1
|
Kuroda M, Takeo A, Kobayashi H, Kuji R, Mori H, Tsutsui K, Fukunaga M, Nagashima M, Korai K, Ando K, Hiroshima K. Influence of the irrigation flow pattern and catheter tip design on the lesion formation: an ex vivo experimental model. J Interv Card Electrophysiol 2024; 67:589-597. [PMID: 37691083 DOI: 10.1007/s10840-023-01633-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 08/30/2023] [Indexed: 09/12/2023]
Abstract
BACKGROUND Lesion formation during catheter ablation is influenced by the power, contact force (CF), time, and catheter stability. However, the influence of the irrigation effects on lesion formation remains unknown. METHODS An ex vivo experiment using conductive gel was performed. Using three different catheter designs (TactiFlex ™ SE [TF], IntellaNav MiFi ™ OI [MiFi], QDOT MICRO™ [QDOT]), a cross-sectional analysis of the lesion size and surface lesion type of 10g/40W lesions with a combination of various ablation times was performed in protocol 1. A longitudinal analysis (combination of various powers [30, 40, and 50W] and various ablation times with a 10g setting) was performed to investigate the influence of the auto-regulated irrigation system (QDOT) on lesion formation in protocol 2. RESULTS The lesion formation with the QDOT catheter tended to create larger ablation lesions, while that with the TF catheter created smaller lesions than the other catheters. The lesion surface characteristics were divided into two patterns: ring (MiFi catheter and QDOT) and crescent (TF) patterns. The auto-regulated irrigation system did not influence the lesion formation, and the relationship between the lesion formation and RF energy exhibited similar changes regardless of the ablation power setting. CONCLUSION The lesion formation and lesion surface characteristics differed among the different irrigation tip designs. An auto-regulated irrigation system did not affect the lesion creation or surface lesion characteristics. Care should be given to the inter-product differences in the lesion characteristics during RF catheter ablation, partly due to the irrigation flow control and tip design.
Collapse
Affiliation(s)
- Maiko Kuroda
- Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan.
| | - Ayaka Takeo
- Department of Clinical Engineering, Kokura Memorial Hospital, Kitakyushu, Japan
| | - Hiroki Kobayashi
- Department of Clinical Engineering, Kokura Memorial Hospital, Kitakyushu, Japan
| | - Rei Kuji
- Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan
| | - Hitoshi Mori
- Department of Cardiology, International Medical Center, Saitama Medical University, Saitama, Japan.
| | - Kenta Tsutsui
- Department of Cardiology, International Medical Center, Saitama Medical University, Saitama, Japan
| | - Masato Fukunaga
- Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan
| | - Michio Nagashima
- Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan
| | - Kengo Korai
- Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan
| | - Kenji Ando
- Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan
| | - Kenichi Hiroshima
- Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan
| |
Collapse
|
2
|
Masuda M, Inoue K, Tanaka N, Watanabe T, Makino N, Egami Y, Oka T, Minamiguchi H, Miyoshi M, Okada M, Kanda T, Mano T, Matsuda Y, Uematsu H, Sakio T, Kawasaki M, Sunaga A, Sotomi Y, Dohi T, Nakatani D, Hikoso S, Sakata Y. Long-Term Impact of Additional Ablation After Pulmonary Vein Isolation: Results From EARNEST-PVI Trial. J Am Heart Assoc 2023; 12:e029651. [PMID: 37642022 PMCID: PMC10547359 DOI: 10.1161/jaha.123.029651] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 05/30/2023] [Indexed: 08/31/2023]
Abstract
Background An optimal strategy for left atrial ablation in addition to pulmonary vein isolation (PVI) in patients with persistent atrial fibrillation (AF) has not been determined. Methods and Results We conducted an extended follow-up of the multicenter randomized controlled EARNEST-PVI (Efficacy of Pulmonary Vein Isolation Alone in Patients With Persistent Atrial Fibrillation) trial, which compared 12-month rhythm outcomes in patients with persistent AF between patients randomized to a PVI-alone strategy (n=248) or PVI-plus strategy (n=248; PVI followed by left atrial additional ablation, including linear ablation or ablation targeting areas with complex fractionated electrograms). The present study extended the follow-up period to 3 years after enrollment. Outcomes were compared not only between randomly allocated groups but also between on-treatment groups categorized by actually created ablation lesions. Recurrence rate of AF or atrial tachycardia (AT) was lower in the randomly allocated to PVI-plus group than the PVI-alone group (29.0% versus 37.5%, P=0.036). On-treatment analysis revealed that patients with PVI+linear ablation (n=205) demonstrated a lower AF/AT recurrence rate than those with PVI only (26.3% versus 37.8%, P=0.007). In contrast, patients with PVI+complex fractionated electrograms ablation (n=37) had an AF/AT recurrence rate comparable to that of patients with PVI only (40.5% versus 37.8%, P=0.76). At second ablation in 126 patients with AF/AT recurrence, ATs excluding common atrial flutter were more frequent in patients with PVI+linear ablation than in those with PVI only (32.6% versus 5.7%, P<0.0001). Conclusions Left atrial ablation in addition to PVI was efficacious during 3-year follow-up. Linear ablation was superior to other ablation strategies but may increase iatrogenic ATs. Registration URL: http://www.umin.ac.jp/ctr/index-j.htm; Unique identifier: UMIN000019449.
