1
|
Bjerregaard CL, Skaarup KG, Lassen MCH, Biering-Sørensen T, Olsen FJ. Strain Imaging and Ventricular Arrhythmia. Diagnostics (Basel) 2023; 13:diagnostics13101778. [PMID: 37238262 DOI: 10.3390/diagnostics13101778] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 05/11/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023] Open
Abstract
Ventricular arrhythmia is one of the main causes of sudden cardiac death. Hence, identifying patients at risk of ventricular arrhythmias and sudden cardiac death is important but can be challenging. The indication for an implantable cardioverter defibrillator as a primary preventive strategy relies on the left ventricular ejection fraction as a measure of systolic function. However, ejection fraction is flawed by technical constraints and is an indirect measure of systolic function. There has, therefore, been an incentive to identify other markers to optimize the risk prediction of malignant arrhythmias to select proper candidates who could benefit from an implantable cardioverter defibrillator. Speckle-tracking echocardiography allows for a detailed assessment of cardiac mechanics, and strain imaging has repeatedly been shown to be a sensitive technique to identify systolic dysfunction unrecognized by ejection fraction. Several strain measures, including global longitudinal strain, regional strain, and mechanical dispersion, have consequently been proposed as potential markers of ventricular arrhythmias. In this review, we will provide an overview of the potential use of different strain measures in the context of ventricular arrhythmias.
Collapse
Affiliation(s)
- Caroline Løkke Bjerregaard
- Department of Cardiology, Copenhagen University Hospital-Herlev and Gentofte, 2900 Hellerup, Denmark
- Center for Translational Cardiology and Pragmatic Randomized Trials, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Kristoffer Grundtvig Skaarup
- Department of Cardiology, Copenhagen University Hospital-Herlev and Gentofte, 2900 Hellerup, Denmark
- Center for Translational Cardiology and Pragmatic Randomized Trials, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Mats Christian Højbjerg Lassen
- Department of Cardiology, Copenhagen University Hospital-Herlev and Gentofte, 2900 Hellerup, Denmark
- Center for Translational Cardiology and Pragmatic Randomized Trials, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Tor Biering-Sørensen
- Department of Cardiology, Copenhagen University Hospital-Herlev and Gentofte, 2900 Hellerup, Denmark
- Center for Translational Cardiology and Pragmatic Randomized Trials, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Flemming Javier Olsen
- Department of Cardiology, Copenhagen University Hospital-Herlev and Gentofte, 2900 Hellerup, Denmark
- Center for Translational Cardiology and Pragmatic Randomized Trials, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| |
Collapse
|
2
|
Vlachos K, Letsas KP, Srinivasan NT, Frontera A, Efremidis M, Dragasis S, Martin CA, Martin R, Nakashima T, Bazoukis G, Kitamura T, Mililis P, Saplaouras A, Georgopoulos S, Sofoulis S, Kariki O, Koskina S, Takigawa M, Sacher F, Jais P, Santangeli P. The value of functional substrate mapping in ventricular tachycardia ablation. Heart Rhythm O2 2023; 4:134-146. [PMID: 36873315 PMCID: PMC9975018 DOI: 10.1016/j.hroo.2022.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
In the setting of structural heart disease, ventricular tachycardia (VT) is typically associated with a re-entrant mechanism. In patients with hemodynamically tolerated VTs, activation and entrainment mapping remain the gold standard for the identification of the critical parts of the circuit. However, this is rarely accomplished, as most VTs are not hemodynamically tolerated to permit mapping during tachycardia. Other limitations include noninducibility of arrhythmia or nonsustained VT. This has led to the development of substrate mapping techniques during sinus rhythm, eliminating the need for prolonged periods of mapping during tachycardia. Recurrence rates following VT ablation are high; therefore, new mapping techniques for substrate characterization are required. Advances in catheter technology and especially multielectrode mapping of abnormal electrograms has increased the ability to identify the mechanism of scar-related VT. Several substrate-guided approaches have been developed to overcome this, including scar homogenization and late potential mapping. Dynamic substrate changes are mainly identified within regions of myocardial scar and can be identified as local abnormal ventricular activities. Furthermore, mapping strategies incorporating ventricular extrastimulation, including from different directions and coupling intervals, have been shown to increase the accuracy of substrate mapping. The implementation of extrastimulus substrate mapping and automated annotation require less extensive ablation and would make VT ablation procedures less cumbersome and accessible to more patients.
Collapse
Affiliation(s)
- Konstantinos Vlachos
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
- Address reprint requests and correspondence: Dr Konstantinos Vlachos, Onassis Cardiac Surgery Center, Electrophysiology Department, Syggrou Avenue 356, PC 176 74, Athens, Greece.
| | | | - Neil T. Srinivasan
- Department of Cardiac Electrophysiology, Essex Cardiothoracic Centre, Basildon, United Kingdom
- Royal Papworth Hospital NHS Foundation Trust, Cambridge, United Kingdom
| | - Antonio Frontera
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Michael Efremidis
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Stelios Dragasis
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Claire A. Martin
- Department of Basic and Clinical Sciences, University of Nicosia Medical School, Nicosia, Cyprus
| | - Ruaridh Martin
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Takashi Nakashima
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - George Bazoukis
- Department of Basic and Clinical Sciences, University of Nicosia Medical School, Nicosia, Cyprus
- Department of Cardiology, Larnaca General Hospital, Larnaca, Cyprus
| | - Takeshi Kitamura
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Panagiotis Mililis
- Laboratory of Cardiac Electrophysiology, General Hospital of Athens Evangelismos, Athens, Greece
| | | | - Stamatios Georgopoulos
- Laboratory of Cardiac Electrophysiology, General Hospital of Athens Evangelismos, Athens, Greece
| | - Stamatios Sofoulis
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Ourania Kariki
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Stavroula Koskina
- Electrophysiology Department, Onassis Cardiac Surgery Center, Athens, Greece
| | - Masateru Takigawa
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Frédéric Sacher
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Pierre Jais
- Cardiac Pacing and Electrophysiology Department, Hôpital Cardiologique du Haut Lévêque, Pessac, France
- INSERM U1045, Institut hostpialo-universitaire–L’institut de rythmologie et modélisation cardiaque, Centre Hospitalier Universitaire de Bordeaux, Université de Bordeaux, Pessac, France
| | - Pasquale Santangeli
- Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| |
Collapse
|
3
|
Aboud AA, Davogustto G, Adeola O, Richardson TD, Tokutake K, Michaud GF, Stevenson WG, Kanagasundram A. Substrate Mapping Alters Ventricular Tachycardia Inducibility. Circ Arrhythm Electrophysiol 2023; 16:e010889. [PMID: 36602818 DOI: 10.1161/circep.122.010889] [Citation(s) in RCA: 1] [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] [Indexed: 01/06/2023]
Abstract
BACKGROUND Initiation of ventricular tachycardia (VT) by programmed electrical stimulation (PES) has an important role to allow mapping and assess ablation end points. We hypothesized that substrate mapping may alter VT inducibility by mechanical bumping of critical sites. METHODS Subjects with left ventricular scar-related VT that was inducible by PES who were undergoing ablation were included. PES was repeated after substrate mapping (Group I) or after time under sedation/anesthesia during which additional imaging and transeptal puncture were performed without substrate mapping (Group II). The response to the second PES was categorized as type I if the same VT was induced, type II if a different VT was induced, and type III if VT was not inducible. RESULTS Twenty-eight patients (median age 66 years, 61% ischemic cardiomyopathy), 14 in Group I and 14 in Group II, were included. Age, time between initial and second PES, type of cardiomyopathy, ejection fraction, and anesthesia methods were not different between the 2 groups. Initial VT cycle length, however, was shorter in Group I (305 millisecond [range, 235-600] versus 350 millisecond [range, 235-600], P=0.016). Also, Group I required more extrastimuli to induce VT in PES 1 (2 [1-4] versus 2 [1-3], P=0.022). In Group I, following substrate mapping, the second PES induced the same VT in 3 patients (21%), a different VT in 9 (64%), and no VT in 2 (14%) patients. In contrast, in Group II the same VT was induced in 10 (71%) patients, a different VT in 3 (21%) and no VT in 1 (7%) patient (P=0.017). CONCLUSIONS Mechanical effects of substrate mapping commonly alter inducibility of VT. This has important implications for catheter ablation procedure planning and acute assessment of outcome and can potentially account for some recurrent VTs that are not recognized at the time of the procedure.
Collapse
Affiliation(s)
- Asad A Aboud
- Ascension Saint Thomas Heart Center, Nashville, TN (A.A.A.)
| | - Giovanni Davogustto
- Vanderbilt Heart and Vascular Institute, Nashville, TN (G.D., T.D.R., K.T., G.F.M., W.G.S., A.K.)
| | - Oluwaseun Adeola
- Methodist Hospital - Cardiology Clinic of San Antonio, TN (O.A.)
| | - Travis D Richardson
- Vanderbilt Heart and Vascular Institute, Nashville, TN (G.D., T.D.R., K.T., G.F.M., W.G.S., A.K.)
| | - Kenichi Tokutake
- Vanderbilt Heart and Vascular Institute, Nashville, TN (G.D., T.D.R., K.T., G.F.M., W.G.S., A.K.)
| | - Gregory F Michaud
- Vanderbilt Heart and Vascular Institute, Nashville, TN (G.D., T.D.R., K.T., G.F.M., W.G.S., A.K.)
| | - William G Stevenson
- Vanderbilt Heart and Vascular Institute, Nashville, TN (G.D., T.D.R., K.T., G.F.M., W.G.S., A.K.)
| | - Arvindh Kanagasundram
- Vanderbilt Heart and Vascular Institute, Nashville, TN (G.D., T.D.R., K.T., G.F.M., W.G.S., A.K.)
| |
Collapse
|
4
|
Campos FO, Shiferaw Y, Whitaker J, Plank G, Bishop MJ. Subthreshold delayed afterdepolarizations provide an important arrhythmogenic substrate in the border zone of infarcted hearts. Heart Rhythm 2023; 20:299-306. [PMID: 36343889 DOI: 10.1016/j.hrthm.2022.10.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 10/26/2022] [Accepted: 10/31/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Fernando O Campos
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom.
| | - Yohannes Shiferaw
- Department of Physics, University of California, Los Angeles, California
| | - John Whitaker
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Gernot Plank
- Gottfried Schatz Research Center, Division of Biophysics, Medical University of Graz, Graz, Austria
| | - Martin J Bishop
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| |
Collapse
|
5
|
Sridharan A, Bradfield JS, Shivkumar K, Ajijola OA. Autonomic nervous system and arrhythmias in structural heart disease. Auton Neurosci 2022; 243:103037. [DOI: 10.1016/j.autneu.2022.103037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/21/2022] [Accepted: 09/21/2022] [Indexed: 11/28/2022]
|
6
|
Frøysa V, Berg GJ, Eftestøl T, Woie L, Ørn S. Texture-based probability mapping for automatic scar assessment in late gadolinium-enhanced cardiovascular magnetic resonance images. Eur J Radiol Open 2021; 8:100387. [PMID: 34926726 PMCID: PMC8649215 DOI: 10.1016/j.ejro.2021.100387] [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: 09/02/2021] [Revised: 11/16/2021] [Accepted: 11/22/2021] [Indexed: 01/18/2023] Open
Abstract
Purpose To evaluate a novel texture-based probability mapping (TPM) method for scar size estimation in LGE-CMRI. Methods This retrospective proof-of-concept study included chronic myocardial scars from 52 patients. The TPM was compared with three signal intensity-based methods: manual segmentation, full-width-half-maximum (FWHM), and 5-standard deviation (5-SD). TPM is generated using machine learning techniques, expressing the probability of scarring in pixels. The probability is derived by comparing the texture of the 3 × 3 pixel matrix surrounding each pixel with reference dictionaries from patients with established myocardial scars. The Sørensen-Dice coefficient was used to find the optimal TPM range. A non-parametric test was used to test the correlation between infarct size and remodeling parameters. Bland-Altman plots were performed to assess agreement among the methods. Results The study included 52 patients (76.9% male; median age 64.5 years (54, 72.5)). A TPM range of 0.328–1.0 was found to be the optimal probability interval to predict scar size compared to manual segmentation, median dice (25th and 75th percentiles)): 0.69(0.42–0.81). There was no significant difference in the scar size between TPM and 5-SD. However, both 5-SD and TPM yielded larger scar sizes compared with FWHM (p < 0.001 and p = 0.002). There were strong correlations between scar size measured by TPM, and left ventricular ejection fraction (LVEF, r = −0.76, p < 0.001), left ventricular end-diastolic volume index (r = 0.73, p < 0.001), and left ventricular end-systolic volume index (r = 0.75, p < 0.001). Conclusion The TPM method is comparable with current SI-based methods, both for the scar size assessment and the relationship with left ventricular remodeling when applied on LGE-CMRI. Texture based probability mapping can be used to evaluate myocardial scar size. The method can assess myocardial fibrosis independent of signal intensity. The TPM method shows strong correlations between scar size and left ventricular ejection fraction.
