Combined Pulsed-field Ablation (PFA) and Left Atrial Appendage Occlusion Using Watchman Flx or Amulet

Официальное название

Combined Pulsed-field Ablation (PFA) and Left Atrial Appendage Occlusion Using Watchman Flx or Amulet: A Randomized Controlled Study

Обзор

AF ablation is an established treatment option for non-valvular atrial fibrillation (NVAF). While AF ablation helps to maintain cardiac rhythm in sinus, the stroke risk associated with AF persists after ablation. Oral anticoagulant (OAC) therapy is currently the standard therapy before and after successful ablation. Percutaneous LAA Occlusion (LAAO) has been emerged as an alternative to oral anticoagulants for stroke prophylaxis in patients who refused or contraindicated to OAC. As both AF ablation and percutaneous LAAO require transseptal access from to left atrium, combining the two procedures into one single procedure may provide a straightforward strategy aiming at concomitant rhythm control as well as stroke prevention, without the additional risk of multiple procedures. It is showed in previous studies that this approach is feasible and safe. Pulsed-field ablation (PFA) is a non-thermal ablation technology that uses high amplitude pulsed electrical fields to ablate tissues through the mechanism of irreversible electroporation. Irreversible electroporation is the application of high electric field to a cell with a resultant increased permeability of the membrane and downstream cell death. Success with PFA depends upon the proximity of the electrode to the target tissue, but not necessarily upon contact. Therefore, with PFA the transseptal access for successful AF ablation is less demanding. Moreover, PFA would induce less pulmonary ridge edema compared to conventional ablation techniques and could potentially causes less PDL. Watchman Flx (Boston Scientific) and Amulet (Abbott) are the two most commonly used LAAO devices. The two devices have different designs, deployment requirements and occlusion results. Both devices have been used in combined procedure. However, there is no data of combined AF ablation and LAAO using the PFA technique, and of combined AF ablation comparing the use of Watchman Flx versus Amulet device. In this randomized controlled study, we aim to assess the feasibility and compare the peri-procedural outcomes and LAA occlusion result of combined AF ablation (using the PFA technique), and LAAO using either the Watchman Flx or the Amulet device.

Подробное описание

Atrial fibrillation (AF) is the most common cardiac arrythmia globally. Its prevalence ranges between 2-4% worldwide. It is associated with significant morbidity and mortality. AF ablation is an established treatment option for non-valvular atrial fibrillation (NVAF). While AF ablation helps to maintain cardiac rhythm in sinus, the stroke risk associated with AF persists after ablation. Oral anticoagulant (OAC) therapy is currently the standard therapy before and after successful ablation. Percutaneous LAA Occlusion (LAAO) has been emerged as an alternative to oral anticoagulants for stroke prophylaxis in patients who refused or contraindicated to OAC . As both AF ablation and percutaneous LAAO require transseptal access from to left atrium, combining the two procedures into one single procedure may provide a straightforward strategy aiming at concomitant rhythm control as well as stroke prevention, without the additional risk of multiple procedures. It is showed in previous studies that this approach is feasible and safe. However, the current AF ablation techniques (radiofrequency ablation and cryoballoon ablation) requires a less posterior transseptal access while LAAO requires a posterior-inferior transseptal access. This could potentially make LAAO after same procedure AF ablation using the same transseptal access more challenging. Besides, current ablation techniques would induce edema over pulmonary ridge, which could potentially result in significant peri-device leak (PDL) post LAAO after edema subsided. Pulsed-field ablation (PFA) is a non-thermal ablation technology that uses high amplitude pulsed electrical fields to ablate tissues through the mechanism of irreversible electroporation. Irreversible electroporation is the application of high electric field to a cell with a resultant increased permeability of the membrane and downstream cell death. Success with PFA depends upon the proximity of the electrode to the target tissue, but not necessarily upon contact. Therefore, with PFA the transseptal access for successful AF ablation is less demanding. Moreover, PFA would induce less pulmonary ridge edema compared to conventional ablation techniques and could potentially causes less PDL. Watchman Flx (Boston Scientific) and Amulet (Abbott) are the two most commonly used LAAO devices. The two devices have different designs, deployment requirements and occlusion results. Both devices have been used in combined procedure. However, there is no data of combined AF ablation and LAAO using the PFA technique, and of combined AF ablation comparing the use of Watchman Flx versus Amulet device. In this randomized controlled study, we aim to assess the feasibility and compare the peri-procedural outcomes and LAA occlusion result of combined AF ablation (using the PFA technique), and LAAO using either the Watchman Flx or the Amulet device.