Collapse
Affiliation(s)
| | - Koichi Inoue
- Cardiovascular DivisionNational Hospital Organization Osaka National HospitalOsakaJapan
| | - Nobuaki Tanaka
- Cardiovascular CenterSakurabashi Watanabe HospitalOsakaJapan
| | | | | | | | - Takafumi Oka
- Department of Cardiovascular MedicineOsaka University Graduate School of MedicineOsakaJapan
| | | | - Miwa Miyoshi
- Department of CardiologyOsaka Hospital, Japan Community Healthcare OrganizationOsakaJapan
| | - Masato Okada
- Cardiovascular CenterSakurabashi Watanabe HospitalOsakaJapan
| | - Takashi Kanda
- Cardiovascular DivisionOsaka Police HospitalOsakaJapan
| | - Toshiaki Mano
- Cardiovascular CenterKansai Rosai HospitalAmagasakiJapan
| | | | | | | | - Masato Kawasaki
- Division of CardiologyOsaka General Medical CenterOsakaJapan
| | - Akihiro Sunaga
- Department of Cardiovascular MedicineOsaka University Graduate School of MedicineOsakaJapan
| | - Yohei Sotomi
- Department of Cardiovascular MedicineOsaka University Graduate School of MedicineOsakaJapan
| | - Tomoharu Dohi
- Department of Cardiovascular MedicineOsaka University Graduate School of MedicineOsakaJapan
| | - Daisaku Nakatani
- Department of Cardiovascular MedicineOsaka University Graduate School of MedicineOsakaJapan
| | - Shungo Hikoso
- Department of Cardiovascular MedicineOsaka University Graduate School of MedicineOsakaJapan
| | - Yasushi Sakata
- Department of Cardiovascular MedicineOsaka University Graduate School of MedicineOsakaJapan
| | | |
Collapse
|
3
|
Fang Z, Li X, Yan S, Si P, Ma F, Zhang W, Zhang B, Zhou T, Yang B. A novel polarity configuration for enhancing ablation depth of pulsed field ablation: Design, modeling, and in vivo validation. Med Phys 2023; 50:5364-5374. [PMID: 37493518 DOI: 10.1002/mp.16621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 06/26/2023] [Indexed: 07/27/2023] Open
Abstract
BACKGROUND Pulsed field ablation (PFA) has been increasingly used to cut off the delivery of abnormal electrical signals in the treatment of cardiac arrhythmias. A successful cut off requires forming a layer of transmural damage on the heart wall, and this layer depends on the depth of ablation by PFA. PURPOSE This study aims to propose a novel polarity configuration of PFA to increase the ablation depth in the treatment of cardiac arrhythmias. METHOD A novel polarity configuration was designed for a multi-electrode system, where the number of electrodes is greater than two. The polarity configuration in such multi-electrode system is called the paired-electrode interlaced configuration (PIC). The existing configuration called the single-electrode interlaced configuration (SIC) was used to compare with the PIC. To both the SIC and PIC, a full-SIC or a full-PIC is called when all electrodes (anode, cathode) in a catheter is used otherwise partial-SIC or partial-PIC is called. By the comparison between the full-SIC and full-PIC, the benefit of the PIC was exhibited as opposed to the SIC, but an extra ablation step was added in the PIC in order to form a continuous ablation zone. The other comparative study was taken between a partial-PIC and a partial-SIC with the same number of ablation step. In this study, a rabbit model was built by infusing 0.4% saline solution (at 37°C) into the rabbit's abdominal cavity which surrounds the liver. This model was considered as a biometric environment of the heart, namely cardiac-mimetic model (CMM). RESULT The experimental results have shown that the full-PIC is superior to the full-SIC in the ablation depth, specifically in both the maximum (4.14 ± 0.55 mm vs. 3.35 ± 0.26 mm, p < 0.01) and the minimum (3.18 ± 0.29 mm vs. 2.76 ± 0.28 mm, p < 0.05), and in the ablation width, specifically only in the maximum (8.27 ± 0.76 mm vs. 7.09 ± 0.51 mm, p = 0.019) under an identical ablation time (i.e., 5 s). It is noted that the minimum ablation width did not show a significant difference between the full-PIC and full-SIC (specifically, 5.61 ± 0.86 mm vs. 4.67 ± 0.73 mm, p = 0.069). Considering the lethal electric field threshold (LEFT) to be 600 V/cm for liver tissues, the maximum and minimum ablation depth generated by the full-PIC was found larger than that by the full-SIC (3.90 vs. 3.52 mm, and 3.03 vs. 2.48 mm, respectively) in the simulation. Meanwhile, similar experiment results by comparing the partial-PIC and partial-SIC have been obtained, which shows a significant increase in both the maximum ablation depth (4.81 ± 0.87 mm vs. 3.30 ± 0.73 mm, p < 0.001) and the maximum ablation width (8.19 ± 0.85 mm vs. 6.47 ± 1.13 mm, p = 0.001). CONCLUSIONS (1) The electric field in the PIC is concentrated around the pair of electrodes, and the pattern of the field is a significant factor in the energy delivery along the direction of the depth. (2) The increase of the ablation depth can significantly expand the range of the tissue on the heart, where the PFA can apply, and can therefore readily form a layer of transmural damage on the heart wall at positions at which the wall is thicker.
