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Rademaker R, Kimura Y, de Riva Silva M, Beukers HC, Piers SRD, Wijnmaalen AP, Dekkers OM, Zeppenfeld K. Area-weighted unipolar voltage to predict heart failure outcomes in patients with ischaemic cardiomyopathy and ventricular tachycardia. Europace 2024; 26:euad346. [PMID: 38308809 PMCID: PMC10838146 DOI: 10.1093/europace/euad346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 11/15/2023] [Indexed: 02/05/2024] Open
Abstract
AIMS Patients with ischaemic cardiomyopathy (ICM) referred for catheter ablation of ventricular tachycardia (VT) are at risk for end-stage heart failure (HF) due to adverse remodelling. Local unipolar voltages (UV) decrease with loss of viable myocardium. A UV parameter reflecting global viable myocardium may predict prognosis. We evaluate if a newly proposed parameter, area-weighted unipolar voltage (awUV), can predict HF-related outcomes [HFO; HF death/left ventricular (LV) assist device/heart transplant] in ICM. METHODS AND RESULTS From endocardial voltage maps of consecutive patients with ICM referred for VT ablation, awUV was calculated by weighted interpolation of local UV. Associations between clinical and mapping parameters and HFO were evaluated and validated in a second cohort. The derivation cohort consisted of 90 patients [age 68 ±8 years; LV ejection fraction (LVEF) 35% interquartile range (IQR) (24-40)] and validation cohort of 60 patients [age 67 ± 9, LVEF 39% IQR (29-45)]. In the derivation cohort, during a median follow-up of 45 months [IQR (34-83)], 36 (43%) patients died and 23 (26%) had HFO. Patients with HFO had lower awUV [4.51 IQR (3.69-5.31) vs. 7.03 IQR (6.08-9.2), P < 0.001]. A reduction in awUV [optimal awUV (5.58) cut-off determined by receiver operating characteristics analysis] was a strong predictor of HFO (3-year HFO survival 97% vs. 57%). The cut-off value was confirmed in the validation cohort (2-year HFO-free survival 96% vs. 60%). CONCLUSION The newly proposed parameter awUV, easily available from routine voltage mapping, may be useful at identifying ICM patients at high risk for HFO.
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Affiliation(s)
- Robert Rademaker
- Department of Cardiology (C-05-P), Leiden University Medical Center, P.O. Box 9600, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
- Willem Einthoven Center of Arrhythmia Research and Management, Leiden, The Netherlands
| | - Yoshi Kimura
- Department of Cardiology (C-05-P), Leiden University Medical Center, P.O. Box 9600, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
- Willem Einthoven Center of Arrhythmia Research and Management, Leiden, The Netherlands
| | - Marta de Riva Silva
- Department of Cardiology (C-05-P), Leiden University Medical Center, P.O. Box 9600, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
- Willem Einthoven Center of Arrhythmia Research and Management, Leiden, The Netherlands
| | - Hans C Beukers
- Department of Cardiology (C-05-P), Leiden University Medical Center, P.O. Box 9600, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Sebastiaan R D Piers
- Department of Cardiology (C-05-P), Leiden University Medical Center, P.O. Box 9600, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
- Willem Einthoven Center of Arrhythmia Research and Management, Leiden, The Netherlands
| | - Adrianus P Wijnmaalen
- Department of Cardiology (C-05-P), Leiden University Medical Center, P.O. Box 9600, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
- Willem Einthoven Center of Arrhythmia Research and Management, Leiden, The Netherlands
| | - Olaf M Dekkers
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Katja Zeppenfeld
- Department of Cardiology (C-05-P), Leiden University Medical Center, P.O. Box 9600, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
- Willem Einthoven Center of Arrhythmia Research and Management, Leiden, The Netherlands
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Nakahara S. Catheter ablation of ventricular tachycardia associated with structural heart disease: Current status and perspectives. J Cardiol 2023; 81:57-62. [PMID: 36174816 DOI: 10.1016/j.jjcc.2022.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 09/06/2022] [Indexed: 11/25/2022]
Abstract
Catheter ablation is an effective and safe treatment for ventricular tachycardia attributable to structural heart disease, reducing the risk of recurrent arrhythmias and defibrillator shock therapy. Advances in medical technology and an accumulation of data have led to the development of detailed guidelines. Successful ablation requires accurate identification of the arrhythmia substrate and effective delivery of radiofrequency energy to the target tissue. Modern practice requires use of traditional electrophysiological mapping processes such as entrainment mapping and three-dimensional activation sequence mapping in combination with newer functional mapping techniques for which there is growing support. Thorough non-invasive preoperative assessment is also necessary before an invasive procedure is undertaken. In this review, we summarize contemporary practice and recent randomized controlled trials underpinning the latest developments in mapping and ablation and discuss potential future developments in this field.
