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Sano M, Yamaji H, Higashiya S, Kubo M, Murakami T, Kawamura H, Murakami M, Kamikawa S, Hirohata S, Kusachi S. Efficacy and safety of a novel temperature-controlled catheter for cavotricuspid isthmus ablation. J Cardiovasc Electrophysiol 2024. [PMID: 39049491 DOI: 10.1111/jce.16378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 07/03/2024] [Accepted: 07/16/2024] [Indexed: 07/27/2024]
Abstract
BACKGROUND Maintaining an adequate temperature at the target site is essential for effective ablation. We hypothesized that a tissue temperature-controlled (T-Con) catheter for cavotricuspid isthmus (CTI) ablation could improve the procedural ablation parameters. PURPOSE To evaluate the efficacy and safety of the T-Con (DiamondTemp™) catheter for CTI ablation compared with non-irrigation (Non-Irri) and irrigation (Irri) catheters. METHODS We analyzed 150 patients who underwent prophylactic CTI ablation combined with pulmonary vein isolation. The Non-Irri, Irri, and T-Con catheter groups comprised 50 patients each, and the ablation procedural parameters and complications were compared between these groups. RESULTS There were no significant differences in clinical background characteristics among the three groups. The Kruskal-Wallis and post hoc tests demonstrated that the T-Con group showed the lowest total radiofrequency energy delivery time among the three groups (median [25 and 75 percentiles]: 340 [209, 357], 147 [100, 199], and 83 [61, 109] s, respectively in the Non-Irri, Irri, and T-Con groups; T-Con versus Non-Irri, p < .01; T-Con versus Irri, p < .01). The total procedural time and acute reconnection rate in the T-Con group (264 s and 4%, respectively) were lower than those in the Non-Irri group (438 s and 24%) but were similar to those in the Irri group (268 s and 6%). No significant complications were observed in any group. CONCLUSIONS The T-Con catheter achieved a short energy delivery time and a low acute reconnection rate, indicating its potential as an alternative catheter for CTI ablation.
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Affiliation(s)
- Masaya Sano
- Heart Rhythm Center, Okayama Heart Clinic, Naka-Ku, Okayama, Japan
| | - Hirosuke Yamaji
- Heart Rhythm Center, Okayama Heart Clinic, Naka-Ku, Okayama, Japan
| | | | - Motoki Kubo
- Heart Rhythm Center, Okayama Heart Clinic, Naka-Ku, Okayama, Japan
| | - Takashi Murakami
- Heart Rhythm Center, Okayama Heart Clinic, Naka-Ku, Okayama, Japan
| | - Hiroshi Kawamura
- Department of Cardiology, Okayama Heart Clinic, Naka-Ku, Okayama, Japan
| | - Masaaki Murakami
- Department of Cardiology, Okayama Heart Clinic, Naka-Ku, Okayama, Japan
| | - Shigeshi Kamikawa
- Department of Cardiology, Okayama Heart Clinic, Naka-Ku, Okayama, Japan
| | - Satoshi Hirohata
- Department of Medical Technology, Okayama University Graduate School of Health Okayama, Japan Sciences, Kita-ku, Okayama, Japan
| | - Shozo Kusachi
- Heart Rhythm Center, Okayama Heart Clinic, Naka-Ku, Okayama, Japan
- Department of Medical Technology, Okayama University Graduate School of Health Okayama, Japan Sciences, Kita-ku, Okayama, Japan
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Jilek C, Gleirscher L, Strzelczyk E, Sepela D, Tiemann K, Lewalter T. [Isthmus-dependent right atrial flutter : Clinical course after isthmus ablation]. Herzschrittmacherther Elektrophysiol 2023; 34:291-297. [PMID: 37847416 DOI: 10.1007/s00399-023-00966-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 09/25/2023] [Indexed: 10/18/2023]
Abstract
Ablation of the cavotricuspid isthmus (CTI) to create bidirectional isthmus blockade is the most effective way to achieve rhythm control in typical atrial flutter. Compared with drug therapy, ablation reduces cardiovascular mortality, all-cause mortality, stroke risk, and the risk of cardiac decompensation. Concomitant arrhythmia of atrial flutter is atrial fibrillation (AF); therefore the duration of oral anticoagulation should be adapted according to the risk of stroke and bleeding. A combined procedure of CTI ablation and pulmonary vein isolation (PVI) in patients with typical atrial flutter but without evidence of AF should be evaluated individually especially in patients aged > 54 years depending on (cardiac) comorbidities. The comprehensive diagnostic view should keep in mind not only arrhythmias but also possibly underlying coronary artery disease.