Collapse
Affiliation(s)
- Zheng Fang
- Cardiac Electrophysiology R&D Center, APT Medical Inc., Shanghai, China
- Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, Canada
| | - Xiaorong Li
- Department of Cardiology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shengjie Yan
- Centre for Biomedical Engineering, School of Information Science and Technology, Fudan University, Shanghai, China
| | - Peng Si
- Cardiac Electrophysiology R&D Center, APT Medical Inc., Shanghai, China
| | - Fei Ma
- Cardiac Electrophysiology R&D Center, APT Medical Inc., Shanghai, China
| | - Wenjun Zhang
- Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, Canada
| | - Bing Zhang
- Intelligent Energy-based Tumor Ablation Laboratory, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China
| | - Tuo Zhou
- Cardiac Electrophysiology R&D Center, APT Medical Inc., Shanghai, China
| | - Bing Yang
- Department of Cardiology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| |
Collapse
|
4
|
Risk and benefit of extrapulmonary vein ablation in atrial fibrillation. Curr Opin Cardiol 2023; 38:1-5. [PMID: 36598443 DOI: 10.1097/hco.0000000000001002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
PURPOSE OF REVIEW This review aims to summarize the recent development, benefit, and safety of extrapulmonary vein ablation for atrial fibrillation. RECENT FINDING Studies have shown that extrapulmonary vein ablation can help maintain normal sinus rhythm for patients with persistent atrial fibrillation. As prior strategies targeting anatomical lines and triggers are well utilized, novel techniques for substrate mapping have been rapidly developing. These strategies are well tolerated and could be chosen based on patients' conditions and physicians' experience. SUMMARY Extrapulmonary vein ablation could be safely and effectively performed for patients with atrial fibrillation. It provides further consolidation of normal sinus rhythm.
Collapse
|
5
|
Kassa KI, Nagy Z, Simkovits D, Kis Z, Ferenci T, Som Z, Foldesi C, Kardos A. Evaluation of Isolation Area, Myocardial Injury and Left Atrial Function Following High-Power Short-Duration Radiofrequency or Second-Generation Cryoballoon Ablation for Atrial Fibrillation. J Cardiovasc Dev Dis 2022; 9:jcdd9100327. [PMID: 36286279 PMCID: PMC9604661 DOI: 10.3390/jcdd9100327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/24/2022] [Accepted: 09/26/2022] [Indexed: 11/16/2022] Open
Abstract
This randomized study aims to compare the left atrial (LA) lesion size, function, and tissue damage following pulmonary vein isolation (PVI) by high-power short-duration (HPSD) radiofrequency (RF) and second-generation cryoballoon (CB2) ablation. We enrolled 40 patients with paroxysmal atrial fibrillation who underwent PVI by HPSD RF (n = 21) or CB2 (n = 19). Every patient underwent LA CT angiography and transthoracic echocardiography (TTE) to assess the LA anatomy and function. Biomarker levels (hs-cTnT, hs-CRP, LDH) were compared pre- and post-procedurally. Pre- and post-ablation high-density mapping (HDM) was performed. The isolation area was defined under 0.2 mV bipolar voltage (low voltage area, LVA). We calculated the post-PVI LVA/LA surface ratio using LA CT-HDM merge images. At 3-month follow-up, TTE was performed to assess the changes in LA function. Post-ablation hs-cTnT level was significantly higher in the RF group (RF: 1249 ± 469 ng/L, CB2: 995 ± 280 ng/L, p = 0.024). Post-PVI hs-CRP (RF: 9.53 ± 10.30 mg/L, CB2: 12.36 ± 5.76 mg/L, p = 0.034) and LDH levels (RF: 349.9 ± 65.6 U/L, CB2: 451.6 ± 91.3 U/L, p < 0.001) were significantly higher following CB2 ablation. Post-PVI LVA/LA surface ratios were 8.37 ± 6.42% in the RF group and 13.58 ± 8.92% in the CB2 group (p = 0.022). LA function did not change significantly after the PVI procedure. Our data indicate that second-generation cryoballoon ablation produces a significantly larger LA lesion size compared to “point-by-point” HPSD radiofrequency. Both techniques preserve LA function. The myocardial component of tissue loss appears to be higher using HPSD radiofrequency ablation, with less collateral damage.
