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Zhu K, Sun Y, Lin M, Deng Y, Li L, Li G, Liu J, Wan X, Chang D, Li Q. The Physiologic Mechanisms of Paced QRS Narrowing During Left Bundle Branch Pacing in Right Bundle Branch Block Patients. Front Cardiovasc Med 2022; 9:835493. [PMID: 35369352 PMCID: PMC8965516 DOI: 10.3389/fcvm.2022.835493] [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: 12/14/2021] [Accepted: 02/16/2022] [Indexed: 11/26/2022] Open
Abstract
Left bundle branch pacing (LBBP) is a physiological pacing technique that captures the left bundle branch (LBB) directly, causing the left ventricle (LV) to be excited earlier than the right ventricle (RV), resulting in a “iatrogenic” right bundle branch block (RBBB) pacing pattern. Several studies have recently shown that permanent LBBP can completely or partially narrow the wide QRS duration of the intrinsic RBBB in most patients with bradycardia, although the mechanisms by which this occurs has not been thoroughly investigated. This article presents a review of the LBBP in patients with intrinsic RBBB mentioned in current case reports and clinical studies, discussing the technique, possible mechanisms, future clinical explorations, and the feasibility of eliminating the interventricular dyssynchronization accompanied with LBBP.
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Affiliation(s)
- Kailun Zhu
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- School of Medicine, Xiamen University, Xiamen, China
| | - Yali Sun
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- School of Medicine, Xiamen University, Xiamen, China
| | - Manxin Lin
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Yingjian Deng
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Linlin Li
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Guiyang Li
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Jianghai Liu
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Xingcai Wan
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Dong Chang
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- Dong Chang,
| | - Qiang Li
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
- *Correspondence: Qiang Li,
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2
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Pfeffer C, Fryer M, Quah JX, Dayananda N, Tung M. Electrogram analysis to detect cathodal and anodal capture in left ventricular cardiac resynchronization pacing leads. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2021; 45:165-175. [PMID: 34879152 DOI: 10.1111/pace.14403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 10/25/2021] [Accepted: 10/31/2021] [Indexed: 11/30/2022]
Abstract
AIMS Our study analyzed cardiac electrograms (EGMs) to identify characteristics for detecting cathodal, anodal, or cathodal-anodal (simultaneous) capture in left ventricular (LV) quadripolar pacing leads of cardiac resynchronization therapy (CRT) patients. The relationship between these EGM characteristics and the electrocardiogram (ECG) was also examined. METHODS We performed a retrospective analysis of 54 bipolar pacing configurations across 9 patients with implanted CRT devices and quadripolar leads who had undergone a 12 lead ECG optimization. Three pacing tests (cathode unipolar, anode unipolar, and bipolar) per bipolar pair were performed, examining ECG and EGM morphology changes accompanying each test and any transitions of morphology or amplitude during voltage stepdown. RESULTS During the cathode and anode unipolar pacing tests, the EGM was biphasic (negative/positive) or monophasic (positive) in 52/53 (98%), and biphasic (positive/negative) or monophasic (negative) in 50/51 (98%) respectively. During bipolar LV capture threshold testing, 30 bipolar pairs displayed a sudden increase in EGM amplitude (median 9.4mV, interquartile range [7 to 14mV]) when transitioning from cathodal-anodal capture to cathodal or anodal capture. 