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Affiliation(s)
- Clemens Jilek
- Peter-Osypka Herzzentrum München, Internistisches Klinikum München Süd, Am Isarkanal 36, 81379, München, Deutschland.
| | - Lukas Gleirscher
- Peter-Osypka Herzzentrum München, Internistisches Klinikum München Süd, Am Isarkanal 36, 81379, München, Deutschland
| | - Elmar Strzelczyk
- Peter-Osypka Herzzentrum München, Internistisches Klinikum München Süd, Am Isarkanal 36, 81379, München, Deutschland
| | - Dominik Sepela
- Peter-Osypka Herzzentrum München, Internistisches Klinikum München Süd, Am Isarkanal 36, 81379, München, Deutschland
| | - Klaus Tiemann
- Peter-Osypka Herzzentrum München, Internistisches Klinikum München Süd, Am Isarkanal 36, 81379, München, Deutschland
| | - Thorsten Lewalter
- Peter-Osypka Herzzentrum München, Internistisches Klinikum München Süd, Am Isarkanal 36, 81379, München, Deutschland
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Van Steenkiste G, Boussy T, Duytschaever M, Vernemmen I, Schauvlieghe S, Decloedt A, van Loon G. Detection of the origin of atrial tachycardia by 3D electro-anatomical mapping and treatment by radiofrequency catheter ablation in horses. J Vet Intern Med 2022; 36:1481-1490. [PMID: 35686355 PMCID: PMC9308432 DOI: 10.1111/jvim.16473] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 05/27/2022] [Indexed: 11/30/2022] Open
Abstract
Background Atrial tachycardia (AT) can be treated by medical or electrical cardioversion but the recurrence rate is high. Three‐dimensional electro‐anatomical mapping, recently described in horses, might be used to map AT to identify a focal source or reentry mechanism and to guide treatment by radiofrequency ablation. Objectives To describe the feasibility of 3D electro‐anatomical mapping and radiofrequency catheter ablation to characterize and treat sustained AT in horses. Animals Nine horses with sustained AT. Methods Records from horses with sustained AT referred for radiofrequency ablation at Ghent University were reviewed. Results The AT was drug resistant in 4 out of 9 horses. In 8 out of 9 horses, AT originated from a localized macro‐reentrant circuit (n = 5) or a focal source (n = 3) located at the transition between the right atrium and the caudal vena cava. In these 8 horses, local radiofrequency catheter ablation resulted in the termination of AT. At follow‐up, 6 out of 8 horses remained free of recurrence. Conclusions and Clinical Importance Differentiation between focal and macro‐reentrant AT in horses is possible using 3D electro‐anatomical mapping. In this study, the source of right atrial AT in horses was safely treated by radiofrequency catheter ablation.
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Affiliation(s)
- Glenn Van Steenkiste
- Equine Cardioteam Ghent University, Department of Large Animal Internal Medicine, Ghent University, Merelbeke, Belgium
| | - Tim Boussy
- Department of Cardiology, AZ Groeninge, Kortrijk, Belgium
| | | | - Ingrid Vernemmen
- Equine Cardioteam Ghent University, Department of Large Animal Internal Medicine, Ghent University, Merelbeke, Belgium
| | - Stijn Schauvlieghe
- Department of Surgery and Anaesthesiology of Domestic Animals, Ghent University, Merelbeke, Belgium
| | - Annelies Decloedt
- Equine Cardioteam Ghent University, Department of Large Animal Internal Medicine, Ghent University, Merelbeke, Belgium
| | - Gunther van Loon
- Equine Cardioteam Ghent University, Department of Large Animal Internal Medicine, Ghent University, Merelbeke, Belgium
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Yamaji H, Higashiya S, Murakami T, Kawamura H, Murakami M, Kamikawa S, Kusachi S. Rates of atrial flutter occurrence and cavotricuspid isthmus reconduction after prophylactic isthmus ablation performed during atrial fibrillation ablation: a clinical study, review, and comparison with previous findings. J Interv Card Electrophysiol 2021; 64:67-76. [PMID: 34755243 DOI: 10.1007/s10840-021-01087-8] [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: 08/28/2021] [Accepted: 11/04/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE Based on the high rate of coexisting atrial fibrillation (AF) and atrial flutter (AFL), prophylactic cavotricuspid isthmus ablation (CTIA) adjunctive to AF ablation has recently been attempted in patients with AF and without AFL. The present study aimed to determine the rates of AFL occurrence and CTI reconduction after performing CTI ablation adjunctive to AF ablation. METHODS We analyzed the data of 3833 consecutive patients with AF, who underwent prophylactic CTIA with AF ablation between 2009 and 2020. RESULTS In all patients, CTIA and AF ablations were successful. Clinical AFL occurred in seven patients (0.18%, 7/3,833), and the observed rate was lower than those reported for cases of AF ablation without CTIA and for those of CTIA for pure AFL. A second ablation was needed in 745 patients at a median of 253 days (25 and 75 percentiles, 116 and 775 days) after the first ablation. In 12.1% (90/745) of the patients, CTI reconduction was observed. The reconduction rate was lower than that previously reported for CTIA for pure AFL. CONCLUSIONS The present retrospective study found acceptably low rates of clinical AFL occurrence and CTI reconduction following prophylactic CTIA performed with AF ablation, which was supported by the findings obtained after performing a comparison of the rates with those of other ablations (AF ablation only and CTIA for pure AFL). Considering the high correlation between AF and AFL, the present study provided information regarding the efficacy of adjunctive CTIA.