Collapse
Affiliation(s)
- Krisztian Istvan Kassa
- Karoly Racz Doctoral School of Clinical Medicine, Semmelweis University, 1085 Budapest, Hungary
- Gottsegen National Cardiovascular Center, 1096 Budapest, Hungary
- Correspondence: ; Tel.: +36-305-992-895
| | - Zsofia Nagy
- Gottsegen National Cardiovascular Center, 1096 Budapest, Hungary
| | - Daniel Simkovits
- Gottsegen National Cardiovascular Center, 1096 Budapest, Hungary
| | - Zsuzsanna Kis
- Gottsegen National Cardiovascular Center, 1096 Budapest, Hungary
| | - Tamas Ferenci
- Physiological Controls Research Center, Obuda University, 1034 Budapest, Hungary
- Department of Statistics, Corvinus University of Budapest, 1093 Budapest, Hungary
| | - Zoltan Som
- Gottsegen National Cardiovascular Center, 1096 Budapest, Hungary
| | - Csaba Foldesi
- Gottsegen National Cardiovascular Center, 1096 Budapest, Hungary
| | - Attila Kardos
- Gottsegen National Cardiovascular Center, 1096 Budapest, Hungary
| |
Collapse
|
6
|
Sakamoto K, Mukai Y, Kawai S, Nagaoka K, Inoue S, Takase S, Yakabe D, Ikeda S, Mannoji H, Nagayama T, Chishaki A, Tsutsui H. Intra-atrial activation pattern is useful to localize the areas of non-pulmonary vein triggers of atrial fibrillation. PLoS One 2022; 17:e0264894. [PMID: 35468171 PMCID: PMC9037930 DOI: 10.1371/journal.pone.0264894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 02/19/2022] [Indexed: 11/26/2022] Open
Abstract
Background Pulmonary vein isolation (PVI) is an established ablation procedure for atrial fibrillation (AF), however, PVI alone is insufficient to suppress AF recurrence. Non-pulmonary vein (non-PV) trigger ablation is one of the promising strategies beyond PVI and has been shown to be effective in refractory/persistent AF cases. To make non-PV trigger ablation more standardized, it is essential to develop a simple method to localize the origin of non-PV triggers. Methods We retrospectively analyzed 37 non-PV triggers in 751 ablation sessions for symptomatic AF from January 2017 to December 2020. Regarding non-PV triggers, intra-atrial activation interval from the earliest in right atrium (RA) to proximal coronary sinus (CS) (RA-CSp) and that from the earliest in RA to distal CS (RA-CSd) obtained by a basically-positioned duodecapolar RA-CS catheter were compared among 3 originating non-PV areas [RA, atrial septum (SEP) and left atrium (LA)]. Results RA-CSp of RA non-PV trigger (56.4 ± 23.4 ms) was significantly longer than that of SEP non-PV (14.8 ± 25.6 ms, p = 0.019) and LA non-PV (-24.9 ± 27.9 ms, p = 0.0004). RA-CSd of RA non-PV (75.9 ± 32.1 ms) was significantly longer than that of SEP non-PV (34.2 ± 32.6 ms, p = 0.040) and LA non-PV (-13.3 ± 41.2 ms, p = 0.0008). RA-CSp and RA-CSd of SEP non-PV were significantly longer than those of LA non-PV (p = 0.022 and p = 0.016, respectively). Sensitivity and specificity of an algorithm to differentiate the area of non-PV trigger using RA-CSp (cut-off value: 50 ms) and RA-CSd (cut-off value: 0 ms) were 88% and 97% for RA non-PV, 81% and 73% for SEP non-PV, 65% and 95% for LA non-PV, respectively. Conclusions The analysis of intra-atrial activation sequences was useful to differentiate non-PV trigger areas. A simple algorithm to localize the area of non-PV trigger would be helpful to identify non-PV trigger sites in AF ablation.