90% of these EGM transitions had a corresponding simultaneous change in ECG, while 10% had no ECG changes. Two patients demonstrated "quad-site" capture on their quadripolar lead with multipoint pacing enabled and cathodal-anodal capture from each stimulus. CONCLUSION EGM characteristics during LV pacing tests can reliably detect cathodal, anodal, or cathodal-anodal capture, with greater sensitivity than 12 lead ECG changes. Integration of EGM analysis into routine CRT device follow up can be performed easily and may have implications for CRT efficacy. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Cameron Pfeffer
- Electrophysiology, Abbott Laboratories, Building 1, Ground Floor, Freeway Office Park, 2728 Logan Road, Eight Mile Plains, Brisbane, Queensland, 4113, Australia
| | - Michael Fryer
- Cardiology, Sunshine Coast University Hospital, Sunshine Coast, Queensland, Australia
| | - Jing Xian Quah
- Cardiology, Flinders University College of Medicine and Public Health, Bedford Park, South Australia, Australia
| | - Naresh Dayananda
- Cardiology, Sunshine Coast University Hospital, Sunshine Coast, Queensland, Australia
| | - Matthew Tung
- Cardiology, Sunshine Coast University Hospital, Sunshine Coast, Queensland, Australia
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3
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Xie H, Chen X, Wang Y, Cheng Y, Zhao Y, Liu Y, Liu Y, Ge Z, Chen H, Shu X. Comparison of the Acute Effects of Different Pacing Sites on Cardiac Synchrony and Contraction Using Speckle-Tracking Echocardiography. Front Cardiovasc Med 2021; 8:758500. [PMID: 34859073 PMCID: PMC8631923 DOI: 10.3389/fcvm.2021.758500] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 10/20/2021] [Indexed: 11/18/2022] Open
Abstract
Background: Cardiac pacing in patients with bradyarrhythmia may employ variable pacing sites, which may have different effects on cardiac function. Left bundle branch pacing (LBBP) is a new physiological pacing modality, and the acute outcomes on cardiac mechanical synchrony during LBBP remain uncertain. We evaluated the acute effects of four pacing sites on cardiac synchrony and contraction using speckle-tracking echocardiography, and comparisons among four different pacing sites were rare. Methods: We enrolled 21 patients with atrioventricular block or sick sinus syndrome who each sequentially underwent acute pacing protocols, including right ventricular apical pacing (RVAP), right ventricular outflow tract pacing (RVOP), His bundle pacing (HBP), and left bundle branch pacing (LBBP). Electrocardiograms and echocardiograms were recorded at baseline and during pacing. The interventricular mechanical delay (IVMD), the standard deviation of the times to longitudinal peak strain during 17 segments (PSD), and the Yu index were used to evaluate ventricular mechanical synchrony. Layer-specific strain was computed using two-dimensional speckle tracking technique to provide in-depth details about ventricular synchrony and function. Results: Left ventricular ejection fraction (LVEF) and tricuspid annulus plane systolic excursion (TAPSE) were significantly decreased during RVAP and RVOP but were not significantly different during HBP and LBBP compared with baseline. RVAP and RVOP significantly prolonged QRS duration, whereas HBP and LBBP showed non-significant effects. IVMD and PSD were significantly increased during RVAP but were not significantly different during RVOP, HBP, or LBBP. LBBP resulted in a significant improvement in the IVMD and Yu index compared with RVAP. No significant differences in mechanical synchrony were found between HBP and LBBP. Conclusion: Among these pacing modalities, RVAP has a negative acute impact on cardiac synchrony and contraction. HBP and LBBP best preserve physiological cardiac synchrony and function.