Collapse
Affiliation(s)
- Vidar Frøysa
- Department of Cardiology, Stavanger University Hospital, Armauer Hansens vei 20, 4011, Stavanger, Norway
| | - Gøran J Berg
- Department of Electrical and Computer Science, University of Stavanger, P.O. box 8600, 4036 Stavanger, Norway
| | - Trygve Eftestøl
- Department of Electrical and Computer Science, University of Stavanger, P.O. box 8600, 4036 Stavanger, Norway
| | - Leik Woie
- Department of Electrical and Computer Science, University of Stavanger, P.O. box 8600, 4036 Stavanger, Norway
| | - Stein Ørn
- Department of Cardiology, Stavanger University Hospital, Armauer Hansens vei 20, 4011, Stavanger, Norway.,Department of Electrical and Computer Science, University of Stavanger, P.O. box 8600, 4036 Stavanger, Norway
| |
Collapse
|
7
|
Peng F, Zheng T, Tang X, Liu Q, Sun Z, Feng Z, Zhao H, Gong L. Magnetic Resonance Texture Analysis in Myocardial Infarction. Front Cardiovasc Med 2021; 8:724271. [PMID: 34778395 PMCID: PMC8581163 DOI: 10.3389/fcvm.2021.724271] [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: 06/12/2021] [Accepted: 09/27/2021] [Indexed: 11/13/2022] Open
Abstract
Texture analysis (TA) is a newly arisen field that can detect the invisible MRI signal changes among image pixels. Myocardial infarction (MI) is cardiomyocyte necrosis caused by myocardial ischemia and hypoxia, becoming the primary cause of death and disability worldwide. In recent years, various TA studies have been performed in patients with MI and show a good clinical application prospect. This review briefly presents the main pathogenesis and pathophysiology of MI, introduces the overview and workflow of TA, and summarizes multiple magnetic resonance TA (MRTA) clinical applications in MI. We also discuss the facing challenges currently for clinical utilization and propose the prospect.
Collapse
Affiliation(s)
- Fei Peng
- Department of Medical Imaging Center, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Tian Zheng
- Department of Medical Imaging Center, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiaoping Tang
- Department of Medical Imaging Center, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Qiao Liu
- Department of Medical Imaging Center, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zijing Sun
- Department of Medical Imaging Center, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhaofeng Feng
- Department of Medical Imaging Center, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Heng Zhao
- Department of Radiology, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, China
| | - Lianggeng Gong
- Department of Medical Imaging Center, Second Affiliated Hospital of Nanchang University, Nanchang, China
| |
Collapse
|
8
|
Zegard A, Okafor O, de Bono J, Kalla M, Lencioni M, Marshall H, Hudsmith L, Qiu T, Steeds R, Stegemann B, Leyva F. Greyzone myocardial fibrosis and ventricular arrhythmias in patients with a left ventricular ejection fraction >35. Europace 2021; 24:31-39. [PMID: 34379762 PMCID: PMC8742629 DOI: 10.1093/europace/euab167] [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: 02/08/2021] [Indexed: 11/15/2022] Open
Abstract
AIMS To determine whether myocardial fibrosis and greyzone fibrosis (GZF) on cardiovascular magnetic resonance (CMR) is associated with ventricular arrhythmias in patients with coronary artery disease (CAD) and a left ventricular ejection fraction (LVEF) >35%. METHODS AND RESULTS In this retrospective study of CAD patients, GZF mass using the 3SD method (GZF3SD) and total fibrosis mass using the 2SD method (TF2SD) on CMR were assessed in relation to the primary, combined endpoint of sudden cardiac death, ventricular tachycardia, ventricular fibrillation, or resuscitated cardiac arrest. Among 701 patients [age: 65.8 ± 12.3 years (mean ± SD)], 28 (3.99%) patients met the primary endpoint over 5.91 years (median; interquartile range 4.42-7.64). In competing risks analysis, a GZF3SD mass ≥5.0 g was strongly associated with the primary endpoint [subdistribution hazard ratio (sHR): 17.4 (95% confidence interval, CI 6.64-45.5); area under receiver operator characteristic curve (AUC): 0.85, P < 0.001]. A weaker association was observed for TF2SD mass ≥23 g [sHR 10.4 (95% CI 4.22-25.8); AUC: 0.80, P < 0.001]. The range of sHRs for GZF3SD mass (1-527) was wider than for TF2SD mass (1-37.6). CONCLUSIONS In CAD patients with an LVEF >35%, GZF3SD mass was strongly associated with the arrhythmic endpoint. These findings hold promise for its use in identifying patients with CAD and an LVEF >35% at risk of arrhythmic events.
Collapse
Affiliation(s)
- Abbasin Zegard
- Aston Medical School, Aston University, Birmingham, UK.,Department of Cardiology, University Hospitals Birmingham, Queen Elizabeth, Birmingham, UK
| | - Osita Okafor
- Aston Medical School, Aston University, Birmingham, UK.,Department of Cardiology, University Hospitals Birmingham, Queen Elizabeth, Birmingham, UK
| | - Joseph de Bono
- Department of Cardiology, University Hospitals Birmingham, Queen Elizabeth, Birmingham, UK
| | - Manish Kalla
- Department of Cardiology, University Hospitals Birmingham, Queen Elizabeth, Birmingham, UK
| | - Mauro Lencioni
- Department of Cardiology, University Hospitals Birmingham, Queen Elizabeth, Birmingham, UK
| | - Howard Marshall
- Department of Cardiology, University Hospitals Birmingham, Queen Elizabeth, Birmingham, UK
| | - Lucy Hudsmith
- Department of Cardiology, University Hospitals Birmingham, Queen Elizabeth, Birmingham, UK
| | - Tian Qiu
- Aston Medical School, Aston University, Birmingham, UK
| | - Richard Steeds
- Department of Cardiology, University Hospitals Birmingham, Queen Elizabeth, Birmingham, UK
| | | | | |
Collapse
|
9
|
Abstract
Conduction disorders and arrhythmias remain difficult to treat and are increasingly prevalent owing to the increasing age and body mass of the general population, because both are risk factors for arrhythmia. Many of the underlying conditions that give rise to arrhythmia - including atrial fibrillation and ventricular arrhythmia, which frequently occur in patients with acute myocardial ischaemia or heart failure - can have an inflammatory component. In the past, inflammation was viewed mostly as an epiphenomenon associated with arrhythmia; however, the recently discovered inflammatory and non-canonical functions of cardiac immune cells indicate that leukocytes can be arrhythmogenic either by altering tissue composition or by interacting with cardiomyocytes; for example, by changing their phenotype or perhaps even by directly interfering with conduction. In this Review, we discuss the electrophysiological properties of leukocytes and how these cells relate to conduction in the heart. Given the thematic parallels, we also summarize the interactions between immune cells and neural systems that influence information transfer, extrapolating findings from the field of neuroscience to the heart and defining common themes. We aim to bridge the knowledge gap between electrophysiology and immunology, to promote conceptual connections between these two fields and to explore promising opportunities for future research.
Collapse
|
10
|
Myocardial Fibrosis as a Predictor of Sudden Death in Patients With Coronary Artery Disease. J Am Coll Cardiol 2021; 77:29-41. [PMID: 33413938 DOI: 10.1016/j.jacc.2020.10.046] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND The "gray zone" of myocardial fibrosis (GZF) on cardiovascular magnetic resonance may be a substrate for ventricular arrhythmias (VAs). OBJECTIVES The purpose of this study was to determine whether GZF predicts sudden cardiac death (SCD) and VAs (ventricular fibrillation or sustained ventricular tachycardia) in patients with coronary artery disease (CAD) and a wide range of left ventricular ejection fractions (LVEFs). METHODS In this retrospective study of CAD patients, the presence of myocardial fibrosis on visual assessment (MFVA) and GZF mass in patients with MFVA were assessed in relation to SCD and the composite, arrhythmic endpoint of SCD or VAs. RESULTS Among 979 patients (mean age [± SD]: 65.8 ± 12.3 years), 29 (2.96%) experienced SCD and 80 (8.17%) met the arrhythmic endpoint over median 5.82 years (interquartile range: 4.1 to 7.3 years). In the whole cohort, MFVA was strongly associated with SCD (hazard ratio: 10.1; 95% confidence interval [CI]: 1.42 to 1,278.9) and the arrhythmic endpoint (hazard ratio: 28.0; 95% CI: 4.07 to 3,525.4). In competing risks analyses, associations between LVEF <35% and SCD (subdistribution hazard ratio [sHR]: 2.99; 95% CI: 1.42 to 6.31) and the arrhythmic endpoint (sHR: 4.71; 95% CI: 2.97 to 7.47) were weaker. In competing risk analyses of the MFVA subcohort (n = 832), GZF using the 3SD method (GZF3SD) >5.0 g was strongly associated with SCD (sHR: 10.8; 95% CI: 3.74 to 30.9) and the arrhythmic endpoint (sHR: 7.40; 95% CI: 4.29 to 12.8). Associations between LVEF <35% and SCD (sHR: 2.62; 95% CI: 1.24 to 5.52) and the arrhythmic endpoint (sHR: 4.14; 95% CI: 2.61 to 6.57) were weaker. CONCLUSIONS In CAD patients, MFVA plus quantified GZF3SD mass was more strongly associated with SCD and VAs than LVEF. In selecting patients for implantable cardioverter-defibrillators, assessment of MFVA followed by quantification of GZF3SD mass may be preferable to LVEF.
Collapse
|
11
|
Proietti R, Lichelli L, Lellouche N, Dhanjal T. The challenge of optimising ablation lesions in catheter ablation of ventricular tachycardia. J Arrhythm 2021; 37:140-147. [PMID: 33664896 PMCID: PMC7896466 DOI: 10.1002/joa3.12489] [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: 09/19/2020] [Revised: 11/07/2020] [Accepted: 11/30/2020] [Indexed: 12/26/2022] Open
Abstract
Radiofrequency catheter ablation has become an established treatment for ventricular tachycardia. The exponential increase in procedures has provided further insights into mechanisms causing arrhythmias and identification of ablation targets with the development of new mapping strategies. Since the definition of criteria to identify myocardial dense scar, borderzone and normal myocardium, and the description of isolated late potentials, local abnormal ventricular activity and decrementing evoked potential mapping, substrate-guided ablation has progressively become the method of choice to guide procedures. Accordingly, a wide range of ablation strategies have been developed from scar homogenization to scar dechanneling or core isolation using increasingly complex and precise tools such as multipolar or omnipolar mapping catheters. Despite these advances long-term success rates for VT ablation have remained static and lower in nonischemic than ischemic heart disease because of the more patchy distribution of myocardial scar. Ablation aims to deliver an irreversible loss of cellular excitability by myocardial heating to a temperatures exceeding 50°C. Many indicators of ablation efficacy have been developed such as contact force, impedance drop, force-time integral and ablation index, mostly validated in atrial fibrillation ablation. In ventricular procedures there is limited data and ablation lesion parameters have been scarcely investigated. Since VT arrhythmia recurrence can be related to inadequate RF lesion formation, it seems reasonable to establish robust markers of ablation efficacy.
Collapse
Affiliation(s)
- Riccardo Proietti
- Department of CardiologyUniversity Hospital Coventry & Warwickshire NHS TrustCoventryUK
- Department of Cardiac, Thoracic, Vascular SciencesUniversity of PaduaPaduaItaly
| | - Luca Lichelli
- Department of Cardiac, Thoracic, Vascular SciencesUniversity of PaduaPaduaItaly
| | - Nicolas Lellouche
- Hopital Henri Mondor Albert ChenevierCreteilFrance
- Inserm U955University Paris Est Creteil Paris XIIParisFrance
| | - Tarvinder Dhanjal
- Department of CardiologyUniversity Hospital Coventry & Warwickshire NHS TrustCoventryUK
- University of Warwick (Medical School)CoventryUK
| |
Collapse
|
12
|
Proietti R, Dowd R, Gee LV, Yusuf S, Panikker S, Hayat S, Osman F, Patel K, Salim H, Aldhoon B, Foster W, Merghani A, Kuehl M, Banerjee P, Lellouche N, Dhanjal T. Impact of a high-density grid catheter on long-term outcomes for structural heart disease ventricular tachycardia ablation. J Interv Card Electrophysiol 2021; 62:519-529. [PMID: 33392856 PMCID: PMC8645535 DOI: 10.1007/s10840-020-00918-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 10/31/2020] [Indexed: 01/04/2023]
Abstract
Background Substrate mapping has highlighted the importance of targeting diastolic conduction channels and late potentials during ventricular tachycardia (VT) ablation. State-of-the-art multipolar mapping catheters have enhanced mapping capabilities. The purpose of this study was to investigate whether long-term outcomes were improved with the use of a HD Grid mapping catheter combining complementary mapping strategies in patients with structural heart disease VT. Methods Consecutive patients underwent VT ablation assigned to either HD Grid, Pentaray, Duodeca, or point-by-point (PbyP) RF mapping catheters. Clinical endpoints included recurrent anti-tachycardia pacing (ATP), appropriate shock, asymptomatic non-sustained VT, or all-cause death. Results Seventy-three procedures were performed (33 HD Grid, 22 Pentaray, 12 Duodeca, and 6 PbyP) with no significant difference in baseline characteristics. Substrate mapping was performed in 97% of cases. Activation maps were generated in 82% of HD Grid cases (Pentaray 64%; Duodeca 92%; PbyP 33% (p = 0.025)) with similar trends in entrainment and pace mapping. Elimination of all VTs occurred in 79% of HD Grid cases (Pentaray 55%; Duodeca 83%; PbyP 33% (p = 0.04)). With a mean follow-up of 372 ± 234 days, freedom from recurrent ATP and shock was 97% and 100% respectively in the HD Grid group (Pentaray 64%, 82%; Duodeca 58%, 83%; PbyP 33%, 33% (log rank p = 0.0042, p = 0.0002)). Conclusions This study highlights a step-wise improvement in survival free from ICD therapies as the density of mapping capability increases. By using a high-density mapping catheter and combining complementary mapping strategies in a strict procedural workflow, long-term clinical outcomes are improved.