Collapse
Affiliation(s)
- Kazuo Sakamoto
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Yasushi Mukai
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, Japan
- Department of Cardiovascular Medicine, Japanese Red Cross Fukuoka Hospital, Okusu, Minami-ku, Fukuoka, Japan
- * E-mail:
| | - Shunsuke Kawai
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, Japan
- Department of Cardiovascular Medicine, Japanese Red Cross Fukuoka Hospital, Okusu, Minami-ku, Fukuoka, Japan
| | - Kazuhiro Nagaoka
- Department of Cardiology, St. Mary’s Hospital, Tsubuku-honmachi, Kurume, Fukuoka, Japan
| | - Shujiro Inoue
- Department of Cardiology, Aso Iizuka Hospital, Yoshio-machi, Iizuka, Fukuoka, Japan
| | - Susumu Takase
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Daisuke Yakabe
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, Japan
- Department of Cardiology, Kyushu Medical Center, Jigyohama, Chuo-ku, Fukuoka, Japan
| | - Shota Ikeda
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Hiroshi Mannoji
- Department of Cardiology, Hamanomachi Hospital, Nagahama, Chuo-ku, Fukuoka, Japan
| | - Tomomi Nagayama
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Akiko Chishaki
- Division of Cardiology, Fukuoka Dental College Hospital, Tamura, Sawara-ku, Fukuoka, Japan
| | - Hiroyuki Tsutsui
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, Japan
| |
Collapse
|
7
|
Chieng D, Sugumar H, Ling LH, Segan L, Azzopardi S, Prabhu S, Al-Kaisey A, Voskoboinik A, Parameswaran R, Morton JB, Pathik B, McLellan AJ, Lee G, Wong M, Finch S, Pathak RK, Raja DC, Sanders P, Sterns L, Ginks M, Reid CM, Kalman JM, Kistler PM. Catheter ablation for persistent atrial fibrillation: A multicenter randomized trial of pulmonary vein isolation (PVI) versus PVI with posterior left atrial wall isolation (PWI) - The CAPLA study. Am Heart J 2022; 243:210-220. [PMID: 34619143 DOI: 10.1016/j.ahj.2021.09.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 09/28/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND The success of pulmonary vein isolation (PVI) is reduced in persistent AF (PsAF) compared to paroxysmal AF. Adjunctive ablation strategies have failed to show consistent incremental benefit over PVI alone in randomized studies. The left atrial posterior wall is a potential source of non-PV triggers and atrial substrate which may promote the initiation and maintenance of PsAF. Adding posterior wall isolation (PWI) to PVI had shown conflicting outcomes, with earlier studies confounded by methodological limitations. OBJECTIVES To determine whether combining PWI with PVI significantly improves freedom from AF recurrence, compared to PVI alone, in patients with PsAF. METHODS This is a multi-center, prospective, international randomized clinical trial. 338 patients with symptomatic PsAF refractory to anti-arrhythmic therapy (AAD) will be randomized to either PVI alone or PVI with PWI in a 1:1 ratio. PVI involves wide antral circumferential pulmonary vein (PV) isolation, utilizing contact force sensing ablation catheters. PWI involves the creation of a floor line connecting the inferior aspect of the PVs, and a roof line connecting the superior aspect of the PVs. Follow up is for a minimum of 12 months with rhythm monitoring via implantable cardiac device and/or loop monitor, or frequent intermittent monitoring with an ECG device. The primary outcome is freedom from any documented atrial arrhythmia of > 30 seconds off AAD at 12 months, after a single ablation procedure. CONCLUSIONS This randomized study aims to determine the success and safety of adjunctive PWI to PVI in patients with persistent AF.
Collapse
Affiliation(s)
- David Chieng
- The Baker Heart and Diabetes Research Institute, Melbourne, Australia; The Alfred Hospital, Melbourne, Australia,; University of Melbourne, Melbourne, Australia; Cabrini Hospital, Melbourne, Australia
| | - Hariharan Sugumar
- The Baker Heart and Diabetes Research Institute, Melbourne, Australia; The Alfred Hospital, Melbourne, Australia,; University of Melbourne, Melbourne, Australia; Cabrini Hospital, Melbourne, Australia
| | - Liang-Han Ling
- The Baker Heart and Diabetes Research Institute, Melbourne, Australia; The Alfred Hospital, Melbourne, Australia,; University of Melbourne, Melbourne, Australia; St Vincent's Private Hospital Fitzroy, Melbourne Australia
| | - Louise Segan
- The Baker Heart and Diabetes Research Institute, Melbourne, Australia; The Alfred Hospital, Melbourne, Australia,; University of Melbourne, Melbourne, Australia; Cabrini Hospital, Melbourne, Australia
| | - Sonia Azzopardi
- The Baker Heart and Diabetes Research Institute, Melbourne, Australia; The Alfred Hospital, Melbourne, Australia
| | - Sandeep Prabhu
- The Baker Heart and Diabetes Research Institute, Melbourne, Australia; The Alfred Hospital, Melbourne, Australia,; University of Melbourne, Melbourne, Australia; Mulgrave Private Hospital, Melbourne, Australia