Вмешательства

• Устройство Combined Pulsed-field Ablation (PFA) + Left Atrial Appendage Occlusion (LAAO)
  Pulsed-field ablation (PFA) is a non-thermal ablation technology that uses high amplitude pulsed electrical fields to ablate tissues through the mechanism of irreversible electroporation Percutaneous LAA Occlusion (LAAO) has been emerged as an alternative to oral anticoagulants for stroke prophylaxis in patients who refused or contraindicated to OAC

Первичные конечные точки

• Rate of >=moderate peri-device leak (i.e. >=3mm) on follow-up TEE [Срок оценки: 45-90 days]

Вторичные конечные точки (10)

• LAAO technical success rate [Срок оценки: Baseline]
• Rate of procedural related complications [Срок оценки: baseline, 45-90 days, 6-months, 12-months]
• Total ablation time [Срок оценки: baseline, 45-90 days, 6-months, 12-months]
• LAAO procedural time [Срок оценки: baseline, 45-90 days, 6-months, 12-months]
• Need of additional transseptal puncture for LAAO [Срок оценки: baseline, 45-90 days, 6-months, 12-months]
• Number of device recapture (full or partial) [Срок оценки: baseline, 45-90 days, 6-months, 12-months]
• Number of device used [Срок оценки: baseline, 45-90 days, 6-months, 12-months]
• PFA acute technical success [Срок оценки: baseline, 45-90 days, 6-months, 12-months]
• AF ablation procedural success [Срок оценки: baseline, 45-90 days, 6-months, 12-months]
• Number of Participants with 1-year clinical events [Срок оценки: baseline, 45-90 days, 6-months, 12-months]

Критерии участия

Критерии включения

• Paroxysmal or persistent non- valvular atrial fibrillation
• CHADS2-VASc >=2
• Age >=18; and able to give written consent

Критерии исключения

• are in permanent atrial fibrillation
• are not eligible for 3 months of oral anticoagulant post ablation
• has left Atrial thrombus identified by pre-procedure TEE or during procedure
• had received prior left atrial appendage closure procedure (percutaneous or surgical)
• are planned to receive concomitant ablation procedure or structural heart interventions other than AF ablation and LAAO (e.g SVT ablation, Aflutter ablation, PFO closure, leadless pacemaker, ASD Closure, etc)
• patient whom refused or cannot tolerate procedural or post procedural follow-up TEE

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Распределение

Рандомизированное

Модель

Параллельные группы

Маскирование

Открытое

Основная цель

Лечение

Центры проведения

Гонконг · 1 центр

• Prince of Wales Hospital — Гонконг

Публикации

• Hindricks G, Potpara T, Dagres N, Arbelo E, Bax JJ, Blomstrom-Lundqvist C, Boriani G, Castella M, Dan GA, Dilaveris PE, Fauchier L, Filippatos G, Kalman JM, La Meir M, Lane DA, Lebeau JP, Lettino M, Lip GYH, Pinto FJ, Thomas GN, Valgimigli M, Van Gelder IC, Van Putte BP, Watkins CL; ESC Scientific Document Group. 2020 ESC Guidelines for the diagnosis and management of atrial fibrillation developed PMID 32860505
• January CT, Wann LS, Calkins H, Chen LY, Cigarroa JE, Cleveland JC Jr, Ellinor PT, Ezekowitz MD, Field ME, Furie KL, Heidenreich PA, Murray KT, Shea JB, Tracy CM, Yancy CW. 2019 AHA/ACC/HRS Focused Update of the 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practic PMID 30703431
• Phillips KP, Walker DT, Humphries JA. Combined catheter ablation for atrial fibrillation and Watchman(R) left atrial appendage occlusion procedures: Five-year experience. J Arrhythm. 2016 Apr;32(2):119-26. doi: 10.1016/j.joa.2015.11.001. Epub 2015 Dec 8. PMID 27092193
• Swaans MJ, Alipour A, Rensing BJ, Post MC, Boersma LV. Catheter ablation in combination with left atrial appendage closure for atrial fibrillation. J Vis Exp. 2013 Feb 26;(72):e3818. doi: 10.3791/3818. PMID 23486416
• Alipour A, Swaans MJ, van Dijk VF, Balt JC, Post MC, Bosschaert MAR, Rensing BJ, Reddy VY, Boersma LVA. Ablation for Atrial Fibrillation Combined With Left Atrial Appendage Closure. JACC Clin Electrophysiol. 2015 Dec;1(6):486-495. doi: 10.1016/j.jacep.2015.07.009. Epub 2015 Oct 22. PMID 29759402
• Calvo N, Salterain N, Arguedas H, Macias A, Esteban A, Garcia de Yebenes M, Gavira JJ, Barba J, Garcia-Bolao I. Combined catheter ablation and left atrial appendage closure as a hybrid procedure for the treatment of atrial fibrillation. Europace. 2015 Oct;17(10):1533-40. doi: 10.1093/europace/euv070. Epub 2015 May 1. PMID 25935163
• Fassini G, Conti S, Moltrasio M, Maltagliati A, Tundo F, Riva S, Dello Russo A, Casella M, Majocchi B, Zucchetti M, Russo E, Marino V, Pepi M, Tondo C. Concomitant cryoballoon ablation and percutaneous closure of left atrial appendage in patients with atrial fibrillation. Europace. 2016 Nov;18(11):1705-1710. doi: 10.1093/europace/euw007. Epub 2016 Jul 11. PMID 27402623
• Phillips KP, Pokushalov E, Romanov A, Artemenko S, Folkeringa RJ, Szili-Torok T, Senatore G, Stein KM, Razali O, Gordon N, Boersma LVA. Combining Watchman left atrial appendage closure and catheter ablation for atrial fibrillation: multicentre registry results of feasibility and safety during implant and 30 days follow-up. Europace. 2018 Jun 1;20(6):949-955. doi: 10.1093/europace/eux183. PMID 29106523

Идентификаторы

NCT: NCT05560204 · 2022.494

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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