Collapse
Affiliation(s)
- Riccardo Proietti
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK.,Department of Cardiac, Thoracic, Vascular Sciences, and University of Padua, Padua, Italy
| | - Rory Dowd
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Lim Ven Gee
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Shamil Yusuf
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Sandeep Panikker
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Sajad Hayat
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Faizel Osman
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK.,University of Warwick (Medical School), Gibbet Hill, Coventry, CV4 7AJ, UK
| | - Kiran Patel
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK.,University of Warwick (Medical School), Gibbet Hill, Coventry, CV4 7AJ, UK
| | - Handi Salim
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Bashar Aldhoon
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Will Foster
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Ahmed Merghani
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Michael Kuehl
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Prithwish Banerjee
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK
| | - Nicolas Lellouche
- Hopital Henri Mondor Albert Chenevier, University Paris Est Creteil Paris XII, Avenue du Marechal de Lattre de Tassigny, 94000, Creteil, Inserm U955, Paris, France
| | - Tarvinder Dhanjal
- Department of Cardiology, University Hospital Coventry & Warwickshire NHS Trust, Clifford Bridge Road, Coventry, CV2 2DX, UK. .,University of Warwick (Medical School), Gibbet Hill, Coventry, CV4 7AJ, UK.
| |
Collapse
|
13
|
Cronin EM, Bogun FM, Maury P, Peichl P, Chen M, Namboodiri N, Aguinaga L, Leite LR, Al-Khatib SM, Anter E, Berruezo A, Callans DJ, Chung MK, Cuculich P, d'Avila A, Deal BJ, Della Bella P, Deneke T, Dickfeld TM, Hadid C, Haqqani HM, Kay GN, Latchamsetty R, Marchlinski F, Miller JM, Nogami A, Patel AR, Pathak RK, Sáenz Morales LC, Santangeli P, Sapp JL, Sarkozy A, Soejima K, Stevenson WG, Tedrow UB, Tzou WS, Varma N, Zeppenfeld K. 2019 HRS/EHRA/APHRS/LAHRS expert consensus statement on catheter ablation of ventricular arrhythmias. Europace 2020; 21:1143-1144. [PMID: 31075787 DOI: 10.1093/europace/euz132] [Citation(s) in RCA: 222] [Impact Index Per Article: 55.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Ventricular arrhythmias are an important cause of morbidity and mortality and come in a variety of forms, from single premature ventricular complexes to sustained ventricular tachycardia and fibrillation. Rapid developments have taken place over the past decade in our understanding of these arrhythmias and in our ability to diagnose and treat them. The field of catheter ablation has progressed with the development of new methods and tools, and with the publication of large clinical trials. Therefore, global cardiac electrophysiology professional societies undertook to outline recommendations and best practices for these procedures in a document that will update and replace the 2009 EHRA/HRS Expert Consensus on Catheter Ablation of Ventricular Arrhythmias. An expert writing group, after reviewing and discussing the literature, including a systematic review and meta-analysis published in conjunction with this document, and drawing on their own experience, drafted and voted on recommendations and summarized current knowledge and practice in the field. Each recommendation is presented in knowledge byte format and is accompanied by supportive text and references. Further sections provide a practical synopsis of the various techniques and of the specific ventricular arrhythmia sites and substrates encountered in the electrophysiology lab. The purpose of this document is to help electrophysiologists around the world to appropriately select patients for catheter ablation, to perform procedures in a safe and efficacious manner, and to provide follow-up and adjunctive care in order to obtain the best possible outcomes for patients with ventricular arrhythmias.
Collapse
Affiliation(s)
| | | | | | - Petr Peichl
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Minglong Chen
- Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Narayanan Namboodiri
- Sree Chitra Institute for Medical Sciences and Technology, Thiruvananthapuram, India
| | | | | | | | - Elad Anter
- Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | | | | | | | | | - Andre d'Avila
- Hospital Cardiologico SOS Cardio, Florianopolis, Brazil
| | - Barbara J Deal
- Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | | | | | | | - Claudio Hadid
- Hospital General de Agudos Cosme Argerich, Buenos Aires, Argentina
| | - Haris M Haqqani
- University of Queensland, The Prince Charles Hospital, Chermside, Australia
| | - G Neal Kay
- University of Alabama at Birmingham, Birmingham, Alabama
| | | | | | - John M Miller
- Indiana University School of Medicine, Krannert Institute of Cardiology, Indianapolis, Indiana
| | | | - Akash R Patel
- University of California San Francisco Benioff Children's Hospital, San Francisco, California
| | | | | | | | - John L Sapp
- Queen Elizabeth II Health Sciences Centre, Halifax, Canada
| | - Andrea Sarkozy
- University Hospital Antwerp, University of Antwerp, Antwerp, Belgium
| | | | | | | | | | | | | | | |
Collapse
|
14
|
Cronin EM, Bogun FM, Maury P, Peichl P, Chen M, Namboodiri N, Aguinaga L, Leite LR, Al-Khatib SM, Anter E, Berruezo A, Callans DJ, Chung MK, Cuculich P, d'Avila A, Deal BJ, Bella PD, Deneke T, Dickfeld TM, Hadid C, Haqqani HM, Kay GN, Latchamsetty R, Marchlinski F, Miller JM, Nogami A, Patel AR, Pathak RK, Saenz Morales LC, Santangeli P, Sapp JL, Sarkozy A, Soejima K, Stevenson WG, Tedrow UB, Tzou WS, Varma N, Zeppenfeld K. 2019 HRS/EHRA/APHRS/LAHRS expert consensus statement on catheter ablation of ventricular arrhythmias. J Interv Card Electrophysiol 2020; 59:145-298. [PMID: 31984466 PMCID: PMC7223859 DOI: 10.1007/s10840-019-00663-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Ventricular arrhythmias are an important cause of morbidity and mortality and come in a variety of forms, from single premature ventricular complexes to sustained ventricular tachycardia and fibrillation. Rapid developments have taken place over the past decade in our understanding of these arrhythmias and in our ability to diagnose and treat them. The field of catheter ablation has progressed with the development of new methods and tools, and with the publication of large clinical trials. Therefore, global cardiac electrophysiology professional societies undertook to outline recommendations and best practices for these procedures in a document that will update and replace the 2009 EHRA/HRS Expert Consensus on Catheter Ablation of Ventricular Arrhythmias. An expert writing group, after reviewing and discussing the literature, including a systematic review and meta-analysis published in conjunction with this document, and drawing on their own experience, drafted and voted on recommendations and summarized current knowledge and practice in the field. Each recommendation is presented in knowledge byte format and is accompanied by supportive text and references. Further sections provide a practical synopsis of the various techniques and of the specific ventricular arrhythmia sites and substrates encountered in the electrophysiology lab. The purpose of this document is to help electrophysiologists around the world to appropriately select patients for catheter ablation, to perform procedures in a safe and efficacious manner, and to provide follow-up and adjunctive care in order to obtain the best possible outcomes for patients with ventricular arrhythmias.
Collapse
Affiliation(s)
| | | | | | - Petr Peichl
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Minglong Chen
- Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Narayanan Namboodiri
- Sree Chitra Institute for Medical Sciences and Technology, Thiruvananthapuram, India
| | | | | | | | - Elad Anter
- Beth Israel Deaconess Medical Center, Boston, MA, USA
| | | | | | | | | | - Andre d'Avila
- Hospital Cardiologico SOS Cardio, Florianopolis, Brazil
| | - Barbara J Deal
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | | | | | - Claudio Hadid
- Hospital General de Agudos Cosme Argerich, Buenos Aires, Argentina
| | - Haris M Haqqani
- University of Queensland, The Prince Charles Hospital, Chermside, Australia
| | - G Neal Kay
- University of Alabama at Birmingham, Birmingham, AL, USA
| | | | | | - John M Miller
- Indiana University School of Medicine, Krannert Institute of Cardiology, Indianapolis, IN, USA
| | | | - Akash R Patel
- University of California San Francisco Benioff Children's Hospital, San Francisco, CA, USA
| | | | | | | | - John L Sapp
- Queen Elizabeth II Health Sciences Centre, Halifax, Canada
| | - Andrea Sarkozy
- University Hospital Antwerp, University of Antwerp, Antwerp, Belgium
| | | | | | | | | | | | | |
Collapse
|
15
|
Dries E, Amoni M, Vandenberk B, Johnson DM, Gilbert G, Nagaraju CK, Puertas RD, Abdesselem M, Santiago DJ, Roderick HL, Claus P, Willems R, Sipido KR. Altered adrenergic response in myocytes bordering a chronic myocardial infarction underlies in vivo triggered activity and repolarization instability. J Physiol 2020; 598:2875-2895. [PMID: 31900932 PMCID: PMC7496440 DOI: 10.1113/jp278839] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 01/01/2020] [Indexed: 01/24/2023] Open
Abstract
Key points Ventricular arrhythmias are a major complication after myocardial infarction (MI), associated with sympathetic activation. The structurally heterogeneous peri‐infarct zone is a known substrate, but the functional role of the myocytes is less well known. Recordings of monophasic action potentials in vivo reveal that the peri‐infarct zone is a source of delayed afterdepolarizations (DADs) and has a high beat‐to‐beat variability of repolarization (BVR) during adrenergic stimulation (isoproterenol, ISO). Myocytes isolated from the peri‐infarct region have more DADs and spontaneous action potentials, with spontaneous Ca2+ release, under ISO. These myocytes also have reduced repolarization reserve and increased BVR. Other properties of post‐MI remodelling are present in both peri‐infarct and remote myocytes. These data highlight the importance of altered myocyte adrenergic responses in the peri‐infarct region as source and substrate of post‐MI arrhythmias.
Abstract Ventricular arrhythmias are a major early complication after myocardial infarction (MI). The heterogeneous peri‐infarct zone forms a substrate for re‐entry while arrhythmia initiation is often associated with sympathetic activation. We studied the mechanisms triggering these post‐MI arrhythmias in vivo and their relation to regional myocyte remodelling. In pigs with chronic MI (6 weeks), in vivo monophasic action potentials were simultaneously recorded in the peri‐infarct and remote regions during adrenergic stimulation with isoproterenol (isoprenaline; ISO). Sham animals served as controls. During infusion of ISO in vivo, the incidence of delayed afterdepolarizations (DADs) and beat‐to‐beat variability of repolarization (BVR) was higher in the peri‐infarct than in the remote region. Myocytes isolated from the peri‐infarct region, in comparison to myocytes from the remote region, had more DADs, associated with spontaneous Ca2+ release, and a higher incidence of spontaneous action potentials (APs) when exposed to ISO (9.99 ± 4.2 vs. 0.16 ± 0.05 APs/min, p = 0.004); these were suppressed by CaMKII inhibition. Peri‐infarct myocytes also had reduced repolarization reserve and increased BVR (26 ± 10 ms vs. 9 ± 7 ms, P < 0.001), correlating with DAD activity. In contrast to these regional distinctions under ISO, alterations in Ca2+ handling at baseline and myocyte hypertrophy were present throughout the left ventricle (LV). Expression of some of the related genes was, however, different between the regions. In conclusion, altered myocyte adrenergic responses in the peri‐infarct but not the remote region provide a source of triggered activity in vivo and of repolarization instability amplifying the substrate for re‐entry. These findings stimulate further exploration of region‐specific therapies targeting myocytes and autonomic modulation. Ventricular arrhythmias are a major complication after myocardial infarction (MI), associated with sympathetic activation. The structurally heterogeneous peri‐infarct zone is a known substrate, but the functional role of the myocytes is less well known. Recordings of monophasic action potentials in vivo reveal that the peri‐infarct zone is a source of delayed afterdepolarizations (DADs) and has a high beat‐to‐beat variability of repolarization (BVR) during adrenergic stimulation (isoproterenol, ISO). Myocytes isolated from the peri‐infarct region have more DADs and spontaneous action potentials, with spontaneous Ca2+ release, under ISO. These myocytes also have reduced repolarization reserve and increased BVR. Other properties of post‐MI remodelling are present in both peri‐infarct and remote myocytes. These data highlight the importance of altered myocyte adrenergic responses in the peri‐infarct region as source and substrate of post‐MI arrhythmias.
Collapse
Affiliation(s)
- Eef Dries
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Matthew Amoni
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Bert Vandenberk
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Daniel M Johnson
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium.,Institute of Cardiovascular Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Guillaume Gilbert
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Chandan K Nagaraju
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Rosa Doñate Puertas
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Mouna Abdesselem
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Demetrio J Santiago
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium.,Laboratory of Molecular Cardiology, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), C. Melchor Fernández Almagro 3, 28029, Madrid, Spain
| | - H Llewelyn Roderick
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Piet Claus
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Rik Willems
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| | - Karin R Sipido
- Experimental Cardiology, University of Leuven, Herestraat 49 box 911, Leuven, Belgium
| |
Collapse
|
16
|
van den Broek HT, Wenker S, van de Leur R, Doevendans PA, Chamuleau SAJ, van Slochteren FJ, van Es R. 3D Myocardial Scar Prediction Model Derived from Multimodality Analysis of Electromechanical Mapping and Magnetic Resonance Imaging. J Cardiovasc Transl Res 2019; 12:517-527. [PMID: 31338795 PMCID: PMC6854049 DOI: 10.1007/s12265-019-09899-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 07/01/2019] [Indexed: 01/27/2023]
Abstract
Many cardiac catheter interventions require accurate discrimination between healthy and infarcted myocardia. The gold standard for infarct imaging is late gadolinium-enhanced MRI (LGE-MRI), but during cardiac procedures electroanatomical or electromechanical mapping (EAM or EMM, respectively) is usually employed. We aimed to improve the ability of EMM to identify myocardial infarction by combining multiple EMM parameters in a statistical model. From a porcine infarction model, 3D electromechanical maps were 3D registered to LGE-MRI. A multivariable mixed-effects logistic regression model was fitted to predict the presence of infarct based on EMM parameters. Furthermore, we correlated feature-tracking strain parameters to EMM measures of local mechanical deformation. We registered 787 EMM points from 13 animals to the corresponding MRI locations. The mean registration error was 2.5 ± 1.16 mm. Our model showed a strong ability to predict the presence of infarction (C-statistic = 0.85). Strain parameters were only weakly correlated to EMM measures. The model is accurate in discriminating infarcted from healthy myocardium. Unipolar and bipolar voltages were the strongest predictors.