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Affiliation(s)
- Shiro Nakahara
- Department of Cardiology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Japan.
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3
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Adeliño R, Martínez-Falguera D, Curiel C, Teis A, Marsal R, Rodríguez-Leor O, Prat-Vidal C, Fadeuilhe E, Aranyó J, Revuelta-López E, Sarrias A, Bazan V, Andrés-Cordón JF, Roura S, Villuendas R, Lupón J, Bayes-Genis A, Gálvez-Montón C, Bisbal F. Electrophysiological effects of adipose graft transposition procedure (AGTP) on the post-myocardial infarction scar: A multimodal characterization of arrhythmogenic substrate. Front Cardiovasc Med 2022; 9:983001. [PMID: 36204562 PMCID: PMC9530287 DOI: 10.3389/fcvm.2022.983001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/23/2022] [Indexed: 11/13/2022] Open
Abstract
Objective To assess the arrhythmic safety profile of the adipose graft transposition procedure (AGTP) and its electrophysiological effects on post-myocardial infarction (MI) scar. Background Myocardial repair is a promising treatment for patients with MI. The AGTP is a cardiac reparative therapy that reduces infarct size and improves cardiac function. The impact of AGTP on arrhythmogenesis has not been addressed. Methods MI was induced in 20 swine. Contrast-enhanced magnetic resonance (ce-MRI), electrophysiological study (EPS), and left-ventricular endocardial high-density mapping were performed 15 days post-MI. Animals were randomized 1:1 to AGTP or sham-surgery group and monitored with ECG-Holter. Repeat EPS, endocardial mapping, and ce-MRI were performed 30 days post-intervention. Myocardial SERCA2, Connexin-43 (Cx43), Ryanodine receptor-2 (RyR2), and cardiac troponin-I (cTnI) gene and protein expression were evaluated. Results The AGTP group showed a significant reduction of the total infarct scar, border zone and dense scar mass by ce-MRI (p = 0.04), and a decreased total scar and border zone area in bipolar voltage mapping (p < 0.001). AGTP treatment significantly reduced the area of very-slow conduction velocity (<0.2 m/s) (p = 0.002), the number of deceleration zones (p = 0.029), and the area of fractionated electrograms (p = 0.005). No differences were detected in number of induced or spontaneous ventricular arrhythmias at EPS and Holter-monitoring. SERCA2, Cx43, and RyR2 gene expression were decreased in the infarct core of AGTP-treated animals (p = 0.021, p = 0.018, p = 0.051, respectively). Conclusion AGTP is a safe reparative therapy in terms of arrhythmic risk and provides additional protective effect against adverse electrophysiological remodeling in ischemic heart disease.
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Affiliation(s)
- Raquel Adeliño
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
| | - Daina Martínez-Falguera
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Faculty of Medicine, University of Barcelona, Barcelona, Spain
| | - Carolina Curiel
- Boston Scientific Department, Barcelona Delegation, Barcelona, Spain
| | - Albert Teis
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
| | - Roger Marsal
- Boston Scientific Department, Barcelona Delegation, Barcelona, Spain
| | - Oriol Rodríguez-Leor
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
| | - Cristina Prat-Vidal
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
| | - Edgar Fadeuilhe
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
| | - Júlia Aranyó
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
| | - Elena Revuelta-López
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
| | - Axel Sarrias
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
| | - Víctor Bazan
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
| | | | - Santiago Roura
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- Faculty of Medicine, University of Vic-Central University of Catalonia (UVic-UCC), Vic, Spain
| | - Roger Villuendas
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
| | - Josep Lupón
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- Department of Medicine, Can Ruti Campus, Autonomous University of Barcelona, Barcelona, Spain
| | - Antoni Bayes-Genis
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- Department of Medicine, Can Ruti Campus, Autonomous University of Barcelona, Barcelona, Spain
| | - Carolina Gálvez-Montón
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- *Correspondence: Carolina Gálvez-Montón,
| | - Felipe Bisbal
- ICREC Research Program, Germans Trias i Pujol Research Institute (IGTP), Barcelona, Spain
- Heart Institute (iCOR), Germans Trias i Pujol University Hospital, Barcelona, Spain
- CIBER Cardiovascular, Instituto de Salud Carlos III, Madrid, Spain
- *Correspondence: Carolina Gálvez-Montón,
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Wiles BM, Li AC, Waight MC, Saba MM. Contemporary Management of Complex Ventricular Arrhythmias. Arrhythm Electrophysiol Rev 2022; 11:e04. [PMID: 35734144 PMCID: PMC9194914 DOI: 10.15420/aer.2021.66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/06/2022] [Indexed: 12/02/2022] Open
Abstract
Percutaneous catheter ablation is an effective and safe therapy that can eliminate ventricular tachycardia, reducing the risks of both recurrent arrhythmia and shock therapies from a defibrillator. Successful ablation requires accurate identification of arrhythmic substrate and the effective delivery of energy to the targeted tissue. A thorough pre-procedural assessment is needed before considered 3D electroanatomical mapping can be performed. In contemporary practice, this must combine traditional electrophysiological techniques, such as activation and entrainment mapping, with more novel physiological mapping techniques for which there is an ever-increasing evidence base. Novel techniques to maximise energy delivery to the tissue must also be considered and balanced against their associated risks of complication. This review provides a comprehensive appraisal of contemporary practice and the evidence base that supports recent developments in mapping and ablation, while also considering potential future developments in the field.