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Affiliation(s)
- Hirosuke Yamaji
- Heart Rhythm Center, Okayama Heart Clinic, Takeda 54-1, Naka-Ku, Okayama, 703-8251, Japan.
| | - Shunichi Higashiya
- Heart Rhythm Center, Okayama Heart Clinic, Takeda 54-1, Naka-Ku, Okayama, 703-8251, Japan
| | - Takashi Murakami
- Heart Rhythm Center, Okayama Heart Clinic, Takeda 54-1, Naka-Ku, Okayama, 703-8251, Japan
| | - Hiroshi Kawamura
- Heart Rhythm Center, Okayama Heart Clinic, Takeda 54-1, Naka-Ku, Okayama, 703-8251, Japan
| | - Masaaki Murakami
- Heart Rhythm Center, Okayama Heart Clinic, Takeda 54-1, Naka-Ku, Okayama, 703-8251, Japan
| | - Shigeshi Kamikawa
- Heart Rhythm Center, Okayama Heart Clinic, Takeda 54-1, Naka-Ku, Okayama, 703-8251, Japan
| | - Shozo Kusachi
- Department of Medical Technology, Okayama University Graduate School of Health Okayama, Japan Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
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Kakehashi S, Miyazaki S, Hasegawa K, Nodera M, Mukai M, Aoyama D, Nagao M, Sekihara T, Eguchi T, Yamaguchi J, Shiomi Y, Tama N, Ikeda H, Ishida K, Uzui H, Tada H. Safety and durability of cavo-tricuspid isthmus linear ablation in the current era: Single-center 9-year experience from 1078 procedures. J Cardiovasc Electrophysiol 2021; 33:40-45. [PMID: 34676946 DOI: 10.1111/jce.15281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/17/2021] [Accepted: 08/31/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND Cavo-tricuspid isthmus (CTI) linear ablation is performed not only for atrial flutter (AFL) but empirically during atrial fibrillation (AF) ablation in real-world practice. PURPOSE: We sought to evaluate the safety and durability of the CTI ablation. METHODS: This retrospective study included 1078 consecutive patients who underwent a CTI ablation. AFL was documented before or during the procedure in 249 (23.1%) patients, and an empirical CTI and AF ablation were performed in 829 (76.9%) patients. RESULTS: CTI block was successfully created in 1051 (97.5%) patients with a 10.3 ± 6.6 min total radiofrequency time. Repeat procedures were performed for recurrent arrhythmias in 187 (17.3%) patients at a median of 11.0 (5.0-30.0) months postprocedure, and conduction resumption was identified in 68/174 (39.1%). Among those undergoing a CTI ablation with an AF ablation, the durability was significantly higher in those with than without documented AFL (78.1% vs. 58.2%, p = .031). The total radiofrequency time was significantly shorter (9.0 ± 5.3 vs. 10.0 ± 6.4 [mins], p = .024) and durability significantly higher (78.1 vs. 58.7[%], p = .043) in the large-tip than irrigated-tip catheter group. Iatrogenic AFL was observed after the empiric CTI ablation in 11 (1.3%) patients. Procedure-related complications occurred in 15 (1.4%) patients. Eight patients experienced coronary artery spasms, including one with ventricular fibrillation following ST elevation on the ward. The other six patients experienced transient atrioventricular block and one experienced cardiac tamponade requiring drainage. CONCLUSIONS: Despite a high acute CTI ablation success, the conduction block durability was relatively low after the empiric ablation. An empiric CTI ablation at the time of the AF ablation is not recommended.