Collapse
Affiliation(s)
| | - Steven Wenker
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Rutger van de Leur
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Pieter A Doevendans
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
- Netherlands Heart Institute, Utrecht, The Netherlands
- CMH, Utrecht, Netherlands
| | - Steven A J Chamuleau
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands.
| | | | - René van Es
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
| |
Collapse
|
17
|
Aziz Z, Shatz D, Raiman M, Upadhyay GA, Beaser AD, Besser SA, Shatz NA, Fu Z, Jiang R, Nishimura T, Liao H, Nayak HM, Tung R. Targeted Ablation of Ventricular Tachycardia Guided by Wavefront Discontinuities During Sinus Rhythm. Circulation 2019; 140:1383-1397. [DOI: 10.1161/circulationaha.119.042423] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Accurate and expedited identification of scar regions most prone to reentry is needed to guide ventricular tachycardia (VT) ablation. We aimed to prospectively assess outcomes of VT ablation guided primarily by the targeting of deceleration zones (DZ) identified by propagational analysis of ventricular activation during sinus rhythm.
Methods:
Patients with scar-related VT were prospectively enrolled in the University of Chicago VT Ablation Registry between 2016 and 2018. Isochronal late activation maps annotated to the latest local electrogram deflection were created with high-density multielectrode mapping catheters. Targeted ablation of DZ (>3 isochrones within 1cm radius) was performed, prioritizing later activated regions with maximal isochronal crowding. When possible, activation mapping of VT was performed, and successful ablation sites were compared with DZ locations for mechanistic correlation. Patients were prospectively followed for VT recurrence and mortality.
Results:
One hundred twenty patients (median age 65 years [59-71], 15% female, 50% nonischemic, median ejection fraction 31%) underwent 144 ablation procedures for scar-related VT. 57% of patients had previous ablation and epicardial access was employed in 59% of cases. High-density mapping during baseline rhythm was performed (2518 points [1615-3752] endocardial, 5049±2580 points epicardial) and identified an average of 2±1 DZ, which colocalized to successful termination sites in 95% of cases. The median total radiofrequency application duration was 29 min (21-38 min) to target DZ, representing ablation of 18% of the low-voltage area. At 12±10 months, 70% freedom from VT recurrence (80% in ischemic cardiomyopathy and 63% in nonischemic cardiomyopathy) was achieved. The overall survival rate was 87%.
Conclusions:
A novel voltage-independent high-density mapping display can identify the functional substrate for VT during sinus rhythm and guide targeted ablation, obviating the need for extensive radiofrequency delivery. Regions with isochronal crowding during the baseline rhythm were predictive of VT termination sites, providing mechanistic evidence that deceleration zones are highly arrhythmogenic, functioning as niduses for reentry.
Collapse
Affiliation(s)
- Zaid Aziz
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | - Dalise Shatz
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | - Michael Raiman
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
- Abbott, Abbott Park, IL (M.R., N.A.S.)
| | - Gaurav A Upadhyay
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | - Andrew D. Beaser
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | - Stephanie A. Besser
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | | | - Zihuan Fu
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | - Ruhong Jiang
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | - Takuro Nishimura
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | - Hongtao Liao
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | - Hemal M. Nayak
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| | - Roderick Tung
- Center for Arrhythmia Care, Pritzker School of Medicine, Department of Medicine, Division of Cardiology, University of Chicago, IL (Z.A., D.S., M.R., G.A.U., A.B., S.A.B., Z.F., R.J., T.N., H.L, H.M.N., R.T.)
| |
Collapse
|
18
|
Trew ML, Engelman ZJ, Caldwell BJ, Lever NA, LeGrice IJ, Smaill BH. Cardiac intramural electrical mapping reveals focal delays but no conduction velocity slowing in the peri-infarct region. Am J Physiol Heart Circ Physiol 2019; 317:H743-H753. [PMID: 31419152 DOI: 10.1152/ajpheart.00154.2019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Altered electrical behavior alongside healed myocardial infarcts (MIs) is associated with increased risk of sudden cardiac death. However, the multidimensional mechanisms are poorly understood and described. This study characterizes, for the first time, the intramural spread of electrical activation in the peri-infarct region of chronic reperfusion MIs. Four sheep were studied 13 wk after antero-apical reperfusion infarction. Extracellular potentials (ECPs) were recorded in a ~20 × 20-mm2 region adjacent to the infarct boundary (25 plunge needles <0.5-mm diameter with 15 electrodes at 1-mm centers) during multisite stimulation. Infarct geometry and electrode locations were reconstructed from magnetic resonance images. Three-dimensional activation spread was characterized by local activation times and interpolated ECP fields (n = 191 records). Control data were acquired in 4 non-infarcted sheep (n = 96 records). Electrodes were distributed uniformly around 15 ± 5% of the intramural infarct boundary. There were marked changes in pacing success and ECP morphology across a functional border zone (BZ) ±2 mm from the boundary. Stimulation adjacent to the infarct boundary was associated with low-amplitude electrical activity within the BZ and delayed activation of surrounding myocardium. Bulk tissue depolarization occurred 3.5-14.6 mm from the pacing site for 39% of stimuli with delays of 4-37 ms, both significantly greater than control (P < 0.0001). Conduction velocity (CV) adjacent to the infarct was not reduced compared with control, consistent with structure-only computer model results. Insignificant CV slowing, irregular stimulus-site specific activation delays, and obvious indirect activation pathways strongly suggest that the substrate for conduction abnormalities in chronic MI is predominantly structural in nature.NEW & NOTEWORTHY Intramural in vivo measurements of peri-infarct electrical activity were not available before this study. We use pace-mapping in a three-dimensional electrode array to show that a subset of stimuli in the peri-infarct region initiates coordinated myocardial activation some distance from the stimulus site with substantial associated time delays. This is site dependent and heterogeneous and occurs for <50% of ectopic stimuli in the border zone. Furthermore, once coordinated activation is initiated, conduction velocity adjacent to the infarct boundary is not significantly different from control. These results give new insights to peri-infarct electrical activity and do not support the widespread view of uniform electrical remodeling in the border zone of chronic myocardial infarcts, with depressed conduction velocity throughout.
Collapse
Affiliation(s)
- Mark L Trew
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Zoar J Engelman
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Bryan J Caldwell
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Nigel A Lever
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.,Auckland Hospital, Auckland, New Zealand
| | - Ian J LeGrice
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.,Department of Physiology, University of Auckland, Auckland, New Zealand
| | - Bruce H Smaill
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.,Department of Physiology, University of Auckland, Auckland, New Zealand
| |
Collapse
|
19
|
Fujino T, Yuzawa H, Shinohara M, Sekiguchi Y, Nogami A, Ikeda T. Transient, Marked ST-Segment Elevation During Successful Epicardial Substrate Ablation in a Patient With Brugada Syndrome. JACC Case Rep 2019; 1:301-305. [PMID: 34316812 PMCID: PMC8288584 DOI: 10.1016/j.jaccas.2019.06.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/22/2019] [Accepted: 06/26/2019] [Indexed: 11/18/2022]
Abstract
A 37-year-old man with Brugada syndrome and frequent appropriate implantable cardioverter-defibrillator shocks received an epicardial substrate ablation. During the procedure to eliminate delayed potentials, transient, marked ST-segment elevation in lead V2 was observed, particularly in the anterior right ventricle with a borderline between normal and low-voltage areas. (Level of Difficulty: Intermediate.).
Collapse
Key Words
- 3-dimensional imaging
- BrS, Brugada syndrome
- CRBBB, right bundle branch block
- DP, delayed potential
- ECG, electrocardiogram
- ICD, implantable cardioverter-defibrillator
- LP, late potential
- RF, radiofrequency
- RFA, radiofrequency ablation
- RV, right ventricular
- RVOT, right ventricular outflow tract
- VF, ventricular fibrillation
- ablation
- electroanatomic mapping
- electrocardiogram
- ventricular fibrillation
Collapse
Affiliation(s)
- Tadashi Fujino
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
- Address for correspondence: Dr. Tadashi Fujino, Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, 6-11-1 Omorinishi, Ota-ku, Tokyo 143-8541, Japan.
| | - Hitomi Yuzawa
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Masaya Shinohara
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Yukio Sekiguchi
- Cardiovascular Division, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Akihiko Nogami
- Cardiovascular Division, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| |
Collapse
|
20
|
Lopez EM, Malhotra R. Ventricular Tachycardia in Structural Heart Disease. J Innov Card Rhythm Manag 2019; 10:3762-3773. [PMID: 32477742 PMCID: PMC7252751 DOI: 10.19102/icrm.2019.100801] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 11/26/2018] [Indexed: 02/07/2023] Open
Abstract
Patients with structural heart disease (SHD) are at risk of ventricular tachycardia (VT), which can be difficult to manage clinically. Many treatment options are currently available, but no single approach can be applied with 100% perfect results; often, a combination of therapies is required to achieve good control of ventricular arrhythmias. Coronary artery disease with previous myocardial infarction (MI) is the most common form of SHD presenting with VT, with scar-mediated reentry being the predominant mechanism. Other cardiomyopathies such as arrhythmogenic right ventricular cardiomyopathy, sarcoidosis, Chagas disease, and repaired congenital heart disease can also present in conjunction with ventricular arrhythmias. A thorough analysis of the patient’s history, 12-lead electrocardiogram, and imaging findings are essential for understanding the mechanism and guiding localization of the site of origin of the arrhythmia and the presence of underlying heart disease, which will improve outcomes following catheter ablation if such is indicated. Separately, antiarrhythmic drugs have not been shown to decrease mortality in this patient population but can help to reduce the VT burden and subsequently the need for implantable cardioverter-defibrillator therapy. Unfortunately, most antiarrhythmic agents are negative inotropes, with the possibility of worsening heart failure. This review aims to discuss the current options available for the management of VT in SHD.
Collapse
Affiliation(s)
- Eliany Mejia Lopez
- Cardiac Electrophysiology Department, Cardiovascular Division, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
| | - Rohit Malhotra
- Cardiac Electrophysiology Department, Cardiovascular Division, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
| |
Collapse
|
21
|
Cronin EM, Bogun FM, Maury P, Peichl P, Chen M, Namboodiri N, Aguinaga L, Leite LR, Al-Khatib SM, Anter E, Berruezo A, Callans DJ, Chung MK, Cuculich P, d'Avila A, Deal BJ, Della Bella P, Deneke T, Dickfeld TM, Hadid C, Haqqani HM, Kay GN, Latchamsetty R, Marchlinski F, Miller JM, Nogami A, Patel AR, Pathak RK, Saenz Morales LC, Santangeli P, Sapp JL, Sarkozy A, Soejima K, Stevenson WG, Tedrow UB, Tzou WS, Varma N, Zeppenfeld K. 2019 HRS/EHRA/APHRS/LAHRS expert consensus statement on catheter ablation of ventricular arrhythmias. Heart Rhythm 2019; 17:e2-e154. [PMID: 31085023 PMCID: PMC8453449 DOI: 10.1016/j.hrthm.2019.03.002] [Citation(s) in RCA: 186] [Impact Index Per Article: 37.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Indexed: 01/10/2023]
Abstract
Ventricular arrhythmias are an important cause of morbidity and mortality and come in a variety of forms, from single premature ventricular complexes to sustained ventricular tachycardia and fibrillation. Rapid developments have taken place over the past decade in our understanding of these arrhythmias and in our ability to diagnose and treat them. The field of catheter ablation has progressed with the development of new methods and tools, and with the publication of large clinical trials. Therefore, global cardiac electrophysiology professional societies undertook to outline recommendations and best practices for these procedures in a document that will update and replace the 2009 EHRA/HRS Expert Consensus on Catheter Ablation of Ventricular Arrhythmias. An expert writing group, after reviewing and discussing the literature, including a systematic review and meta-analysis published in conjunction with this document, and drawing on their own experience, drafted and voted on recommendations and summarized current knowledge and practice in the field. Each recommendation is presented in knowledge byte format and is accompanied by supportive text and references. Further sections provide a practical synopsis of the various techniques and of the specific ventricular arrhythmia sites and substrates encountered in the electrophysiology lab. The purpose of this document is to help electrophysiologists around the world to appropriately select patients for catheter ablation, to perform procedures in a safe and efficacious manner, and to provide follow-up and adjunctive care in order to obtain the best possible outcomes for patients with ventricular arrhythmias.
Collapse
Affiliation(s)
| | | | | | - Petr Peichl
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Minglong Chen
- Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Narayanan Namboodiri
- Sree Chitra Institute for Medical Sciences and Technology, Thiruvananthapuram, India
| | | | | | | | - Elad Anter
- Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | | | | | | | | | - Andre d'Avila
- Hospital Cardiologico SOS Cardio, Florianopolis, Brazil
| | - Barbara J Deal
- Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | | | | | | | - Claudio Hadid
- Hospital General de Agudos Cosme Argerich, Buenos Aires, Argentina
| | - Haris M Haqqani
- University of Queensland, The Prince Charles Hospital, Chermside, Australia
| | - G Neal Kay
- University of Alabama at Birmingham, Birmingham, Alabama
| | | | | | - John M Miller
- Indiana University School of Medicine, Krannert Institute of Cardiology, Indianapolis, Indiana
| | | | - Akash R Patel
- University of California San Francisco Benioff Children's Hospital, San Francisco, California
| | | | | | | | - John L Sapp
- Queen Elizabeth II Health Sciences Centre, Halifax, Canada
| | - Andrea Sarkozy
- University Hospital Antwerp, University of Antwerp, Antwerp, Belgium
| | | | | | | | | | | | | |
Collapse
|
22
|
Abstract
PURPOSE OF REVIEW This review aims to describe the latest advances in autonomic neuromodulation approaches to treating cardiac arrhythmias, with a focus on ventricular arrhythmias. RECENT FINDINGS The increasing understanding of neuronal remodeling in cardiac diseases has led to the development and improvement of novel neuromodulation therapies targeting multiple levels of the autonomic nervous system. Thoracic epidural anesthesia, spinal cord stimulation, stellate ganglion modulatory therapies, vagal stimulation, renal denervation, and interventions on the intracardiac nervous system have all been studied in preclinical models, with encouraging preliminary clinical data. The autonomic nervous system regulates all the electrical processes of the heart and plays an important role in the pathophysiology of cardiac arrhythmias. Despite recent advances in the clinical application of cardiac neuromodulation, our comprehension of the anatomy and function of the cardiac autonomic nervous system is still limited. Hopefully in the near future, more preclinical data combined with larger clinical trials will lead to further improvements in neuromodulatory treatment for heart rhythm disorders.