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Affiliation(s)
- Benedict M Wiles
- Advanced Ventricular Arrhythmia Training and Research (AVATAR) Program, St George's University Hospitals NHS Foundation Trust, London, UK
- Cardiology Clinical Academic Group, St George's University of London, London, UK
| | - Anthony C Li
- Advanced Ventricular Arrhythmia Training and Research (AVATAR) Program, St George's University Hospitals NHS Foundation Trust, London, UK
- Cardiology Clinical Academic Group, St George's University of London, London, UK
| | - Michael C Waight
- Advanced Ventricular Arrhythmia Training and Research (AVATAR) Program, St George's University Hospitals NHS Foundation Trust, London, UK
- Cardiology Clinical Academic Group, St George's University of London, London, UK
| | - Magdi M Saba
- Advanced Ventricular Arrhythmia Training and Research (AVATAR) Program, St George's University Hospitals NHS Foundation Trust, London, UK
- Cardiology Clinical Academic Group, St George's University of London, London, UK
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5
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Ciaccio EJ, Anter E, Coromilas J, Wan EY, Yarmohammadi H, Wit AL, Peters NS, Garan H. Structure and function of the ventricular tachycardia isthmus. Heart Rhythm 2022; 19:137-153. [PMID: 34371192 DOI: 10.1016/j.hrthm.2021.08.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/22/2021] [Accepted: 08/01/2021] [Indexed: 12/24/2022]
Abstract
Catheter ablation of postinfarction reentrant ventricular tachycardia (VT) has received renewed interest owing to the increased availability of high-resolution electroanatomic mapping systems that can describe the VT circuits in greater detail, and the emergence and need to target noninvasive external beam radioablation. These recent advancements provide optimism for improving the clinical outcome of VT ablation in patients with postinfarction and potentially other scar-related VTs. The combination of analyses gleaned from studies in swine and canine models of postinfarction reentrant VT, and in human studies, suggests the existence of common electroanatomic properties for reentrant VT circuits. Characterizing these properties may be useful for increasing the specificity of substrate mapping techniques and for noninvasive identification to guide ablation. Herein, we describe properties of reentrant VT circuits that may assist in elucidating the mechanisms of onset and maintenance, as well as a means to localize and delineate optimal catheter ablation targets.
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Affiliation(s)
- Edward J Ciaccio
- Department of Medicine, Division of Cardiology, Columbia University College of Physicians and Surgeons, New York, New York; ElectroCardioMaths Programme, Imperial Centre for Cardiac Engineering, Imperial College London, London, United Kingdom.
