RFA strategies and result in comparable esophageal tissue injury. Therefore, when using a HP-SD RFA strategy, the shorter application duration should not prompt shorter intervals between applications.

scholarly journals Use of Tissue Electric and Ultrasound Characteristics to Predict and Prevent Steam-Generated Cavitation During High-Power Radiofrequency Ablation

2018 ◽  
Vol 4 (4) ◽  
pp. 491-500 ◽  
Author(s):  
Duy T. Nguyen ◽  
Matthew Zipse ◽  
Ryan T. Borne ◽  
Lijun Zheng ◽  
Wendy S. Tzou ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
High Power
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