Collapse
|
23
|
Kitamura T, Martin CA, Vlachos K, Martin R, Frontera A, Takigawa M, Thompson N, Cheniti G, Massouille G, Lam A, Bourier F, Duchateau J, Pambrun T, Denis A, Derval N, Hocini M, HaÏssaguerre M, Cochet H, JaÏs P, Sacher F. Substrate Mapping and Ablation for Ventricular Tachycardia in Patients with Structural Heart Disease: How to Identify Ventricular Tachycardia Substrate. J Innov Card Rhythm Manag 2019; 10:3565-3580. [PMID: 32477720 PMCID: PMC7252795 DOI: 10.19102/icrm.2019.100302] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 08/20/2018] [Indexed: 01/02/2023] Open
Abstract
Catheter ablation for ventricular tachycardia (VT) has been increasingly used over the past two decades in patients with structural heart disease (SHD). In these individuals, a substrate mapping strategy is being more commonly applied to identify targets for VT ablation, which has been shown to be more effective versus targeting mappable VTs alone. There are a number of substrate mapping methods in existence that aim to explore potential VT isthmuses, although their success rates vary. Most of the reported electrogram-based mapping studies have been performed with ablation catheters; meanwhile, the use of multipolar mapping catheters with smaller electrodes and closer interelectrode spacing has emerged, which allows for an assessment of detailed near-field abnormal electrograms at a higher resolution. Another recent advancement has occurred in the use of imaging techniques in VT ablation, particularly in refining the substrate. The goal of this paper is to review the key developments and limitations of current mapping strategies of substrate-based VT ablation and their outcomes. In addition, we briefly summarize the role of cardiac imaging in delineating VT substrate.
Collapse
Affiliation(s)
- Takeshi Kitamura
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France.,Tokyo Metropolitan Hiroo Hospital, Tokyo, Japan
| | - Claire A Martin
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France.,Royal Papworth Hospital NHS Foundation Trust, Cambridge, UK
| | - Konstantinos Vlachos
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Ruairidh Martin
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France.,Newcastle University, Newcastle-upon-Tyne, UK
| | - Antonio Frontera
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France.,San Raffaele Hospital, Milan, Italy
| | - Masateru Takigawa
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Nathaniel Thompson
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Ghassen Cheniti
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Gregoire Massouille
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Anna Lam
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Felix Bourier
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Josselin Duchateau
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Thomas Pambrun
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Arnaud Denis
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Nicolas Derval
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Meleze Hocini
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Michel HaÏssaguerre
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Hubert Cochet
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Pierre JaÏs
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| | - Frédéric Sacher
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac-Bordeaux, France.,Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.,Centre de recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, Bordeaux, France
| |
Collapse
|
24
|
Gibbs T, Villa A, Sammut E, Jeyabraba S, Carr-White G, Ismail T, Mullen G, Ganeshan B, Chiribiri A. Quantitative assessment of myocardial scar heterogeneity using cardiovascular magnetic resonance texture analysis to risk stratify patients post-myocardial infarction. Clin Radiol 2018; 73:1059.e17-1059.e26. [DOI: 10.1016/j.crad.2018.08.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 08/26/2018] [Indexed: 01/21/2023]
|
25
|
Acosta J, Andreu D, Penela D, Cabrera M, Carlosena A, Korshunov V, Vassanelli F, Borras R, Martínez M, Fernández-Armenta J, Linhart M, Tolosana JM, Mont L, Berruezo A. Elucidation of hidden slow conduction by double ventricular extrastimuli: a method for further arrhythmic substrate identification in ventricular tachycardia ablation procedures. Europace 2018; 20:337-346. [PMID: 28017938 DOI: 10.1093/europace/euw325] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/21/2016] [Indexed: 11/12/2022] Open
Abstract
Aims Identification of local abnormal electrograms (EGMs) during ventricular tachycardia substrate ablation (VTSA) is challenging when they are hidden within the far-field signal. This study analyses whether the response to a double ventricular extrastimulus during substrate mapping could identify slow conducting areas that are hidden during sinus rhythm. Methods and results Consecutive patients (n = 37) undergoing VTSA were prospectively included. Bipolar EGMs with >3 deflections and duration <133 ms were considered as potential hidden slow conduction EGMs (HSC-EGM) if located within/surrounding the scar area. Whenever a potential HSC-EGM was identified, a double ventricular extrastimulus was delivered. If the local potential delayed, it was annotated as HSC-EGM. The incidence of HSC-EGM in core, border-zone, and normal-voltage regions was determined. Ablation was delivered at conducting channel entrances and HSC-EGMs. VT inducibility after VTSA obtained was compared with data from a historic control group. 2417 EGMs were analyzed. 575 (23.7%) qualified as potential HSC-EGM, and 198 of them were tagged as HSC-EGMs. Scars in patients with HSC-EGMs (n = 21, 56.7%) were smaller (35.424.7 vs 67.639.1 cm2; P = 0.006) and more heterogeneous (core/scar area ratio 0.250.2 vs 0.450.19; P = 0.02). 28.8% of HSC-EGMs were located in normal-voltage tissue; 81.3% were targeted for ablation. Patients undergoing VTSA incorporating HSC analysis needed less radiofrequency time (17.411 vs 2310.7 minutes; P = 0.016) and had a lower rate of VT inducibility after VTSA than the historic controls (24.3% vs 50%; P = 0.018). Conclusion Ventricular tachycardia substrate ablation incorporating HSC analysis allowed further arrhythmic substrate identification (especially in normal-voltage areas) and reduced RF time and VT inducibility after VTSA.
Collapse
Affiliation(s)
- Juan Acosta
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - David Andreu
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Diego Penela
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Mario Cabrera
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Alicia Carlosena
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Viatcheslav Korshunov
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Francesca Vassanelli
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Roger Borras
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Mikel Martínez
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Juan Fernández-Armenta
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Markus Linhart
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - José M Tolosana
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Lluis Mont
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| | - Antonio Berruezo
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), C/Villarroel 170, 08036 Barcelona, Catalonia, Spain
| |
Collapse
|
26
|
Prakosa A, Arevalo HJ, Deng D, Boyle PM, Nikolov PP, Ashikaga H, Blauer JJE, Ghafoori E, Park CJ, Blake RC, Han FT, MacLeod RS, Halperin HR, Callans DJ, Ranjan R, Chrispin J, Nazarian S, Trayanova NA. Personalized virtual-heart technology for guiding the ablation of infarct-related ventricular tachycardia. Nat Biomed Eng 2018; 2:732-740. [PMID: 30847259 PMCID: PMC6400313 DOI: 10.1038/s41551-018-0282-2] [Citation(s) in RCA: 160] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 07/27/2018] [Indexed: 11/08/2022]
Abstract
Ventricular tachycardia (VT), which can lead to sudden cardiac death, occurs frequently in patients with myocardial infarction. Catheter-based radiofrequency ablation of cardiac tissue has achieved only modest efficacy, owing to the inaccurate identification of ablation targets by current electrical mapping techniques, which can lead to extensive lesions and to a prolonged, poorly tolerated procedure. Here we show that personalized virtual-heart technology based on cardiac imaging and computational modelling can identify optimal infarct-related VT ablation targets in retrospective animal (5 swine) and human studies (21 patients) and in a prospective feasibility study (5 patients). We first assessed in retrospective studies (one of which included a proportion of clinical images with artifacts) the capability of the technology to determine the minimum-size ablation targets for eradicating all VTs. In the prospective study, VT sites predicted by the technology were targeted directly, without relying on prior electrical mapping. The approach could improve infarct-related VT ablation guidance, where accurate identification of patient-specific optimal targets could be achieved on a personalized virtual heart prior to the clinical procedure.
Collapse
Affiliation(s)
- Adityo Prakosa
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Hermenegild J Arevalo
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
- Cardiac Modelling Department, Simula Research Laboratory, Fornebu, Norway
| | - Dongdong Deng
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Patrick M Boyle
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Plamen P Nikolov
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Hiroshi Ashikaga
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Joshua J E Blauer
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
| | - Elyar Ghafoori
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
| | - Carolyn J Park
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Robert C Blake
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Frederick T Han
- University of Utah Health Sciences Center, Salt Lake City, UT, USA
| | - Rob S MacLeod
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
| | - Henry R Halperin
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - David J Callans
- Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Ravi Ranjan
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
| | - Jonathan Chrispin
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Saman Nazarian
- Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Natalia A Trayanova
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA.
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| |
Collapse
|
27
|
Kung GL, Vaseghi M, Gahm JK, Shevtsov J, Garfinkel A, Shivkumar K, Ennis DB. Microstructural Infarct Border Zone Remodeling in the Post-infarct Swine Heart Measured by Diffusion Tensor MRI. Front Physiol 2018; 9:826. [PMID: 30246802 PMCID: PMC6113632 DOI: 10.3389/fphys.2018.00826] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 06/12/2018] [Indexed: 12/14/2022] Open
Abstract
Introduction: Computational models of the heart increasingly require detailed microstructural information to capture the impact of tissue remodeling on cardiac electromechanics in, for example, hearts with myocardial infarctions. Myocardial infarctions are surrounded by the infarct border zone (BZ), which is a site of electromechanical property transition. Magnetic resonance imaging (MRI) is an emerging method for characterizing microstructural remodeling and focal myocardial infarcts and the BZ can be identified with late gadolinium enhanced (LGE) MRI. Microstructural remodeling within the BZ, however, remains poorly characterized by MRI due, in part, to the fact that LGE and DT-MRI are not always available for the same heart. Diffusion tensor MRI (DT-MRI) can evaluate microstructural remodeling by quantifying the DT apparent diffusion coefficient (ADC, increased with decreased cellularity), fractional anisotropy (FA, decreased with increased fibrosis), and tissue mode (decreased with increased fiber disarray). The purpose of this work was to use LGE MRI in post-infarct porcine hearts (N = 7) to segment remote, BZ, and infarcted myocardium, thereby providing a basis to quantify microstructural remodeling in the BZ and infarcted regions using co-registered DT-MRI. Methods: Chronic porcine infarcts were created by balloon occlusion of the LCx. 6-8 weeks post-infarction, MRI contrast was administered, and the heart was potassium arrested, excised, and imaged with LGE MRI (0.33 × 0.33 × 0.33 mm) and co-registered DT-MRI (1 × 1 × 3 mm). Myocardium was segmented as remote, BZ, or infarct by LGE signal intensity thresholds. DT invariants were used to evaluate microstructural remodeling by quantifying ADC, FA, and tissue mode. Results: The BZ significantly remodeled compared to both infarct and remote myocardium. BZ demonstrated a significant decrease in cellularity (increased ADC), significant decrease in tissue organization (decreased FA), and a significant increase in fiber disarray (decreased tissue mode) relative to remote myocardium (all p < 0.05). Microstructural remodeling in the infarct was similar, but significantly larger in magnitude (all p < 0.05). Conclusion: DT-MRI can identify regions of significant microstructural remodeling in the BZ that are distinct from both remote and infarcted myocardium.
Collapse
Affiliation(s)
- Geoffrey L Kung
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, United States
| | - Marmar Vaseghi
- Cardiac Arrhythmia Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Medicine (Cardiology), David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Jin K Gahm
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Computer Science, University of California, Los Angeles, Los Angeles, CA, United States
| | - Jane Shevtsov
- Department of Medicine (Cardiology), David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Alan Garfinkel
- Department of Medicine (Cardiology), David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Kalyanam Shivkumar
- Cardiac Arrhythmia Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Medicine (Cardiology), David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Daniel B Ennis
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, United States.,Biomedical Physics Interdepartmental Program, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| |
Collapse
|
28
|
Meng L, Shivkumar K, Ajijola O. Autonomic Regulation and Ventricular Arrhythmias. CURRENT TREATMENT OPTIONS IN CARDIOVASCULAR MEDICINE 2018; 20:38. [DOI: 10.1007/s11936-018-0633-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
29
|
Surgical treatment for endocardial radiofrequency ablation-resistant sustained monomorphic ventricular tachycardia with mural thrombus including dense calcification in the left ventricle. Gen Thorac Cardiovasc Surg 2017; 66:471-475. [PMID: 29188428 DOI: 10.1007/s11748-017-0853-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 10/19/2017] [Indexed: 12/26/2022]
Abstract
Catheter ablation provides effective results for sustained monomorphic ventricular tachycardia (VT), but the presence of mural thrombus including dense calcification occasionally causes unfavorable outcomes. The case of a 67-year-old man in whom sustained monomorphic VT, which was resistant to endocardial radiofrequency ablation, in the presence of mural thrombus including dense calcification after coronary artery bypass grafting was successfully treated by left ventricular reconstruction with cryoablation is reported.