| | - Elad Anter
- Department of Cardiovascular Medicine, Cardiac Electrophysiology, Cleveland Clinic, Cleveland, Ohio
| | - James Coromilas
- Department of Medicine, Division of Cardiovascular Disease and Hypertension, Rutgers University, New Brunswick, New Jersey
| | - Elaine Y Wan
- Department of Medicine, Division of Cardiology, Columbia University College of Physicians and Surgeons, New York, New York
| | - Hirad Yarmohammadi
- Department of Medicine, Division of Cardiology, Columbia University College of Physicians and Surgeons, New York, New York
| | - Andrew L Wit
- Department of Pharmacology, Columbia University College of Physicians and Surgeons, New York, New York
| | - Nicholas S Peters
- ElectroCardioMaths Programme, Imperial Centre for Cardiac Engineering, Imperial College London, London, United Kingdom
| | - Hasan Garan
- Department of Medicine, Division of Cardiology, Columbia University College of Physicians and Surgeons, New York, New York
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6
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Kurzelowski R, Barański K, Caluori G, Szot W, Grabowski K, Michalewska-Włudarczyk A, Syzdół M, Kuczmik W, Błach A, Ochała B, Hudziak D, Wilczek J, Gołba KS, Starek Z, Tendera M, Wojakowski W, Jadczyk T. Correlation between electromechanical parameters (NOGA XP) and changes of myocardial ischemia in patients with refractory angina. ADVANCES IN INTERVENTIONAL CARDIOLOGY 2021; 17:281-289. [PMID: 34819964 PMCID: PMC8596713 DOI: 10.5114/aic.2021.109168] [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: 12/05/2020] [Accepted: 07/23/2021] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Cell therapy has the potential to improve symptoms and clinical outcomes in refractory angina (RFA). Further analyses are needed to evaluate factors influencing its therapeutic effectiveness. AIM Assessment of electromechanical (EM) parameters of the left ventricle (LV) and investigation of correlation between EM parameters of the myocardium and response to CD133+ cell therapy. MATERIAL AND METHODS Thirty patients with RFA (16 active and 14 placebo individuals) enrolled in the REGENT-VSEL trial underwent EM evaluation of the LV with intracardiac mapping system. The following parameters were analyzed: unipolar voltage (UV), bipolar voltage (BV), local linear shortening (LLS). Myocardial ischemia was evaluated with single-photon emission computed tomography (SPECT). The median value of each EM parameter was used for intra-group comparisons. RESULTS Global EM parameters (UV, BV, LLS) of LV in active and placebo groups were 11.28 mV, 3.58 mV, 11.12%, respectively; 13.00 mV, 3.81 mV, 11.32%, respectively. EM characteristics analyzed at global and segmental levels did not predict response to CD133+ cell therapy in patients with RFA (Global UV, BV and LLS at rest R = -0.06; R = 0.2; R = -0.1 and at stress: R = 0.07, R = 0.09, R = -0.1, respectively; Segmental UV, BV, LLS at rest R = -0.2, R = 0.03, R = -0.4 and at stress R = 0.02, R = 0.2, R = -0.2, respectively). Multiple linear regression of the treated segments showed that only pre-injection SPECT levels were significantly correlated with post-injection SPECT, either at rest or stress (p < 0.05). CONCLUSIONS Electromechanical characteristics of the left ventricle do not predict changes of myocardial perfusion by SPECT after cell therapy. Baseline SPECT results are only predictors of changes of myocardial ischemia observed at 4-month follow-up.
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Affiliation(s)
- Radosław Kurzelowski
- Department of Cardiology and Structural Heart Disease, Medical University of Silesia, Katowice, Poland
| | - Kamil Barański
- Department of Epidemiology, Medical University of Silesia, Katowice, Poland
| | - Guido Caluori
- IHU LIRYC, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Pessac, France
- Univ. Bordeaux, INSERM, UMR 1045, Cardiothoracic Research Center of Bordeaux, Pessac, France
| | - Wojciech Szot
- Department of Nuclear Medicine, John Paul II Hospital, Jagiellonian University Medical College, Krakow, Poland
| | - Krzysztof Grabowski
- Department of Robotics and Mechatronics, AGH University of Science and Technology, Krakow, Poland
| | | | - Marcin Syzdół
- Department of Cardiology and Structural Heart Disease, Medical University of Silesia, Katowice, Poland
| | - Wacław Kuczmik
- Department of General and Vascular Surgery, Medical University of Silesia, Katowice, Poland
| | - Anna Błach
- Department of Cardiology and Structural Heart Disease, Medical University of Silesia, Katowice, Poland
| | - Beata Ochała
- Department of Cardiology and Structural Heart Disease, Medical University of Silesia, Katowice, Poland
| | - Damian Hudziak
- Department of Cardiac Surgery, Medical University of Silesia, Katowice, Poland
| | - Jacek Wilczek
- Department of Electrocardiology and Heart Failure, Medical University of Silesia, Katowice, Poland
| | - Krzysztof S. Gołba
- Department of Electrocardiology and Heart Failure, Medical University of Silesia, Katowice, Poland
| | - Zdenek Starek
- Interventional Cardiac Electrophysiology Group, International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
- 1 Department of Internal Medicine – Cardioangiology, St. Anne’s University Hospital, Brno, Czech Republic
| | - Michał Tendera
- Department of Cardiology and Structural Heart Disease, Medical University of Silesia, Katowice, Poland
| | - Wojciech Wojakowski
- Department of Cardiology and Structural Heart Disease, Medical University of Silesia, Katowice, Poland