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Affiliation(s)
- Huilin Xie
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Xueying Chen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China
| | - Yanan Wang
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Yufei Cheng
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Yingjie Zhao
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Yang Liu
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Yu Liu
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Zhenyi Ge
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Haiyan Chen
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Xianhong Shu
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
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4
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Nogami A, Kurita T, Abe H, Ando K, Ishikawa T, Imai K, Usui A, Okishige K, Kusano K, Kumagai K, Goya M, Kobayashi Y, Shimizu A, Shimizu W, Shoda M, Sumitomo N, Seo Y, Takahashi A, Tada H, Naito S, Nakazato Y, Nishimura T, Nitta T, Niwano S, Hagiwara N, Murakawa Y, Yamane T, Aiba T, Inoue K, Iwasaki Y, Inden Y, Uno K, Ogano M, Kimura M, Sakamoto S, Sasaki S, Satomi K, Shiga T, Suzuki T, Sekiguchi Y, Soejima K, Takagi M, Chinushi M, Nishi N, Noda T, Hachiya H, Mitsuno M, Mitsuhashi T, Miyauchi Y, Miyazaki A, Morimoto T, Yamasaki H, Aizawa Y, Ohe T, Kimura T, Tanemoto K, Tsutsui H, Mitamura H. JCS/JHRS 2019 guideline on non-pharmacotherapy of cardiac arrhythmias. J Arrhythm 2021; 37:709-870. [PMID: 34386109 PMCID: PMC8339126 DOI: 10.1002/joa3.12491] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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5
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Nogami A, Kurita T, Abe H, Ando K, Ishikawa T, Imai K, Usui A, Okishige K, Kusano K, Kumagai K, Goya M, Kobayashi Y, Shimizu A, Shimizu W, Shoda M, Sumitomo N, Seo Y, Takahashi A, Tada H, Naito S, Nakazato Y, Nishimura T, Nitta T, Niwano S, Hagiwara N, Murakawa Y, Yamane T, Aiba T, Inoue K, Iwasaki Y, Inden Y, Uno K, Ogano M, Kimura M, Sakamoto SI, Sasaki S, Satomi K, Shiga T, Suzuki T, Sekiguchi Y, Soejima K, Takagi M, Chinushi M, Nishi N, Noda T, Hachiya H, Mitsuno M, Mitsuhashi T, Miyauchi Y, Miyazaki A, Morimoto T, Yamasaki H, Aizawa Y, Ohe T, Kimura T, Tanemoto K, Tsutsui H, Mitamura H. JCS/JHRS 2019 Guideline on Non-Pharmacotherapy of Cardiac Arrhythmias. Circ J 2021; 85:1104-1244. [PMID: 34078838 DOI: 10.1253/circj.cj-20-0637] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Akihiko Nogami
- Department of Cardiology, Faculty of Medicine, University of Tsukuba
| | | | - Haruhiko Abe
- Department of Heart Rhythm Management, University of Occupational and Environmental Health, Japan
| | - Kenji Ando
- Department of Cardiology, Kokura Memorial Hospital
| | - Toshiyuki Ishikawa
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University
| | - Katsuhiko Imai
- Department of Cardiovascular Surgery, Kure Medical Center and Chugoku Cancer Center
| | - Akihiko Usui
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine
| | - Kaoru Okishige
- Department of Cardiology, Yokohama City Minato Red Cross Hospital
| | - Kengo Kusano
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | | | - Masahiko Goya
- Department of Cardiovascular Medicine, Tokyo Medical and Dental University
| | | | | | - Wataru Shimizu
- Department of Cardiovascular Medicine, Graduate School of Medicine, Nippon Medical School
| | - Morio Shoda
- Department of Cardiology, Tokyo Women's Medical University
| | - Naokata Sumitomo
- Department of Pediatric Cardiology, Saitama Medical University International Medical Center
| | - Yoshihiro Seo
- Department of Cardiology, Faculty of Medicine, University of Tsukuba
| | | | - Hiroshi Tada
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, University of Fukui
| | | | - Yuji Nakazato
- Department of Cardiovascular Medicine, Juntendo University Urayasu Hospital
| | - Takashi Nishimura
- Department of Cardiac Surgery, Tokyo Metropolitan Geriatric Hospital
| | - Takashi Nitta
- Department of Cardiovascular Surgery, Nippon Medical School
| | - Shinichi Niwano
- Department of Cardiovascular Medicine, Kitasato University School of Medicine
| | | | - Yuji Murakawa
- Fourth Department of Internal Medicine, Teikyo University Hospital Mizonokuchi
| | - Teiichi Yamane
- Department of Cardiology, Jikei University School of Medicine
| | - Takeshi Aiba
- Division of Arrhythmia, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Koichi Inoue
- Division of Arrhythmia, Cardiovascular Center, Sakurabashi Watanabe Hospital
| | - Yuki Iwasaki
- Department of Cardiovascular Medicine, Graduate School of Medicine, Nippon Medical School
| | - Yasuya Inden
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | - Kikuya Uno