Collapse
|
30
|
Samanta R, Kumar S, Chik W, Qian P, Barry MA, Al Raisi S, Bhaskaran A, Farraha M, Nadri F, Kizana E, Thiagalingam A, Kovoor P, Pouliopoulos J. Influence of Intramyocardial Adipose Tissue on the Accuracy of Endocardial Contact Mapping of the Chronic Myocardial Infarction Substrate. Circ Arrhythm Electrophysiol 2017; 10:CIRCEP.116.004998. [PMID: 29038101 DOI: 10.1161/circep.116.004998] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 08/17/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND Recent studies have demonstrated that intramyocardial adipose tissue (IMAT) may contribute to ventricular electrophysiological remodeling in patients with chronic myocardial infarction. Using an ovine model of myocardial infarction, we aimed to determine the influence of IMAT on scar tissue identification during endocardial contact mapping and optimal voltage-based mapping criteria for defining IMAT dense regions. METHOD AND RESULTS In 7 sheep, left ventricular endocardial and transmural mapping was performed 84 weeks (15-111 weeks) post-myocardial infarction. Spearman rank correlation coefficient was used to assess the relationship between endocardial contact electrogram amplitude and histological composition of myocardium. Receiver operator characteristic curves were used to derive optimal electrogram thresholds for IMAT delineation during endocardial mapping and to describe the use of endocardial mapping for delineation of IMAT dense regions within scar. Endocardial electrogram amplitude correlated significantly with IMAT (unipolar r=-0.48±0.12, P<0.001; bipolar r=-0.45±0.22, P=0.04) but not collagen (unipolar r=-0.36±0.24, P=0.13; bipolar r=-0.43±0.31, P=0.16). IMAT dense regions of myocardium reliably identified using endocardial mapping with thresholds of <3.7 and <0.6 mV, respectively, for unipolar, bipolar, and combined modalities (single modality area under the curve=0.80, P<0.001; combined modality area under the curve=0.84, P<0.001). Unipolar mapping using optimal thresholding remained significantly reliable (area under the curve=0.76, P<0.001) during mapping of IMAT, confined to putative scar border zones (bipolar amplitude, 0.5-1.5 mV). CONCLUSIONS These novel findings enhance our understanding of the confounding influence of IMAT on endocardial scar mapping. Combined bipolar and unipolar voltage mapping using optimal thresholds may be useful for delineating IMAT dense regions of myocardium, in postinfarct cardiomyopathy.
Collapse
Affiliation(s)
- Rahul Samanta
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Saurabh Kumar
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - William Chik
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Pierre Qian
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Michael A Barry
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Sara Al Raisi
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Abhishek Bhaskaran
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Melad Farraha
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Fazlur Nadri
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Eddy Kizana
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Aravinda Thiagalingam
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Pramesh Kovoor
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.)
| | - Jim Pouliopoulos
- From the Department of Cardiology, Westmead Hospital, New South Wales, Australia (R.S., S.K., W.C., P.Q., M.A.B., S.A.R., A.B., F.N., E.K., A.T., P.K., J.P.); and Sydney Medical School, University of Sydney, Australia (R.S., W.C., S.A.R., A.B., M.F., E.K., A.T., P.K., J.P.).
| |
Collapse
|
31
|
Xu B, Xu H, Cao H, Liu X, Qin C, Zhao Y, Han X, Li H. Intermedin improves cardiac function and sympathetic neural remodeling in a rat model of post myocardial infarction heart failure. Mol Med Rep 2017. [PMID: 28627670 PMCID: PMC5562092 DOI: 10.3892/mmr.2017.6776] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Emerging evidence has suggested that intermedin (IMD), a novel member of the calcitonin gene-related peptide (CGRP) family, has a wide range of cardioprotective effects. The present study investigated the effects of long-term administration of IMD on cardiac function and sympathetic neural remodeling in heart failure (HF) rats, and studied potential underlying mechanism. HF was induced in rats by myocardial infarction (MI). Male Sprague Dawley rats were randomly assigned to either saline or IMD (0.6 µg/kg/h) treatment groups for 4 weeks post-MI. Another group of sham-operated rats served as controls. Cardiac function was assessed by echocardiography, cardiac catheterization and plasma level of B-type natriuretic peptide (BNP). Cardiac sympathetic neural remodeling was assessed by immunohistochemistical study of tyrosine hydroxylase (TH) and growth associated protein 43 (GAP43) immunoreactive nerve fibers. The protein expression levels of nerve growth factor (NGF), TH and GAP43 in the ventricular myocardium were studied by western blotting. Ventricular fibrillation threshold (VFT) was determined to evaluate the incidence of ventricular arrhythmia. Oxidative stress was assessed by detecting the activity of superoxide dismutase and the level of malondialdehyde. Compared with rats administrated with saline, IMD significantly improved cardiac function, decreased the plasma BNP level, attenuated sympathetic neural remodeling, increased VFT and suppressed oxidative stress. In conclusion, these results indicated that IMD prevents ventricle remodeling and improves the performance of a failing heart. In addition, IMD attenuated sympathetic neural remodeling and reduced the incidence of ventricular arrhythmia, which may contribute to its anti-oxidative property. These results implicate IMD as a potential therapeutic agent for the treatment of HF.
Collapse
Affiliation(s)
- Bin Xu
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Hao Xu
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Heng Cao
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Xiaoxiao Liu
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Chunhuan Qin
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Yanzhou Zhao
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Xiaolin Han
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Hongli Li
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| |
Collapse
|
32
|
Sakamoto K, Nozoe M, Tsutsui Y, Suematsu N, Kubota T, Okabe M, Yamamoto Y. Successful bipolar ablation for ventricular tachycardia with potential substrate identification by pre-procedural cardiac magnetic resonance imaging. Int Med Case Rep J 2017; 10:167-171. [PMID: 28546773 PMCID: PMC5436767 DOI: 10.2147/imcrj.s135952] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Cardiac magnetic resonance imaging (MRI) is a useful tool for detecting the arrhythmogenic substrate in cardiac sarcoidosis. We herein present a case of bipolar radiofrequency catheter ablation for ventricular tachycardia (VT) complicated with cardiac sarcoidosis, guided by pre-procedural cardiac MRI. Neither echocardiography nor endocardial voltage mapping suggested a septal VT substrate. However, MRI alone detected intramural lesions in the septum. Although application of endocardial energy failed to treat the VT, bipolar ablation targeting the potential substrate identified by MRI successfully eliminated the VT. Even when no abnormalities are depicted on echocardiography and endocardial voltage mapping, intramural scar tissue identified by cardiac MRI could be critical for VT.
Collapse
Affiliation(s)
- Kazuo Sakamoto
- Division of Cardiology, Cardiovascular and Aortic Center, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| | - Masatsugu Nozoe
- Division of Cardiology, Cardiovascular and Aortic Center, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| | - Yoshitomo Tsutsui
- Division of Cardiology, Cardiovascular and Aortic Center, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| | - Nobuhiro Suematsu
- Division of Cardiology, Cardiovascular and Aortic Center, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| | - Toru Kubota
- Division of Cardiology, Cardiovascular and Aortic Center, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| | - Masanori Okabe
- Division of Cardiology, Cardiovascular and Aortic Center, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| | - Yusuke Yamamoto
- Division of Cardiology, Cardiovascular and Aortic Center, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| |
Collapse
|
33
|
ITOH TAIHEI, YAMADA TAKUMI. Excellent Pace Maps Recorded from Two Remote Sites Inside and Outside the Scar in a Patient with Ischemic VT: What Is the Mechanism? Pacing Clin Electrophysiol 2017; 40:72-74. [DOI: 10.1111/pace.13002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 11/27/2016] [Accepted: 12/11/2016] [Indexed: 11/29/2022]
Affiliation(s)
- TAIHEI ITOH
- Division of Cardiovascular Disease; University of Alabama at Birmingham; Birmingham Alabama
| | - TAKUMI YAMADA
- Division of Cardiovascular Disease; University of Alabama at Birmingham; Birmingham Alabama
| |
Collapse
|
34
|
Sonoda K, Okumura Y, Watanabe I, Nagashima K, Mano H, Kogawa R, Yamaguchi N, Takahashi K, Iso K, Ohkubo K, Nakai T, Kunimoto S, Hirayama A. Scar characteristics derived from two- and three-dimensional reconstructions of cardiac contrast-enhanced magnetic resonance images: Relationship to ventricular tachycardia inducibility and ablation success. J Arrhythm 2016; 33:447-454. [PMID: 29021848 PMCID: PMC5634683 DOI: 10.1016/j.joa.2016.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/26/2016] [Accepted: 11/15/2016] [Indexed: 11/25/2022] Open
Abstract
Background The relationship between cardiac contrast-enhanced magnetic resonance imaging (CE-MRI)-derived scar characteristics and substrate for ventricular tachycardia (VT) in patients with structural heart disease (SHD) has not been fully investigated. Methods This study included 51 patients (mean age, 63.3±15.1 years) who underwent CE-MRI with SHD and VT induction testing before ablation. Late gadolinium-enhanced (LGE) regions on MRI slices were quantified by thresholding techniques. Signal intensities (SIs) 2–6 SDs above the mean SI of the remote left ventricular (LV) myocardium were considered as scar border zones, and SI>6 SDs, as scar zone, and the scar characteristics related to VT inducibility and successful ablation via endocardial approaches were evaluated. Results The proportion of the total CE-MRI-derived scar border zone in the inducible VT group was significantly greater than that in the non-inducible VT group (26.3±9.9% vs. 19.2±7.8%, respectively, P=0.0323). The LV endocardial scar zone to total LV myocardial scar zone ratio in patients whose ablation was successful was significantly greater than that in those whose ablation was unsuccessful (0.61±0.11 vs. 0.48±0.12, respectively, P=0.0042). Most successful ablation sites were located adjacent to CE-MRI-derived scar border zones. Conclusions By CE-MRI, we were able to characterize not only the scar, but also its location and heterogeneity, and those features seemed to be related to VT inducibility and successful ablation from an endocardial site.
Collapse
|
35
|
Recent advances in ablation of ventricular tachycardia associated with structural heart disease: overcoming the challenges of functional and fixed barriers. Curr Opin Cardiol 2016; 31:64-71. [PMID: 26627313 DOI: 10.1097/hco.0000000000000242] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
PURPOSE OF REVIEW Ablation of ventricular tachycardia in structural heart disease has evolved to include techniques to ablate the myocardial substrate in sinus rhythm for ventricular tachycardias that are noninducible or hemodynamically unstable. The intricacies of the complex functional and fixed components of the myocardial scar involved in the arrhythmic mechanisms require careful consideration in identifying targets for substrate ablation identified in sinus rhythm. RECENT FINDINGS The substrate ablation approach referred to as 'scar homogenization' aims to thoroughly abolish any abnormal electrical activity inside the scar. However, this extensive approach may target bystander abnormal activity that is not necessarily related to arrhythmias. Recently, different substrate ablation strategies have been developed to more selectively target areas of the scar responsible for ventricular tachycardia. New technologies have also been introduced to provide offline analysis of the electroanatomical substrate, and to improve high-density mapping of the myocardial scar. SUMMARY Recent advances have improved the ability to ablate ventricular tachycardia using techniques that allow targeting the responsible myocardial substrate while in sinus rhythm. Further research using higher-density mapping with more sophisticated online and offline analysis will aid in the assessment of the complex arrhythmogenicity of the scar and improve efficacy of ventricular tachycardia ablation.
Collapse
|
36
|
|
37
|
Proietti R, Roux JF, Verma A, Alturki A, Bernier ML, Essebag V. A Historical Perspective on the Role of Functional Lines of Block in the Re-entrant Circuit of Ventricular Tachycardia. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2016; 39:490-6. [PMID: 26852719 DOI: 10.1111/pace.12827] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/13/2016] [Accepted: 01/25/2016] [Indexed: 12/29/2022]
Abstract
The ablation strategy for ventricular tachycardia (VT) rapidly evolved from an entrainment mapping approach for identification of the critical isthmus of the re-entrant circuit during monomorphic VT, toward a substrate-based approach aiming to ablate surrogate markers of the circuit during sinus rhythm in hemodynamically nontolerated and polymorphic VT. The latter approach implies an assumption that the circuits responsible for the arrhythmia are anatomical or fixed, and present during sinus rhythm. Accordingly, the lines of block delimiting the channels of the circuits are often considered fixed, although there is evidence that they are functional or more frequently a combination of fixed and functional. The electroanatomical substrate-based approach to VT ablation performed during sinus rhythm is increasingly adopted in clinical practice and often described as scar homogenization, scar dechanneling, or core isolation. However, whether the surrogate markers of the VT circuit during sinus rhythm match the circuit during arrhythmias remains to be fully demonstrated. The myocardial scar is a heterogeneous electrophysiological milieu with complex arrhythmogenic mechanisms that potentially coexist simultaneously. Moreover, the scar consists of different areas of diverse refractoriness and conduction. It can be misleading to limit the arrhythmogenic perspective of the myocardial scar to fixed or anatomical barriers held responsible for the re-entry circuit. Greater understanding of the role of functional lines of block in VT and the validity of the surrogate targets being ablated is necessary to further improve the technique and outcome of VT ablation.