| | - Tomasz Jadczyk
- Department of Cardiology and Structural Heart Disease, Medical University of Silesia, Katowice, Poland
- Interventional Cardiac Electrophysiology Group, International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
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7
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Nakajima I, Narui R, Aboud AA, Adeola O, McHugh J, Holmes B, Lugo R, Richardson TD, Montgomery J, Shen S, Kanagasundram A, Michaud GF, Stevenson WG. Periaortic Ventricular Tachycardias in Nonischemic Cardiomyopathy: Substrate and Electrocardiographic Correlations. Circ Arrhythm Electrophysiol 2021; 14:e008887. [PMID: 33417473 DOI: 10.1161/circep.120.008887] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Periaortic fibrotic ventricular tachycardia (VT) substrate is common in nonischemic cardiomyopathy (NICM), often intramural, and difficult to ablate. We sought to better characterize normal and abnormal periaortic voltage map parameters and NICM periaortic VTs. METHODS In 15 patients without heart disease, the 5th percentile of endocardial voltage for increasing distance from the aortic valve ring was determined. In 53 consecutive patients with NICM (64±11 years; left ventricular ejection fraction 31±10%) undergoing ablation of recurrent VT, periaortic electrogram voltage and VT characteristics were analyzed. RESULTS In healthy patients, the fifth percentile of the bipolar voltage increased proportional to the distance from the aortic valve ring, from 1.0 mV at 1 cm to 1.5 mV at 1.5 cm; the corresponding unipolar voltage cutoffs were 5.0 and 7.5 mV. A total of 160 VTs were induced in 53 patients with NICM, of which 28 VTs in 20 patients had periaortic origins. Periaortic VTs were associated with similar periaortic bipolar voltage, but lower UVs consistent with intramural fibrosis as an important substrate. Periaortic VTs could be divided into left and right bundle branch block forms with mapping showing right septal and lateral exits. Left bundle branch block VTs were more often acutely abolished with ablation (100% versus 69%; P=0.034), but with a 23% incidence of heart block. Greater extent of low voltage was associated with more induced VTs and worse acute outcome. CONCLUSIONS Adjusting voltage parameters based on distance from the aortic valve may improve definition of left ventricular outflow tract arrhythmia substrate. Periaortic VTs are common in NICM, often associated with intramural substrate and can be divided into left bundle branch block and right bundle branch block types associated with different ablation outcomes and risks.
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Affiliation(s)
- Ikutaro Nakajima
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Ryohsuke Narui
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Asad A Aboud
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Oluwaseun Adeola
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Julia McHugh
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Benjamin Holmes
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Ricardo Lugo
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Travis D Richardson
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Jay Montgomery
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Sharon Shen
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Arvindh Kanagasundram
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Gregory F Michaud
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - William G Stevenson
- Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
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Berte B, Zeppenfeld K, Tung R. Impact of Micro-, Mini- and Multi-Electrode Mapping on Ventricular Substrate Characterisation. Arrhythm Electrophysiol Rev 2020; 9:128-135. [PMID: 33240508 PMCID: PMC7675146 DOI: 10.15420/aer.2020.24] [Citation(s) in RCA: 17] [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: 05/27/2020] [Accepted: 08/23/2020] [Indexed: 12/29/2022] Open
Abstract
Accurate substrate characterisation may improve the evolving understanding and treatment of cardiac arrhythmias. During substrate-based ablation techniques, wide practice variations exist with mapping via dedicated multi-electrode catheter or conventional ablation catheters. Recently, newer ablation catheter technology with embedded mapping electrodes have been introduced. This article focuses on the general misconceptions of voltage mapping and more specific differences in unipolar and bipolar signal morphology, field of view, signal-to-noise ratio, mapping capabilities (density and resolution), catheter-specific voltage thresholds and impact of micro-, mini- and multi-electrodes for substrate mapping. Efficiency and cost-effectiveness of different catheter types are discussed. Increasing sampling density with smaller electrodes allows for higher resolution with a greater likelihood to record near-field electrical information. These advances may help to further improve our mechanistic understanding of the correlation between substrate and ventricular tachycardia, as well as macro-reentry arrhythmia in humans.
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Affiliation(s)
- Benjamin Berte
- Heart Center, Luzerner Kantonsspital, Lucerne, Switzerland
| | - Katja Zeppenfeld
- Department of Cardiology, Leiden University Medical Center, Leiden, the Netherlands
| | - Roderick Tung
- Center for Arrhythmia Care, Pritzker School of Medicine University of Chicago Medicine, Chicago, IL, US
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