| | - Ahmed Al-Kaisey
- University of Melbourne, Melbourne, Australia; Royal Melbourne Hospital, Melbourne, Australia
| | - Aleksandr Voskoboinik
- The Baker Heart and Diabetes Research Institute, Melbourne, Australia; The Alfred Hospital, Melbourne, Australia,; University of Melbourne, Melbourne, Australia; Cabrini Hospital, Melbourne, Australia
| | - Ramanathan Parameswaran
- University of Melbourne, Melbourne, Australia; Royal Melbourne Hospital, Melbourne, Australia
| | - Joseph B Morton
- University of Melbourne, Melbourne, Australia; Royal Melbourne Hospital, Melbourne, Australia
| | - Bhupesh Pathik
- University of Melbourne, Melbourne, Australia; Royal Melbourne Hospital, Melbourne, Australia
| | - Alex J McLellan
- University of Melbourne, Melbourne, Australia; Royal Melbourne Hospital, Melbourne, Australia; St Vincent's Private Hospital Fitzroy, Melbourne Australia
| | - Geoffrey Lee
- University of Melbourne, Melbourne, Australia; Royal Melbourne Hospital, Melbourne, Australia
| | - Michael Wong
- University of Melbourne, Melbourne, Australia; Royal Melbourne Hospital, Melbourne, Australia; Epworth Hospital Richmond, Melbourne, Australia
| | - Sue Finch
- University of Melbourne, Melbourne, Australia
| | - Rajeev K Pathak
- Canberra Hospital, ACT, Australia; Australian National University, ACT, Australia
| | - Deep Chandh Raja
- Canberra Hospital, ACT, Australia; Australian National University, ACT, Australia
| | | | - Laurence Sterns
- Royal Jubilee Hospital, Vancouver Island, British Columbia, Canada
| | | | - Christopher M Reid
- Monash University, Melbourne, Australia; Curtin University, Perth, Australia
| | - Jonathan M Kalman
- University of Melbourne, Melbourne, Australia; Monash University, Melbourne, Australia; Royal Melbourne Hospital, Melbourne, Australia
| | - Peter M Kistler
- The Baker Heart and Diabetes Research Institute, Melbourne, Australia; The Alfred Hospital, Melbourne, Australia,; University of Melbourne, Melbourne, Australia; Cabrini Hospital, Melbourne, Australia; Monash University, Melbourne, Australia; Melbourne Private Hospital, Melbourne, Australia.
| |
Collapse
|
8
|
Guo R, Jia R, Cen Z, Lu S, Yang C, Han S, Li D, Cui K. Effects of the visualized steerable sheath applied to catheter ablation of paroxysmal atrial fibrillation. J Interv Card Electrophysiol 2021; 64:511-518. [PMID: 34850310 DOI: 10.1007/s10840-021-01096-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 11/17/2021] [Indexed: 02/05/2023]
Abstract
PURPOSE A new type of visualized steerable sheath (Vizigo sheath; Biosense Webster Inc., Irvine, CA, USA) has been employed in clinical treatment. This study aimed to compare the effectiveness and safety of the Vizigo sheath to a fixed sheath (Swartz sheath; St. Jude Inc., St. Paul, MN, USA) for catheter ablation of paroxysmal atrial fibrillation (PAF). METHODS We analyzed the procedural time, fluoroscopy time, contact force (CF), and initial pulmonary vein isolation (PVI) rate. After 6 months of follow-up, the success rate of ablation between the two groups was compared. RESULTS Compared to the Swartz sheath, using the Vizigo sheath can significantly reduce the total procedural time and fluoroscopy time and increase the overall average CF, especially in the anterior left pulmonary vein (LPV), superior LPV, posterior right pulmonary vein (RPV), and superior RPV. The proportion of CF within a reasonable range in the Vizigo group was significantly higher than that in the Swartz group, especially in the anterior LPV, posterior RPV, and superior RPV. Besides, the left, right, and bilateral initial PVI rates in the Vizigo group were significantly higher. CONCLUSIONS The visualized steerable sheath for PAF catheter ablation not only reduced radiation exposure but also significantly improved CF and initial PVI rate, all of which indicated an increased rate of successful ablation.
Collapse
Affiliation(s)
- Ran Guo
- West China Hospital, (Department of Cardiology), Sichuan University, Chengdu, 610041, People's Republic of China
| | - Ruikun Jia
- West China Hospital, (Department of Cardiology), Sichuan University, Chengdu, 610041, People's Republic of China
| | - Zhifu Cen
- West China Hospital, (Department of Cardiology), Sichuan University, Chengdu, 610041, People's Republic of China
| | - Sijie Lu
- West China Hospital, (Department of Cardiology), Sichuan University, Chengdu, 610041, People's Republic of China
| | - Chao Yang
- West China Hospital, (Department of Cardiology), Sichuan University, Chengdu, 610041, People's Republic of China
| | - Shaojie Han
- West China Hospital, (Department of Cardiology), Sichuan University, Chengdu, 610041, People's Republic of China
| | - Dong Li
- Mianyang Central Hospital, (Department of Cardiology), University of Electronic Science and Technology of China, Mianyang, 621000, People's Republic of China.