Collapse
Affiliation(s)
- Riccardo Proietti
- McGill University Health Center, Montreal, Quebec, Canada.,Cardiology Department, Luigi Sacco Hospital, Milan, Italy
| | - Jean-Francois Roux
- McGill University Health Center, Montreal, Quebec, Canada.,Centre Hospitalier Universite de Sherbrooke, Quebec, Canada
| | - Atul Verma
- McGill University Health Center, Montreal, Quebec, Canada.,Southlake Regional Health Centre, Newmarket, Ontario, Canada
| | - Ahmed Alturki
- McGill University Health Center, Montreal, Quebec, Canada
| | | | - Vidal Essebag
- McGill University Health Center, Montreal, Quebec, Canada.,Hôpital Sacré-Coeur de Montréal, Montreal, Quebec, Canada
| |
Collapse
|
38
|
Roten L, Sacher F, Daly M, Pascale P, Komatsu Y, Ramoul K, Scherr D, Chaumeil A, Shah A, Denis A, Derval N, Hocini M, Haïssaguerre M, Jaïs P. Epicardial Ventricular Tachycardia Ablation for Which Patients? Arrhythm Electrophysiol Rev 2016; 1:39-45. [PMID: 26835028 DOI: 10.15420/aer.2012.1.39] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
With the widespread use of implantable cardioverter-defibrillators, an increasing number of patients present with ventricular tachycardia (VT). Large multicentre studies have shown that ablation of VT successfully reduces recurrent VT and this procedure is being performed by an increasing number of centres. However, for a number of reasons, many patients experience VT recurrence after ablation. One important reason for VT recurrence is the presence of an epicardial substrate involved in the VT circuit which is not affected by endocardial ablation. Epicardial access and ablation is now frequently performed either after failed endocardial VT ablation or as first-line treatment in selected patients. This review will focus on the available evidence for identifying VT of epicardial origin, and discuss in which patients an epicardial approach would be benefitial.
Collapse
Affiliation(s)
- Laurent Roten
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Frédéric Sacher
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Matthew Daly
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Patrizio Pascale
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Yuki Komatsu
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Khaled Ramoul
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Daniel Scherr
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Arnaud Chaumeil
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Ashok Shah
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Arnaud Denis
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Nicolas Derval
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Mélèze Hocini
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Michel Haïssaguerre
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| | - Pierre Jaïs
- Hôpital Cardiologique du Haut-Lévêque and the Université Victor Segalen Bordeaux II, Bordeaux, France
| |
Collapse
|
39
|
Proietti R, Joza J, Essebag V. Therapy for ventricular arrhythmias in structural heart disease: a multifaceted challenge. J Physiol 2016; 594:2431-43. [PMID: 26621333 DOI: 10.1113/jp270534] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 11/19/2015] [Indexed: 01/25/2023] Open
Abstract
The unpredictable nature and potentially catastrophic consequences of ventricular arrhythmias (VAs) have obligated physicians to search for therapies to prevent sudden cardiac death (SCD). At present, a low left ventricular ejection fraction (LVEF) has been used as a risk factor to predict SCD in patients with structural heart disease and has been consistently adopted as the predominant, and sometimes sole, indication for implantable cardioverter defibrillator (ICD) therapy. Although the ICD remains the mainstay life-saving therapy for SCD, it does not modify the underlying arrhythmic substrate and may be associated with adverse effects from perioperative and long-term complications. Preventative pharmacological therapy has been associated with limited benefits, but anti-arrhythmic medications have significant side effects profiles. Catheter ablation of VAs has greatly evolved over the last few decades. Substrate mapping in sinus rhythm has allowed haemodynamically unstable VAs to be successfully treated. Both LVEF as an indication for ICD therapy and electro-anatomical mapping for substrate modification identify static components of underlying myocardial arrhythmogenicity. They do not take into account dynamic factors, such as the mechanisms of arrhythmia initiation and development of new anatomical or functional lines of block, leading to the initiation and maintenance of VAs. Dynamic factors are difficult to evaluate and consequently are not routinely used in clinical practice to guide treatment. However, progress in the treatment of VAs should consider and integrate dynamic factors with static components to fully characterize the myocardial arrhythmic substrate.
Collapse
Affiliation(s)
- Riccardo Proietti
- McGill University Health Centre, Montreal, Quebec, Canada.,Cardiology Departments, Luigi Sacco Hospital, Milan, Italy
| | | | - Vidal Essebag
- McGill University Health Centre, Montreal, Quebec, Canada.,Hôpital Sacré-Coeur de Montréal, Montreal, Quebec, Canada
| |
Collapse
|
40
|
Kim JY, Shin WS, Kim TS, Kim SH, Kim JH, Jang SW, Pak HN, Nam GB, Lee MY, Rho TH, Oh YS. Visualization of the Critical Isthmus by Tracking Delayed Potential in Edited Windows for Scar-Related Ventricular Tachycardia. Korean Circ J 2016; 46:56-62. [PMID: 26798386 PMCID: PMC4720850 DOI: 10.4070/kcj.2016.46.1.56] [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] [Received: 03/22/2015] [Revised: 06/09/2015] [Accepted: 07/21/2015] [Indexed: 11/25/2022] Open
Abstract
Background and Objectives Identifying the critical isthmus of slow conduction is crucial for successful treatment of scar-related ventricular tachycardia. Current 3D mapping is not designed for tracking the critical isthmus and may lead to a risk of extensive ablation. We edited the algorithm to track the delayed potential in order to visualize the isthmus and compared the edited map with a conventional map. Subjects and Methods We marked every point that showed delayed potential with blue color. After substrate mapping, we edited to reset the annotation from true ventricular potential to delayed potential and then changed the window of interest from the conventional zone (early, 50-60%; late, 40-50% from peak of QRS) to the edited zone (early, 80-90%; late, 10-20%) for every blue point. Finally, we compared the propagation maps before and after editing. Results We analyzed five scar-related ventricular tachycardia cases. In the propagation maps, the resetting map showed the critical isthmus and entrance and exit sites of tachycardia that showed figure 8 reentry. However, conventional maps only showed the earliest ventricular activation sites and searched for focal tachycardia. All of the tachycardia cases were terminated by ablating the area around the isthmus. Conclusion Identifying the channel and direction of the critical isthmus by a new editing method to track delayed potential is essential in scar-related tachycardia.
Collapse
Affiliation(s)
- Ju Youn Kim
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Woo-Seung Shin
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Tae-Seok Kim
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sung-Hwan Kim
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ji-Hoon Kim
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sung-Won Jang
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hui-Nam Pak
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Gi-Byoung Nam
- Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Man Young Lee
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Tai-Ho Rho
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Yong Seog Oh
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| |
Collapse
|
41
|
Liang JJ, Santangeli P, Callans DJ. Long-term Outcomes of Ventricular Tachycardia Ablation in Different Types of Structural Heart Disease. Arrhythm Electrophysiol Rev 2015; 4:177-83. [PMID: 26835122 DOI: 10.15420/aer.2015.4.3.177] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 10/19/2015] [Indexed: 12/29/2022] Open
Abstract
Ventricular tachycardia (VT) often occurs in the setting of structural heart disease and can affect patients with ischaemic or nonischaemic cardiomyopathies. Implantable cardioverter-defibrillators (ICDs) provide mortality benefit and are therefore indicated for secondary prevention in patients with sustained VT, but they do not reduce arrhythmia burden. ICD shocks are associated with increased morbidity and mortality, and antiarrhythmic medications are often used to prevent recurrent episodes. Catheter ablation is an effective treatment option for patients with VT in the setting of structural heart disease and, when successful, can reduce the number of ICD shocks. However, whether VT ablation results in a mortality benefit remains unclear. We aim to review the long-term outcomes in patients with different types of structural heart disease treated with VT ablation.
Collapse
Affiliation(s)
- Jackson J Liang
- Electrophysiology Section, Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, US
| | - Pasquale Santangeli
- Electrophysiology Section, Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, US
| | - David J Callans
- Electrophysiology Section, Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, US
| |
Collapse
|
42
|
Hendriks AA, Khan M, Geller L, Kardos A, de Vries LJ, Yap SC, Wijchers SA, Theuns DA, Szili-Torok T. Ventricular tachycardia in ischemic cardiomyopathy; a combined endo-epicardial ablation as the first procedure versus a stepwise approach (EPILOGUE) - study protocol for a randomized controlled trial. Trials 2015; 16:487. [PMID: 26514959 PMCID: PMC4627407 DOI: 10.1186/s13063-015-1005-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 10/08/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The role of epicardial substrate ablation of ventricular tachycardia (VT) as a first-line approach in patients with ischemic heart disease is not clearly defined. Epicardial ablation as a first-line option is standard for patients with nonischemic dilated cardiomyopathy and arrhythmogenic right ventricular cardiomyopathy. Several nonrandomized studies, including studies on patients with ischemic heart disease, have shown that epicardial VT ablation improves outcome but this approach was often used after a failed endocardial approach. The aim of this study is to determine whether a combined endo-epicardial scar homogenization as a first-line approach will improve the outcome of VT ablation. METHODS/DESIGN The EPILOGUE study is a multicenter, two-armed, nonblinded, randomized controlled trial. Patients with ischemic heart disease who are referred for VT ablation will be randomly assigned to combined endo-epicardial scar homogenization or endocardial scar homogenization only (control group). The primary outcome is recurrence of sustained VT during a 2-year follow-up. Secondary outcomes include procedural success and safety. DISCUSSION This study is the first randomized trial that evaluates the role of a combined endo-epicardial scar homogenization versus endocardial scar homogenization for the treatment of ischemic scar-related VT. TRIAL REGISTRATION NL4816807814v02.
Collapse
Affiliation(s)
- Astrid A Hendriks
- Department of Clinical Electrophysiology, Erasmus Medical Center, Postbus 2040, 3015, CE, Rotterdam, The Netherlands. .,Department of Clinical Electrophysiology, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands.
| | - Muchtiar Khan
- Department of Clinical Electrophysiology, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands.
| | - Laszlo Geller
- Department of Clinical Electrophysiology, Cardiovascular Center Semmelweis University, Budapest, Hungary.
| | - Attila Kardos
- Department of Clinical Electrophysiology, Hungarian National Institute of Cardiology, Budapest, Hungary.
| | - Lennart J de Vries
- Department of Clinical Electrophysiology, Erasmus Medical Center, Postbus 2040, 3015, CE, Rotterdam, The Netherlands.
| | - Sing-Chien Yap
- Department of Clinical Electrophysiology, Erasmus Medical Center, Postbus 2040, 3015, CE, Rotterdam, The Netherlands.
| | - Sip A Wijchers
- Department of Clinical Electrophysiology, Erasmus Medical Center, Postbus 2040, 3015, CE, Rotterdam, The Netherlands.
| | - Dominic Amj Theuns
- Department of Clinical Electrophysiology, Erasmus Medical Center, Postbus 2040, 3015, CE, Rotterdam, The Netherlands.
| | - Tamas Szili-Torok
- Department of Clinical Electrophysiology, Erasmus Medical Center, Postbus 2040, 3015, CE, Rotterdam, The Netherlands.
| |
Collapse
|
43
|
Ipek EG, Nazarian S. Cardiac magnetic resonance for prediction of arrhythmogenic areas. Trends Cardiovasc Med 2015; 25:635-42. [PMID: 25937045 PMCID: PMC4559491 DOI: 10.1016/j.tcm.2015.02.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Revised: 02/23/2015] [Accepted: 02/23/2015] [Indexed: 12/20/2022]
Abstract
Catheter ablation has been widely used to manage recurrent atrial and ventricular arrhythmias. It has been established that contrast-enhanced magnetic resonance can accurately characterize the myocardium. In this review, we summarize the role of cardiac magnetic resonance in identification of arrhythmogenic substrates, and the potential utility of cardiac magnetic resonance for catheter ablation of complex atrial and ventricular arrhythmias.
Collapse
Affiliation(s)
- Esra Gucuk Ipek
- Department of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD.
| | - Saman Nazarian
- Department of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| |
Collapse
|
44
|
Yalin K, Golcuk E, Aksu T. Cardiac Magnetic Resonance for Ventricular Arrhythmia Therapies in Patients with Coronary Artery Disease. J Atr Fibrillation 2015; 8:1242. [PMID: 27957178 DOI: 10.4022/jafib.1242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/20/2015] [Accepted: 05/20/2015] [Indexed: 11/10/2022]
Abstract
Cardiac magnetic resonance (CMR) imaging is currently gold standard for myocardial tissue characterization and scar assessment. CMR serves potential prognostic information in patients with coronary artery disease (CAD) for both ventricular arrhythmia risk, as well as it may also be used for guiding VT ablation procedures. This review is focused on the usefulness of CMR for ventricular arrhythmia therapies in patients with CAD.
Collapse
Affiliation(s)
| | - Ebru Golcuk
- Derince Education and Research Hospital, Turkey
| | - Tolga Aksu
- Bursa State Hospital, Cardiology Clinic, Turkey
| |
Collapse
|
45
|
Koutalas E, Rolf S, Dinov B, Richter S, Arya A, Bollmann A, Hindricks G, Sommer P. Contemporary Mapping Techniques of Complex Cardiac Arrhythmias - Identifying and Modifying the Arrhythmogenic Substrate. Arrhythm Electrophysiol Rev 2015; 4:19-27. [PMID: 26835095 PMCID: PMC4711490 DOI: 10.15420/aer.2015.4.1.19] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Accepted: 01/12/2015] [Indexed: 12/16/2022] Open
Abstract
Cardiac electrophysiology has moved a long way forward during recent decades in the comprehension and treatment of complex cardiac arrhythmias. Contemporary electroanatomical mapping systems, along with state-of-the-art technology in the manufacture of electrophysiology catheters and cardiac imaging modalities, have significantly enriched our armamentarium, enabling the implementation of various mapping strategies and techniques in electrophysiology procedures. Beyond conventional mapping strategies, ablation of complex fractionated electrograms and rotor ablation in atrial fibrillation ablation procedures, the identification and modification of the underlying arrhythmogenic substrate has emerged as a strategy that leads to improved outcomes. Arrhythmogenic substrate modification also has a major role in ventricular tachycardia ablation procedures. Optimisation of contact between tissue and catheter and image integration are a further step forward to augment our precision and effectiveness. Hybridisation of existing technologies with a reasonable cost should be our goal over the next few years.