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Affiliation(s)
- Shota Kakehashi
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Shinsuke Miyazaki
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Kanae Hasegawa
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Minoru Nodera
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Moe Mukai
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Daisetsu Aoyama
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Moeko Nagao
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Takayuki Sekihara
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Tomoya Eguchi
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Junya Yamaguchi
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Yuichiro Shiomi
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Naoto Tama
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Hiroyuki Ikeda
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Kentaro Ishida
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Hiroyasu Uzui
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Hiroshi Tada
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
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Klaver MN, De Potter TJR, Iliodromitis K, Babkin A, Cabrita D, Fabbricatore D, Boersma LVA. Ultralow temperature cryoablation using near-critical nitrogen for cavotricuspid isthmus-ablation, first-in-human results. J Cardiovasc Electrophysiol 2021; 32:2025-2032. [PMID: 34196991 PMCID: PMC8457224 DOI: 10.1111/jce.15142] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 05/29/2021] [Accepted: 06/02/2021] [Indexed: 11/30/2022]
Abstract
Introduction Cryoablation has evolved as a safe alternative to radiofrequency ablation in the treatment of several supraventricular arrhythmias and has potential advantages, yet is limited by the properties of the cryogen used. We investigated a novel ultralow temperature cryoablation (ULTC) system using nitrogen near its liquid‐vapor critical point as a freezing source, achieving temperatures as low as ‐196 degrees Celsius in a long linear catheter with a continuous energy release. Initial safety, procedural and efficacy outcomes of ULTC are described in patients undergoing cavotricuspid isthmus (CTI) ablation. Methods and Results The Cryocure studies (NCT02355106, NCT02839304) are prospective, single‐arm, multi‐center, first‐in‐human clinical studies in 17 patients with atrial flutter (AFL) and 13 patients with atrial fibrillation (AF). A total of 30 patients, mean age 65 ± 8 years old and 67% male, were enrolled and underwent ablation of the CTI. Acute success, defined as the confirmation of stable bidirectional conduction block across the CTI, was achieved in all 30 patients. After 12 months of follow‐up, 14 out of 17 AFL patients remained free from any AFL. One (3.3%) procedure‐related but not device‐related serious adverse event was reported, involving transient inferolateral ST‐elevation associated with temporary AV conduction block. Conclusion In this first‐in‐human clinical study the safety and performance results demonstrate the capabilities of ultralow temperature near‐critical nitrogen as an effective energy source for CTI ablation. Ongoing, larger, studies should confirm our findings and evaluate the capabilities to create linear and focal transmural lesions in other arrhythmias.
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Affiliation(s)
- Martijn N Klaver
- Department of Cardiology, St. Antonius Hospital, Nieuwegein, The Netherlands.,Department of Cardiology, Amsterdam University Medical Centers, The Netherlands
| | - Tom J R De Potter
- Department of Cardiology, Onze-Lieve-Vrouw Ziekenhuis, Aalst, Belgium
| | | | | | | | | | - Lucas V A Boersma
- Department of Cardiology, St. Antonius Hospital, Nieuwegein, The Netherlands.,Department of Cardiology, Amsterdam University Medical Centers, The Netherlands
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Yoneda ZT, Shoemaker MB, Richardson T, Crawford D, Kanagasundram A, Shen S, Estrada JC, Holmes B, Lugo R, McHugh J, Saavedra P, Crossley G, Ellis CR, Montgomery JA, Michaud GF. Conduction Recovery After Cavotricuspid Isthmus Ablation When Performed With or Without Concomitant Atrial Fibrillation Ablation. JACC Clin Electrophysiol 2020; 6:989-996. [PMID: 32819535 DOI: 10.1016/j.jacep.2020.04.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 03/24/2020] [Accepted: 04/22/2020] [Indexed: 11/16/2022]
Abstract
OBJECTIVES This study sought to define the association between conduction recovery across the cavotricuspid isthmus (CTI) and typical atrial flutter (AFL) recurrence when CTI ablation is performed with pulmonary vein isolation (PVI) compared with a stand-alone procedure. BACKGROUND CTI ablation is commonly performed at the same time as PVI to treat AFL or as an empiric therapy. Conduction recovery is a recognized problem after linear ablation in the left atrium (e.g., mitral isthmus ablation) and is proarrhythmic. Less is known about conduction recovery after CTI ablation and possible differences in outcomes when performed at the time of PVI compared with at the time of a stand-alone procedure. METHODS Eligible participants who underwent stand-alone CTI ablation were compared with those who underwent a combined (CTI+PVI) procedure. CTI conduction recovery was assessed at the time of a second ablation. Conduction recovery across the CTI (primary outcome) and recurrence of typical AFL (secondary outcome) were studied using multivariable logistic regression. RESULTS Among 295 eligible participants (median age: 64 years [interquartile range: 55 to 69 years]; 33% women), recovery was assessed in 232 and was more common after combined versus stand-alone CTI ablation (52% [72 of 139] vs. 13% [12 of 93]; p < 0.001). In multivariable analysis, CTI ablation performed as a combined procedure increased odds of CTI conduction recovery 7.8-fold (odds ratio: 7.8; 95% confidence interval: 3.3 to 18.3; p < 0.001) and clinical AFL recurrence 4.1-fold (odds ratio: 4.1; 95% confidence interval: 1.0 to 16.9; p = 0.049). CONCLUSIONS CTI ablation performed at the time of atrial fibrillation ablation is associated with higher rates of conduction recovery and typical flutter recurrence.