| | - Kaijun Cui
- West China Hospital, (Department of Cardiology), Sichuan University, Chengdu, 610041, People's Republic of China.
| |
Collapse
|
9
|
Comparison of lesion characteristics between conventional and high-power short-duration ablation using contact force-sensing catheter in patients with paroxysmal atrial fibrillation. BMC Cardiovasc Disord 2021; 21:387. [PMID: 34372779 PMCID: PMC8353766 DOI: 10.1186/s12872-021-02196-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 07/28/2021] [Indexed: 01/05/2023] Open
Abstract
Background Transmural lesion creation is essential for effective atrial fibrillation (AF) ablation. Lesion characteristics between conventional energy and high-power short-duration (HPSD) setting in contact force-guided (CF) ablation for AF remained unclear.
Methods Eighty consecutive AF patients who received CF with conventional energy setting (power control: 25–30 W, force–time integral = 400 g s, n = 40) or with HPSD (power control: 40–50 W, 10 s, n = 40) ablation were analyzed. Of them, 15 patients in each conventional and HPSD group were matched by age and gender respectively for ablation lesions analysis. Type A and B lesions were defined as a lesion with and without significant voltage reduction after ablation, respectively. The anatomical distribution of these lesions and ablation outcomes among the 2 groups were analyzed.
Results 1615 and 1724 ablation lesions were analyzed in the conventional and HPSD groups, respectively. HPSD group had a higher proportion of type A lesion compared to conventional group (P < 0.01). In the conventional group, most type A lesions were at the right pulmonary vein (RPV) posterior wall (50.2%) whereas in the HPSD group, most type A lesions were at the RPV anterior wall (44.0%) (P = 0.04). The procedure time and ablation time were significantly shorter in the HPSD group than that in the conventional group (91.0 ± 12.1 vs. 124 ± 14.2 min, P = 0.03; 30.7 ± 19.2 vs. 57.8 ± 21 min, P = 0.02, respectively). At a mean follow-up period of 11 ± 1.4 months, there were 13 and 7 patients with recurrence in conventional and HPSD group respectively (P = 0.03). Conclusion Optimal ablation lesion characteristics and distribution after conventional and HPSD ablation differed significantly. HPSD ablation had shorter ablation time and lower recurrence rate than did conventional ablation.
Collapse
|
10
|
Inoue K, Hikoso S, Masuda M, Furukawa Y, Hirata A, Egami Y, Watanabe T, Minamiguchi H, Miyoshi M, Tanaka N, Oka T, Okada M, Kanda T, Matsuda Y, Kawasaki M, Hayashi K, Kitamura T, Dohi T, Sunaga A, Mizuno H, Nakatani D, Sakata Y. Pulmonary vein isolation alone vs. more extensive ablation with defragmentation and linear ablation of persistent atrial fibrillation: the EARNEST-PVI trial. Europace 2021; 23:565-574. [PMID: 33200213 DOI: 10.1093/europace/euaa293] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 09/12/2020] [Indexed: 11/14/2022] Open
Abstract
AIMS Previous studies could not demonstrate any benefit of more intensive ablation in addition to pulmonary vein isolation (PVI) including complex fractionated atrial electrogram (CFAE) and linear ablation for recurrence in the initial catheter ablation of persistent atrial fibrillation (AF). This study aimed to establish the non-inferiority of PVI alone to PVI plus these additional ablation strategies. METHODS AND RESULTS Patients with persistent AF who underwent an initial catheter ablation (n = 512, long-standing persistent AF; 128 cases) were randomly assigned in a 1:1 ratio to either PVI alone (PVI-alone group) or PVI plus CFAE and/or linear ablation (PVI-plus group). After excluding 15 cases who did not receive procedures, we analysed 249 and 248 patients, respectively. The primary endpoint was recurrence of AF, atrial flutter, and/or atrial tachycardia, and the non-inferior margin was set at a hazard ratio of 1.43. In the PVI-plus group, 85.1% of patients had linear ablation and 15.3% CFAE ablation. After 12 months, freedom from the primary endpoint occurred in 71.3% of patients in the PVI-alone group and in 78.3% in the PVI-plus group [hazard ratio = 1.56 (95% confidence interval: 1.10-2.24), non-inferior P = 0.3062]. The procedure-related complication rates were 2.0% in the PVI-alone group and 3.6% in the PVI-plus group (P = 0.199). CONCLUSION This randomized trial did not establish the non-inferiority of PVI alone to PVI plus linear ablation or CFAE ablation in patients with persistent AF, but implied that the PVI plus strategy was promising to improve the clinical efficacy (NCT03514693).