Collapse
Affiliation(s)
- Emmanuel Koutalas
- Department of Electrophysiology, Leipzig Heart Center, University of Leipzig, Leipzig, Germany
| | - Sascha Rolf
- Department of Electrophysiology, Leipzig Heart Center, University of Leipzig, Leipzig, Germany
| | - Borislav Dinov
- Department of Electrophysiology, Leipzig Heart Center, University of Leipzig, Leipzig, Germany
| | - Sergio Richter
- Department of Electrophysiology, Leipzig Heart Center, University of Leipzig, Leipzig, Germany
| | - Arash Arya
- Department of Electrophysiology, Leipzig Heart Center, University of Leipzig, Leipzig, Germany
| | - Andreas Bollmann
- Department of Electrophysiology, Leipzig Heart Center, University of Leipzig, Leipzig, Germany
| | - Gerhard Hindricks
- Department of Electrophysiology, Leipzig Heart Center, University of Leipzig, Leipzig, Germany
| | - Philipp Sommer
- Department of Electrophysiology, Leipzig Heart Center, University of Leipzig, Leipzig, Germany
| |
Collapse
|
46
|
Brown AO, Orihuela CJ. Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling. J Vis Exp 2015:52590. [PMID: 25939051 PMCID: PMC4541479 DOI: 10.3791/52590] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
During bacteremia Streptococcus pneumoniae can translocate across the vascular endothelium into the myocardium and form discrete bacteria-filled microscopic lesions (microlesions) that are remarkable due to the absence of infiltrating immune cells. Due to their release of cardiotoxic products, S. pneumoniae within microlesions are thought to contribute to the heart failure that is frequently observed during fulminate invasive pneumococcal disease in adults. Herein is demonstrated a protocol for experimental mouse infection that leads to reproducible cardiac microlesion formation within 30 hr. Instruction is provided on microlesion identification in hematoxylin & eosin stained heart sections and the morphological distinctions between early and late microlesions are highlighted. Instruction is provided on a protocol for verification of S. pneumoniae within microlesions using antibodies against pneumococcal capsular polysaccharide and immunofluorescent microscopy. Last, a protocol for antibiotic intervention that rescues infected mice and for the detection and assessment of scar formation in the hearts of convalescent mice is provided. Together, these protocols will facilitate the investigation of the molecular mechanisms underlying pneumococcal cardiac invasion, cardiomyocyte death, cardiac remodeling as a result of exposure to S. pneumoniae, and the immune response to the pneumococci in the heart.
Collapse
Affiliation(s)
- Armand O Brown
- Department of Microbiology and Immunology, The University of Texas Health Science Center at San Antonio
| | - Carlos J Orihuela
- Department of Microbiology and Immunology, The University of Texas Health Science Center at San Antonio;
| |
Collapse
|
47
|
Yamashita S, Sacher F, Mahida S, Berte B, Lim HS, Komatsu Y, Amraoui S, Denis A, Derval N, Laurent F, Montaudon M, Hocini M, Haïssaguerre M, Jaïs P, Cochet H. Role of High-Resolution Image Integration to Visualize Left Phrenic Nerve and Coronary Arteries During Epicardial Ventricular Tachycardia Ablation. Circ Arrhythm Electrophysiol 2015; 8:371-80. [DOI: 10.1161/circep.114.002420] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 02/05/2015] [Indexed: 11/16/2022]
Abstract
Background—
Epicardial ventricular tachycardia (VT) ablation is associated with risks of coronary artery (CA) and phrenic nerve (PN) injury. We investigated the role of multidetector computed tomography in visualizing CA and PN during VT ablation.
Methods and Results—
Ninety-five consecutive patients (86 men; age, 57±15) with VT underwent cardiac multidetector computed tomography. The PN detection rate and anatomic variability were analyzed. In 49 patients undergoing epicardial mapping, real-time multidetector computed tomographic integration was used to display CAs/PN locations in 3-dimensional mapping systems. Elimination of local abnormal ventricular activities (LAVAs) was used as ablation end point. The distribution of CAs/PN with respect to LAVA was analyzed and compared between VT etiologies. Multidetector computed tomography detected PN in 81 patients (85%). Epicardial LAVAs were observed in 44 of 49 patients (15 ischemic cardiomyopathy, 15 nonischemic cardiomyopathy, and 14 arrhythmogenic right ventricular cardiomyopathy) with a mean of 35±37 LAVA points/patient. LAVAs were located within 1 cm from CAs and PN in 35 (80%) and 18 (37%) patients, respectively. The prevalence of LAVA adjacent to CAs was higher in nonischemic cardiomyopathy and arrhythmogenic right ventricular cardiomyopathy than in ischemic cardiomyopathy (100% versus 86% versus 53%;
P
<0.01). The prevalence of LAVAs adjacent to PN was higher in nonischemic cardiomyopathy than in ischemic cardiomyopathy (93% versus 27%;
P
<0.001). Epicardial ablation was performed in 37 patients (76%). Epicardial LAVAs could not be eliminated because of the proximity to CAs or PN in 8 patients (18%).
Conclusions—
The epicardial electrophysiological VT substrate is often close to CAs and PN in patients with nonischemic cardiomyopathy. High-resolution image integration is potentially useful to minimize risks of PN and CA injury during epicardial VT ablation.
Collapse
Affiliation(s)
- Seigo Yamashita
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Frédéric Sacher
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Saagar Mahida
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Benjamin Berte
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Han S. Lim
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Yuki Komatsu
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Sana Amraoui
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Arnaud Denis
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Nicolas Derval
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - François Laurent
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Michel Montaudon
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Mélèze Hocini
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Michel Haïssaguerre
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Pierre Jaïs
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| | - Hubert Cochet
- From the Department of Cardiac Electrophysiology (S.Y., F.S., S.M., B.B., H.S.L., Y.K., S.A., A.D., N.D., M.H., M.H., P.J.) and Department of Cardiovascular Imaging (F.L., M.M., H.C.), Hôpital Cardiologique du Haut-Lévêque, CHU de Bordeaux, Pessac, France; and Institut Liryc/Equipex Music, Université de Bordeaux-Inserm U1045, Pessac, France (F.S., A.D., N.D., F.L., M.M., M.H., M.H., P.J., H.C.)
| |
Collapse
|
48
|
Enriquez A, Ali FS, Boles U, Michael K, Simpson C, Abdollah H, Baranchuk A, Redfearn D. Unipolar voltage threshold of 5.0 mV is optimal to localize critical isthmuses in post-infarction patients presenting with ventricular tachycardia. Int J Cardiol 2015; 187:438-42. [PMID: 25841144 DOI: 10.1016/j.ijcard.2015.03.397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 03/14/2015] [Accepted: 03/21/2015] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Bipolar voltage mapping is useful to delineate post-infarct endocardial scar and guide ablation of ischemic VT. The role of unipolar mapping is not yet well defined. The aim of this study was to assess the correlation between electrophysiological findings in patients with ischemic VT and unipolar voltage maps using different cut-offs. METHODS We included 10 patients (age 67 ± 7 years, ejection fraction 33 ± 10%) with ischemic cardiomyopathy undergoing catheter ablation for recurrent VT. Patients with right-sided VTs were excluded. In all patients a unipolar voltage map was constructed during right ventricular pacing. Ablation was performed guided by activation and entrainment mapping in hemodynamically stable VTs and by pace-mapping and abnormal (late/split/fractionated) potentials in unstable VTs. Subsequently, the unipolar voltage maps were analyzed off-line using cutoffs from 1.0 to 8.0 mV and correlated with the isthmus sites. RESULTS A total of 17 sustained VTs were induced in the 10 patients and non-inducibility of the clinical VT was achieved in 90% of patients by endocardial ablation. The optimal cutoff was 5.0 mV. By using this value, the mean surface area of abnormal unipolar voltage was 43.8% and 95% of all VT isthmuses were located within the area of scar, as well as 81% of abnormal potentials. In addition, 71% of isthmuses were at less than 1cm from the scar border. CONCLUSION Unipolar voltage mapping showed good correlation with areas of isthmuses and abnormal electrograms in patients with scar-related VT, with a cut-off of 5.0 mV allowing the best delineation of ablation targets.
Collapse
|
49
|
Yalin K, Golcuk E, Bilge AK, Aksu T, Buyukbayrak H, Tiryakioglu SK, Emet S, Adalet K. Combined analysis of unipolar and bipolar voltage mapping identifies recurrences after unmappable scar-related ventricular tachycardia ablation. Europace 2015; 17:1580-6. [PMID: 25750215 DOI: 10.1093/europace/euv013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/19/2015] [Indexed: 11/14/2022] Open
Abstract
AIMS Scars causing ventricular tachycardia can extend deep to and beyond bipolar low-voltage areas (LVAs) and they may be a reason for endocardial ablation failure. Analysis of endocardial unipolar voltage maps has been used to detect scar transmurality and epicardial scar. We hypothesized that endocardial unipolar LVA around the overlying bipolar LVA may predict endocardial ablation recurrence in patients with structural heart disease undergoing substrate modification. METHODS AND RESULTS Twenty consecutive patients with structural heart disease (11 ischaemic and 9 non-ischaemic cardiomyopathy) and undergoing substrate modification due to unmappable ventricular tachycardia (VT) (18 males, 51 ± 11 age, LVEF: 36 ± 7%) were retrospectively reviewed. Bipolar LVA defined as <1.5 mV and unipolar LVA defined as <8.3 mV, respectively, on electro-anatomic mapping system. Peripheral unipolar LVA (pUni-LVA) surrounding bipolar LVA was measured and compared patients with and without VT recurrence at 6-month follow-up period. : Mean unipolar voltage and mean bipolar voltage was 6.26 ± 4.99 and 1.90 ± 2.30 mV, respectively. Bipolar voltage and unipolar voltage in corresponding points were correlated (r = 0.652, P = 0.0001). In all patients, unipolar LVAs were larger than the bipolar LVAs. Bipolar LVA (91.1 ± 93.5 vs. 87.5 ± 47.5 cm(2), P = 0.91) and unipolar LVA (148.1 ± 96.3 vs. 104.7 ± 44.2 cm(2), P = 0.21) were similar in patients with and without VT recurrence, respectively. Peripheral unipolar LVA was significantly larger in patients with VT recurrence than without (57.0 ± 40.4 vs. 17.2 ± 12.9 cm(2), P = 0.01). CONCLUSION In patients with structural heart disease and unmappable VT, pUni-LVA surrounding bipolar scar predicts recurrence of VT ablation. The results of this pilot study highlight the importance of intramural/epicardial substrate on endocardial VT ablation outcome.
Collapse
Affiliation(s)
- Kivanc Yalin
- Department of Cardiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul Tıp Fakültesi-Fatih, Fatih, Istanbul 34104, Turkey Cardiology Clinic, Bursa State Hospital, Kliniği Osmangazi, Alaaddin Mh., Bursa 16040, Turkey
| | - Ebru Golcuk
- Department of Cardiology, School of Medicine, Koc University, Davutpaşa Cd. No:4 Topkapı, İstanbul, Turkey
| | - Ahmet Kaya Bilge
- Department of Cardiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul Tıp Fakültesi-Fatih, Fatih, Istanbul 34104, Turkey
| | - Tolga Aksu
- Department of Cardiology, Kocaeli Derice Research and Training Hospital, İbnisina Mh. Lojman Sk. Derince, Kocaeli, Turkey
| | | | - Selma Kenar Tiryakioglu
- Cardiology Clinic, Bursa State Hospital, Kliniği Osmangazi, Alaaddin Mh., Bursa 16040, Turkey
| | - Samim Emet
- Department of Cardiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul Tıp Fakültesi-Fatih, Fatih, Istanbul 34104, Turkey
| | - Kamil Adalet
- Department of Cardiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul Tıp Fakültesi-Fatih, Fatih, Istanbul 34104, Turkey
| |
Collapse
|
50
|
Irie T, Yu R, Bradfield JS, Vaseghi M, Buch EF, Ajijola O, Macias C, Fujimura O, Mandapati R, Boyle NG, Shivkumar K, Tung R. Relationship between sinus rhythm late activation zones and critical sites for scar-related ventricular tachycardia: systematic analysis of isochronal late activation mapping. Circ Arrhythm Electrophysiol 2015; 8:390-9. [PMID: 25740836 DOI: 10.1161/circep.114.002637] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 02/16/2015] [Indexed: 11/16/2022]
Abstract
BACKGROUND It is not known whether the most delayed late potentials are functionally most specific for scar-related ventricular tachycardia (VT) circuits. METHODS AND RESULTS Isochronal late activation maps were constructed to display ventricular activation during sinus rhythm over 8 isochrones. Analysis was performed at successful VT termination sites and prospectively tested. Thirty-three patients with 47 scar-related VTs where a critical site was demonstrated by termination of VT during ablation were retrospectively analyzed. In those who underwent mapping of multiple surfaces, 90% of critical sites were on the surface that contained the latest late potential. However, only 11% of critical sites were localized to the latest isochrone (87.5%-100%) of ventricular activation. The median percentage of latest activation at critical sites was 78% at a distance from the latest isochrone of 18 mm. Sites critical to reentry were harbored in regions with slow conduction velocity, where 3 isochrones were present within a 1-cm radius. Ten consecutive patients underwent ablation prospectively guided by isochronal late activation maps, targeting concentric isochrones outside of the latest isochrone. Elimination of the targeted VT was achieved in 90%. Termination of VT was achieved in 6 patients at a mean ventricular activation percentage of 78%, with only 1 requiring ablation in the latest isochrone. CONCLUSIONS Late potentials identified in the latest isochrone of activation during sinus rhythm are infrequently correlated with successful ablation sites for VT. The targeting of slow conduction regions propagating into the latest zone of activation may be a novel and promising strategy for substrate modification.
Collapse
Affiliation(s)
- Tadanobu Irie
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Ricky Yu
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Jason S Bradfield
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Marmar Vaseghi
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Eric F Buch
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Olujimi Ajijola
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Carlos Macias
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Osamu Fujimura
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Ravi Mandapati
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Noel G Boyle
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Kalyanam Shivkumar
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| | - Roderick Tung
- From the University of California at Los Angeles Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA
| |
Collapse
|