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Affiliation(s)
- Zachary T Yoneda
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M Benjamin Shoemaker
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Travis Richardson
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Diane Crawford
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Arvindh Kanagasundram
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Sharon Shen
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Juan Carlos Estrada
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Benjamin Holmes
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Ricardo Lugo
- Department of Cardiology, Ascension Saint Thomas West, Nashville, Tennessee, USA
| | - Julia McHugh
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Pablo Saavedra
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - George Crossley
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Christopher R Ellis
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Jay A Montgomery
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Gregory F Michaud
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
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Sadek MM, Nair GM. Evaluating a Prior Cavotricuspid Isthmus Ablation Line at the Time of Atrial Fibrillation Ablation: Another Weak Link in the Chain! JACC Clin Electrophysiol 2020; 6:997-998. [PMID: 32819536 DOI: 10.1016/j.jacep.2020.05.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 05/26/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Mouhannad M Sadek
- Arrhythmia Service, Division of Cardiology, Department of Medicine, University of Ottawa Heart Institute, Ottawa, Ontario, Canada.
| | - Girish M Nair
- Arrhythmia Service, Division of Cardiology, Department of Medicine, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
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Evaluation of myocardial injury induced by different ablation approaches (radiofrequency ablation versus cryoablation) in atrial flutter patients: a meta-analysis. Biosci Rep 2019; 39:BSR20182251. [PMID: 31076543 PMCID: PMC6533206 DOI: 10.1042/bsr20182251] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 04/12/2019] [Accepted: 05/08/2019] [Indexed: 11/28/2022] Open
Abstract
Background: To evaluate myocardial injury in Atrial flutter (AFL) patients undergoing Radiofrequency ablation (RF) and cryoablation (CRYO) treatments. Methods: We conducted a systematic search on PubMed, Embase, Cochrane Library, and CBM databases. All relevant clinical trials (up to October 2018) on myocardial injury in AFL patients were retrieved and subsequent results analyzed with a random-effects model or a fixed-effects model. Results: A total of eight clinical trials with a sample size of 644 patients, were identified and incorporated in the present study. The results indicated no significant differences in creatine kinase (CK) levels (mean difference (MD) = 62.74, P=0.46; 4–6 h and MD = 30.73, P=0.49; 12–24 h after ablation), creatine kinase MB(CK-MB) levels (MD = 17.32, P=0.25; 12–24 h post-ablation), troponinI (TnI) levels (MD = 0.12, P=0.08; 6 h after ablation), and troponin T (TnT) levels (MD = 0.30, P=0.08; 4–6 h post-ablation) between the two treatment approaches. However, patients receiving CRYO xhibited higher levels of CK (MD = 179.54, P=0.04; tested immediately after the procedure), CK-MB (MD = 10.08, P=0.004) 4–6 h after ablation, and TnT (MD = 0.19, P=0.002) tested the next morning. Moreover, those patients had a significantly reduced pain perception (odds ratio (OR) = 0.05, P=0.04) compared with those in the RF group. Conclusion: These results indicate that CRYO in comparison with RF significantly increases myocardial injury in AFL patients. Additionally, it decreases pain perception during the procedure. Further large-sampled studies are needed to support these findings.
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Abstract
Clinical electrophysiology has made the traditional classification of rapid atrial rhythms into flutter and tachycardia of little clinical use. Electrophysiological studies have defined multiple mechanisms of tachycardia, both re-entrant and focal, with varying ECG morphologies and rates, authenticated by the results of catheter ablation of the focal triggers or critical isthmuses of re-entry circuits. In patients without a history of heart disease, cardiac surgery or catheter ablation, typical flutter ECG remains predictive of a right atrial re-entry circuit dependent on the inferior vena cava-tricuspid isthmus that can be very effectively treated by ablation, although late incidence of atrial fibrillation remains a problem. Secondary prevention, based on the treatment of associated atrial fibrillation risk factors, is emerging as a therapeutic option. In patients subjected to cardiac surgery or catheter ablation for the treatment of atrial fibrillation or showing atypical ECG patterns, macro-re-entrant and focal tachycardia mechanisms can be very complex and electrophysiological studies are necessary to guide ablation treatment in poorly tolerated cases.