- Arrhythmia Center, Chiba Nishi General Hospital
| | - Michio Ogano
- Department of Cardiovascular Medicine, Shizuoka Medical Center
| | - Masaomi Kimura
- Advanced Management of Cardiac Arrhythmias, Hirosaki University Graduate School of Medicine
| | | | - Shingo Sasaki
- Department of Cardiology and Nephrology, Hirosaki University Graduate School of Medicine
| | | | - Tsuyoshi Shiga
- Department of Cardiology, Tokyo Women's Medical University
| | - Tsugutoshi Suzuki
- Departments of Pediatric Electrophysiology, Osaka City General Hospital
| | - Yukio Sekiguchi
- Department of Cardiology, Faculty of Medicine, University of Tsukuba
| | - Kyoko Soejima
- Arrhythmia Center, Second Department of Internal Medicine, Kyorin University Hospital
| | - Masahiko Takagi
- Division of Cardiac Arrhythmia, Department of Internal Medicine II, Kansai Medical University
| | - Masaomi Chinushi
- School of Health Sciences, Faculty of Medicine, Niigata University
| | - Nobuhiro Nishi
- Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Takashi Noda
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Hitoshi Hachiya
- Department of Cardiovascular Medicine, Tsuchiura Kyodo General Hospital
| | | | | | - Yasushi Miyauchi
- Department of Cardiovascular Medicine, Nippon Medical School Chiba-Hokusoh Hospital
| | - Aya Miyazaki
- Department of Pediatric Cardiology, Congenital Heart Disease Center, Tenri Hospital
| | - Tomoshige Morimoto
- Department of Thoracic and Cardiovascular Surgery, Osaka Medical College
| | - Hiro Yamasaki
- Department of Cardiology, Faculty of Medicine, University of Tsukuba
| | | | | | - Takeshi Kimura
- Department of Cardiology, Graduate School of Medicine and Faculty of Medicine, Kyoto University
| | - Kazuo Tanemoto
- Department of Cardiovascular Surgery, Kawasaki Medical School
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6
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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: 220] [Impact Index Per Article: 55.0] [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.
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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
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7
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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.
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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
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8
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Anderson RD, Lee G, Campbell T, Bennett RG, Kizana E, Watts T, Kalman J, Kumar S. Scar nonexcitability using simultaneous pacing for substrate ablation of ventricular tachycardia. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2020; 43:1219-1234. [PMID: 32720390 DOI: 10.1111/pace.14025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 06/21/2020] [Accepted: 07/26/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To describe an expedited strategy of simultaneous high-output pacing during radiofrequency ablation to achieve scar homogenization and electrical inexcitability as an approach for substrate ablation for scar-related ventricular tachycardia (VT). BACKGROUND Scar homogenization with additional testing for electrical inexcitability is known endpoints for catheter ablation, but achieving both can be time consuming. We describe a strategy of simultaneous pacing during radiofrequency ablation to expedite this approach. METHODS AND RESULTS Ten patients (age 74 ± 6 years; all men, (LV) ejection fraction of 33% ± 8%, ischemic cardiomyopathy, 9; VT storm, 7) underwent scar homogenization with electrical inexcitability to pacing (10 mA, 9 ms pulse width), as well as noninducibility of any VT as an acute procedural endpoint. Thirty-four VTs were inducible in 10 patients with a total of 1127 ablation lesions applied. Median ablation lesions per patient were 97 (interquartile range [IQR]25-75 71-151), and the total ablation time was 49 minutes (IQR25-75 45-56 minutes) with average duration per lesion of 32.2 seconds (IQR25-75 25.8-37.8 seconds). Average power was 33 W (IQR25-75 32-38 W), average contact force was 13 g (IQR25-75 11.9-14.6 g) with a median impedance drop of 9.6 Ω/lesion (IQR25-75 8.1-10.0 Ω). There were no ventricular fibrillation episodes using this strategy. The median procedure time was 246 minutes (IQR25-75 214-293 minutes). Acute procedural success was seen in nine patients with 97% of VTs noninducible. CONCLUSION Simultaneous ablation with high output pacing to achieve scar inexcitability, when combined with scar homogenization and noninducibility of any VT may be an expeditious, safe, and effective technique for catheter ablation.