Collapse
Affiliation(s)
- Koichi Inoue
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Shungo Hikoso
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Masaharu Masuda
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yoshio Furukawa
- Cardiovascular Center, Kansai Rosai Hospital, Amagasaki, Japan
| | - Akio Hirata
- Division of Cardiology, Osaka General Medical Center, Osaka, Japan
| | - Yasuyuki Egami
- Cardiovascular Division, Osaka Police Hospital, Osaka, Japan
| | | | - Hitoshi Minamiguchi
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Miwa Miyoshi
- Department of Cardiovascular Medicine, Yao Municipal Hospital, Yao, Japan
| | - Nobuaki Tanaka
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Takafumi Oka
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Masato Okada
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Takashi Kanda
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yasuhiro Matsuda
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Masato Kawasaki
- Cardiovascular Center, Kansai Rosai Hospital, Amagasaki, Japan
| | - Kenichi Hayashi
- Department of Cardiology, Osaka Hospital, Japan Community Healthcare Organization, Osaka, Japan
| | - Tetsuhisa Kitamura
- Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Tomoharu Dohi
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Akihiro Sunaga
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Hiroya Mizuno
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Daisaku Nakatani
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | - Yasushi Sakata
- Cardiovascular Center, Sakurabashi-Watanabe Hospital, 2-4-32 Umeda, Kita-ku, Osaka 530-0001, Japan
| | | |
Collapse
|
11
|
Conduction Disorders during Sinus Rhythm in Relation to Atrial Fibrillation Persistence. J Clin Med 2021; 10:jcm10132846. [PMID: 34199081 PMCID: PMC8269325 DOI: 10.3390/jcm10132846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/25/2021] [Accepted: 06/24/2021] [Indexed: 12/04/2022] Open
Abstract
Classification of atrial fibrillation (AF) is currently based on clinical characteristics. However, classifying AF using an objective electrophysiological parameter would be more desirable. The aim of this study was to quantify parameters of atrial conduction during sinus rhythm (SR) using an intra-operative high-resolution epicardial mapping approach and to relate these parameters to clinical classifications of AF. Patients were divided according to the standard clinical classification and spontaneous termination of AF episodes. The HATCH score, a score predictive of AF progression, was calculated, and surface ECGs were evaluated for signs of interatrial block. Conduction disorders mainly differed at Bachmann’s bundle (BB). Activation time (AT) at BB was longer in persistent AF patients (AT-BB: 75 (53–92) ms vs. 55 (40–76) ms, p = 0.017), patients without spontaneous termination of AF episodes (AT-BB: 53.5 (39.6–75.8) ms vs. 72.0 (49.6–80.8) ms, p = 0.009) and in patients with a P-wave duration ≥ 120 ms (64.3 (52.3–93.0) ms vs. 50.5 (39.6–56.6) ms, p = 0.014). HATCH scores also correlated positively to AT-BB (rho 0.326, p = 0.029). However, discriminatory values of electrophysiological parameters, as calculated using ROC-curves, were limited. These results may reflect shortcomings of clinical classifications and further research is needed to establish an objective substrate-based classification of AF.
Collapse
|
12
|
Kistler PM, Chieng D. Persistent atrial fibrillation in the setting of pulmonary vein isolation-Where to next? J Cardiovasc Electrophysiol 2019; 31:1857-1860. [PMID: 31778259 DOI: 10.1111/jce.14298] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 11/07/2019] [Indexed: 01/07/2023]
Abstract
Catheter ablation for atrial fibrillation (AF) is indicated in symptomatic patients who are intolerant or refractory to antiarrhythmic therapy. However, outcomes from catheter ablation remain suboptimal in patients with persistent AF. Pulmonary vein antral isolation (PVAI) is established as the cornerstone of AF ablation strategies. The landmark STAR AF II study demonstrated a lack of incremental benefit with adjunctive linear and complex fractionated electrogram ablation beyond PVAI. Randomized studies thus far have failed to consistently show favorable outcomes from other trigger/substrate-based ablation approaches over PVAI alone. In this issue of the journal, we pose an interesting clinical scenario-of a middle-aged female who presents with recurrent persistent AF but was found to have enduring PVAI on repeat electrophysiologic study. Which approach should be undertaken next? In this review article, we aim to provide an overview of ablation strategies beyond PVAI. Finally in light of scant randomized data to guide decision making we have approached leading experts in the field to provide their approach to this scenario.
Collapse
Affiliation(s)
- Peter M Kistler
- Department of Cardiology, Alfred Hospital, Melbourne, Victoria, Australia.,Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,University of Melbourne, Melbourne, Victoria, Australia.,Monash University, Melbourne, Victoria, Australia
| | - David Chieng
- Department of Cardiology, Alfred Hospital, Melbourne, Victoria, Australia.,Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,University of Melbourne, Melbourne, Victoria, Australia
| |
Collapse
|