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Affiliation(s)
- Francisco G Cosío
- Getafe University Hospital, European University of Madrid, Madrid, Spain
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11
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Miyazaki S, Iwasawa J, Taniguchi H, Nakamura H, Hachiya H, Matsuda J, Takagi T, Watanabe T, Hirao K, Iesaka Y. Creating bidirectional conduction block in the cavotricuspid isthmus by cryothermal ablation with a short freeze time: Insight from the results with a 2-minute freeze cycle. Int J Cardiol 2016; 224:149-154. [PMID: 27657464 DOI: 10.1016/j.ijcard.2016.09.064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 09/14/2016] [Accepted: 09/15/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND Optimal freeze doses are unknown during cryothermal cavo-tricuspid isthmus (CTI) ablation. This study aimed to evaluate the feasibility of 2-minute freeze doses for CTI ablation. METHODS Forty-eight consecutive patients undergoing cryothermal CTI ablation following pulmonary vein isolation were enrolled. CTI ablation was performed with 2-minute freeze cycles and 8-mm tip cryocatheters. RESULTS Bidirectional CTI block was successfully achieved in 45(93.8%) patients with a median of 5.0[4.0-6.0] cryocatheter applications. The total procedure and fluoroscopic times were a median of 16.5[13.0-20.0] and 4.0[2.0-5.0]min, respectively. A crossover to radiofrequency was performed in 3 patients including 1 due to coronary spasms during the cryoapplication. The tip temperature when block was achieved was a median of -81.0[-73.3 - -84.0]°C. Application times from the start of the last application to achieving block were significantly longer in patients with acute conduction resumption than in those without (46.8±4.0 vs. 20.2±8.8s, p<0.0001), and the optimal cutoff point for predicting no acute resumption was 38.5s (sensitivity 100%, specificity 99.5%). Vasospastic angina occurred in 2 patients, during the procedure in 1 and after in another. Durability could be evaluated a median of 6.0[3.0-8.0] months after the procedure in 14 patients, and conduction resumption was observed in 8(57.1%). The majority of gaps were located at the inferior vena cava edge. CONCLUSIONS Acute CTI block was obtained by 2-minute freeze cycles with short procedure and fluoroscopic times. Care should be taken to avoid coronary spasms during the peri-procedural period. Additional cryoapplications might be required to improve conduction block durability.
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Affiliation(s)
- Shinsuke Miyazaki
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Tsuchiura, Ibaraki, Japan.
| | - Jin Iwasawa
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Tsuchiura, Ibaraki, Japan
| | - Hiroshi Taniguchi
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Tsuchiura, Ibaraki, Japan
| | - Hiroaki Nakamura
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Tsuchiura, Ibaraki, Japan
| | - Hitoshi Hachiya
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Tsuchiura, Ibaraki, Japan
| | - Junji Matsuda
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Tsuchiura, Ibaraki, Japan
| | - Takamitsu Takagi
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Tsuchiura, Ibaraki, Japan
| | - Tomonori Watanabe
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Tsuchiura, Ibaraki, Japan
| | - Kenzo Hirao
- Heart Rhythm Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshito Iesaka
- Cardiovascular Center, Tsuchiura Kyodo Hospital, Tsuchiura, Ibaraki, Japan
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12
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Rodríguez-Mañero M, Schurmann P, Valderrábano M. Combination of Hansen Robotic system with cryocatheter in a challenging parahisian accessory pathway ablation. Indian Pacing Electrophysiol J 2016; 15:303-4. [PMID: 27479207 PMCID: PMC4867965 DOI: 10.1016/j.ipej.2016.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
A perceived distinctive feature of cryoablation is the stability (cryoadherence) of the catheter tip during cold temperatures at the desired location, even during tachycardia. We report the case report of a young patient with a parahisian accessory pathway where stability of the ablation catheter was not achieved despite using the cryocatheter with a steerable sheath. Ultimately, stability at the desired location was achieved robotically by means of Hansen system (Hansen Medical, Mountain View, CA, USA).
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Affiliation(s)
- Moisés Rodríguez-Mañero
- Methodist DeBakey Heart and Vascular Center and Methodist Hospital Research Institute, The Methodist Hospital, Houston, TX, USA
| | - Paul Schurmann
- Methodist DeBakey Heart and Vascular Center and Methodist Hospital Research Institute, The Methodist Hospital, Houston, TX, USA
| | - Miguel Valderrábano
- Methodist DeBakey Heart and Vascular Center and Methodist Hospital Research Institute, The Methodist Hospital, Houston, TX, USA
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13
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Aryana A, Bowers MR, O'Neill PG. Outcomes Of Cryoballoon Ablation Of Atrial Fibrillation: A Comprehensive Review. J Atr Fibrillation 2015; 8:1231. [PMID: 27957187 DOI: 10.4022/jafib.1231] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Revised: 07/03/2015] [Accepted: 07/03/2015] [Indexed: 11/10/2022]
Abstract
Over the last decade, cryoballoon ablation has emerged as an effective alternate strategy to point-by-point radiofrequency ablation for treatment of symptomatic atrial fibrillation. There are several reasons for this. First, the acute and long-term safety and efficacy associated with cryoablation appear comparable to that of radiofrequency ablation in patients with both paroxysmal and also persistent atrial fibrillation. Second, cryoablation offers certain advantages over conventional radiofrequency ablation including a gentler learning curve, shorter ablation and procedure times as well as lack of need for costly electroanatomical mapping technologies commonly utilized with radiofrequency ablation. Lastly, with the recent advent of the second-generation cryoballoon, the effectiveness of cryoablation has further improved dramatically. This comprehensive review examines the gradual evolution of the cryoablation tools as well as the rationale and data in support of the currently-available cryoballoon technologies for catheter ablation of atrial fibrillation.
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Affiliation(s)
- Arash Aryana
- Mercy General Hospital and Dignity Health Heart and Vascular Institute, Sacramento, California
| | - Mark R Bowers
- Mercy General Hospital and Dignity Health Heart and Vascular Institute, Sacramento, California
| | - Padraig Gearoid O'Neill
- Mercy General Hospital and Dignity Health Heart and Vascular Institute, Sacramento, California
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14
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Chen YH, Lin H, Xie CL, Zhang XT, Li YG. Efficacy comparison between cryoablation and radiofrequency ablation for patients with cavotricuspid valve isthmus dependent atrial flutter: a meta-analysis. Sci Rep 2015; 5:10910. [PMID: 26039980 PMCID: PMC4454189 DOI: 10.1038/srep10910] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 05/06/2015] [Indexed: 11/09/2022] Open
Abstract
We perform this meta-analysis to compare the efficacy and safety of cryoablation versus radiofrequency ablation for patients with cavotricuspid valve isthmus dependent atrial flutter. By searching EMBASE, MEDLINE, PubMed and Cochrane electronic databases from March 1986 to September 2014, 7 randomized clinical trials were included. Acute (risk ratio[RR]: 0.93; P = 0.14) and long-term (RR: 0.94; P = 0.08) success rate were slightly lower in cryoablation group than in radiofrequency ablation group, but the difference was not statistically significant. Additionally, the fluoroscopy time was nonsignificantly reduced (weighted mean difference[WMD]: −2.83; P = 0.29), whereas procedure time was significantly longer (WMD: 25.95; P = 0.01) in cryoablation group compared with radiofrequency ablation group. Furthermore, Pain perception during the catheter ablation was substantially less in cryoabaltion group than in radiofrequency ablation group (standardized mean difference[SMD]: −2.36; P < 0.00001). Thus, our meta-analysis demonstrated that cryoablation and radiofrequency ablation produce comparable acute and long-term success rate for patients with cavotricuspid valve isthmus dependent atrial flutter. Meanwhile, cryoablation ablation tends to reduce the fluoroscopy time and significantly reduce pain perception in cost of significantly prolonged procedure time.
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Affiliation(s)
- Yi-He Chen
- Department of Cardiology, Xinhua Hospital affiliated to the Medical School of Shanghai Jiaotong University, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Hui Lin
- Department of Respiratory, the second affiliated hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Cheng-Long Xie
- Department of Neurology, Xinhua Hospital affiliated to the Medical School of Shanghai Jiaotong University, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Xiao-Ting Zhang
- Department of Dermatology, the second affiliated hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Yi-Gang Li
- Department of Cardiology, Xinhua Hospital affiliated to the Medical School of Shanghai Jiaotong University, 1665 Kongjiang Road, Shanghai, 200092, China
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15
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Pavlovic N, Knecht S, Reichlin T, Kühne M, Sticherling C. Cryoballoon ablation for atrial fibrillation. Interv Cardiol 2014. [DOI: 10.2217/ica.14.40] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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16
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DHILLON PARAMDEEPS, DOMENICHINI GIULIA, GONNA HANNEY, BASTIAENEN RACHEL, NORMAN MARK, GALLAGHER MARKM. Feasibility and Efficacy of Simultaneous Pulmonary Vein Isolation and Cavotricuspid Isthmus Ablation Using Cryotherapy. J Cardiovasc Electrophysiol 2014; 25:714-8. [DOI: 10.1111/jce.12410] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 01/23/2014] [Accepted: 02/21/2014] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - HANNEY GONNA
- Department of Cardiology; St. Georges Hospital; London UK
| | | | - MARK NORMAN
- Department of Cardiology; St. Georges Hospital; London UK
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17
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Giedrimas E, Goldberger JJ. Catheter ablation for supraventricular tachycardias: contemporary issues. Future Cardiol 2014; 9:581-96. [PMID: 23834697 DOI: 10.2217/fca.13.26] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The treatment of cardiac arrhythmias has evolved significantly over the last 30 years. Understanding of arrhythmia mechanisms has led to pharmacologic therapies, surgical interventions and the widely used percutaneous catheter ablation techniques. The focus of this review is centered on the current catheter ablation therapies available for supraventricular tachycardia. We will discuss current management strategies including challenges when considering catheter ablation therapy for management of supraventricular tachycardias: atrioventricular nodal reentrant tachycardia, atrioventricular reentrant tachycardia utilizing an accessory pathway, atrial tachycardia and atrial flutter. Selected contemporary issues related to supraventricular tachycardia physiology, ablation approaches and ablation outcomes and complications will be discussed. Future goals for electrophysiologists are to continue to improve procedural safety and efficiency, while maintaining the impressive success rates that have been achieved.
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Affiliation(s)
- Evaldas Giedrimas
- Division of Cardiology, Department of Medicine, Northwestern University Feinberg School of Medicine, 251 East Huron Street, Feinberg 8-503E, Chicago, IL 60611, USA
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18
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Feld GK, Yao B. Evaluation of the safety and effectiveness of the CryoMedix cryoablation catheter system for the treatment of atrial flutter and fibrillation. J Interv Card Electrophysiol 2013; 39:37-44. [DOI: 10.1007/s10840-013-9847-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 10/01/2013] [Indexed: 11/30/2022]
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19
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Lehrmann H, Weber R, Park CI, Allgeier J, Schiebeling-Römer J, Arentz T, Jadidi A. “Dormant transisthmus conduction” revealed by adenosine after cavotricuspid isthmus ablation. Heart Rhythm 2012; 9:1942-6. [DOI: 10.1016/j.hrthm.2012.08.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Indexed: 11/26/2022]
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20
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Bastani H, Drca N, Insulander P, Schwieler J, Braunschweig F, Kennebäck G, Sadigh B, Tapanainen J, Jensen-Urstad M. Cryothermal vs. radiofrequency ablation as atrial flutter therapy: a randomized comparison. ACTA ACUST UNITED AC 2012; 15:420-8. [DOI: 10.1093/europace/eus261] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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21
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Cellular damage, platelet activation, and inflammatory response after pulmonary vein isolation: A randomized study comparing radiofrequency ablation with cryoablation. Heart Rhythm 2012; 9:189-96. [PMID: 21920484 DOI: 10.1016/j.hrthm.2011.09.017] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 09/09/2011] [Indexed: 11/24/2022]
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22
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Andrew P, Hamad Y, Jerat S, Montenero A, O’Connor S. Approaching a decade of cryo catheter ablation for type 1 atrial flutter—a meta-analysis and systematic review. J Interv Card Electrophysiol 2011; 32:17-27. [DOI: 10.1007/s10840-011-9582-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Accepted: 04/18/2011] [Indexed: 11/27/2022]
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23
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Schwagten B, Van Belle Y, Jordaens L. Cryoablation: how to improve results in atrioventricular nodal reentrant tachycardia ablation? Europace 2010; 12:1522-5. [PMID: 20719780 PMCID: PMC2963480 DOI: 10.1093/europace/euq294] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ablation for atrioventricular nodal reentry tachycardia is very effective, with a potential for damage to the normal conduction system. Cryoablation is an alternative, as it allows cryomapping, which permits assessment of slow pathway elimination at innocent freezing temperatures, avoiding permanent damage to the normal conduction system. It is associated with shorter radiation times and the absence of heart block in all published data. We discuss in this overview different approaches of cryoenergy delivery (focusing on spot catheter ablation), and how lesion formation is influenced by catheter tip size, application duration, and freezing rate. Some advantages of cryoenergy are explained. Whether these features also apply for an approach with a cryoballoon, e.g. for atrial fibrillation is unclear.
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Affiliation(s)
| | | | - Luc Jordaens
- Corresponding author. Tel: +31 10 463 2699; Fax: +31 10 463 2701, E-mail:
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24
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Pastor A, Núñez A, Guzzo G, de Diego C, Cosío FG. A simple pacing method to diagnose postero-anterior (clockwise) cavo-tricuspid isthmus block after radiofrequency ablation. Europace 2010; 12:1290-5. [PMID: 20562111 DOI: 10.1093/europace/euq171] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
AIMS Bidirectional block of the cavo-tricuspid isthmus (CTI) is a widely accepted endpoint for typical atrial flutter ablation, but its evaluation may be difficult, especially in the postero-anterior (clockwise) direction. The main goal was to evaluate pacing at the septal edge of the ablation line as an indicator of clockwise CTI block and as a predictor for flutter recurrence. METHODS AND RESULTS In 94 patients undergoing flutter ablation, CTI block in the antero-posterior (counterclockwise) direction was determined by differential pacing from several levels of the anterior right atrial (RA). CTI block in the clockwise direction was evaluated by analysing electrograms (EGM) at the ablation line during differential pacing of the septal RA (differential septal pacing) or by anterior sequence of RA during pacing septal isthmus, next to the ablation line (septal CTI pacing). Ablation produced bidirectional block in 78% of the patients, unidirectional counterclockwise block in 9% and bidirectional conduction persisted in 13%. After follow-up (37 +/- 23 months), flutter recurrence occurred in 13% (48% if persistent conduction vs. 3% if bidirectional block, P < 0.001). During differential septal pacing, EGMs were difficult to interpret in 36% of the patients; in these cases, the diagnosis of CTI block or conduction in the clockwise direction was clearly established by using septal CTI pacing. CONCLUSION Activation sequence of anterior RA during septal CTI pacing, next to the ablation line, is a reliable and simple method to diagnose clockwise CTI block and is associated with a low flutter recurrence.
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Affiliation(s)
- Agustín Pastor
- Cardiology Service of Hospital Universitario de Getafe, Ctra de Toledo, Getafe, Madrid, Spain
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