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Affiliation(s)
- Robert D Anderson
- Department of Cardiology, Royal Melbourne Hospital, Melbourne, Australia.,Faculty of Medicine, Dentistry, and Health Science, University of Melbourne, Melbourne, Victoria, Australia.,Department of Cardiology, Westmead Hospital, Sydney, Australia.,Westmead Applied Research Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Geoffrey Lee
- Department of Cardiology, Royal Melbourne Hospital, Melbourne, Australia.,Faculty of Medicine, Dentistry, and Health Science, University of Melbourne, Melbourne, Victoria, Australia
| | - Timothy Campbell
- Department of Cardiology, Westmead Hospital, Sydney, Australia.,Westmead Applied Research Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Richard G Bennett
- Department of Cardiology, Westmead Hospital, Sydney, Australia.,Westmead Applied Research Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Eddy Kizana
- Department of Cardiology, Westmead Hospital, Sydney, Australia.,Westmead Applied Research Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Troy Watts
- Department of Cardiology, Royal Melbourne Hospital, Melbourne, Australia.,Faculty of Medicine, Dentistry, and Health Science, University of Melbourne, Melbourne, Victoria, Australia
| | - Jonathan Kalman
- Department of Cardiology, Royal Melbourne Hospital, Melbourne, Australia.,Faculty of Medicine, Dentistry, and Health Science, University of Melbourne, Melbourne, Victoria, Australia
| | - Saurabh Kumar
- Department of Cardiology, Westmead Hospital, Sydney, Australia.,Westmead Applied Research Centre, University of Sydney, Sydney, New South Wales, Australia
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Li X, Li H, Ma W, Ning X, Liang E, Pang K, Yao Y, Hua W, Zhang S, Fan X. Permanent left bundle branch area pacing for atrioventricular block: Feasibility, safety, and acute effect. Heart Rhythm 2019; 16:1766-1773. [DOI: 10.1016/j.hrthm.2019.04.043] [Citation(s) in RCA: 130] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Indexed: 02/07/2023]
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10
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Comparative spatial resolution of 12-lead electrocardiography and an automated algorithm. Heart Rhythm 2019; 17:324-331. [PMID: 31493590 DOI: 10.1016/j.hrthm.2019.08.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND The spatial resolution of pacemapping using 12-lead electrocardiography (ECG) or PaSo software is unknown. OBJECTIVE The purpose of this study was to determine the spatial resolution of traditional ECG pacemapping and pacemapping using the PaSo coefficients. METHODS Seventeen patients undergoing ablation of supraventricular tachycardias or atrioventricular node were included. After ablation, chamber (right ventricular outflow tract/rest of the right ventricle/left ventricle) geometry was created with Carto 3. Pacingwas performed from any point in these cardiac regions, the QRS morphology being the template and the point being considered as arrhythmia "origin." Subsequently, pacing was performed from points around the "origin" (1538 points). The QRS of these tagged points were compared by traditional ECG pacemapping and PaSo coefficients. The spatial resolution was calculated using correlations between the distance away from the origin (measured by 3 computational methods) and traditional ECG pacemapping and PaSo coefficients, independently. RESULTS A 0.01-unit decrease in the PaSo coefficient resulted in 1.1 mm increased Cartesian distance (95% confidence interval [CI] 0.9-1.3 mm; P < .001) and 2.4 mm increased geodesic distance (95% CI 1.9-2.9 mm; P < .001) and 664 mm3 increase in convex hull volume (95% CI 423-906 mm3; P < .0001). For traditional ECG pacemapping, each decrease in lead match resulted in 1.7 mm increased Cartesian distance (95% CI 1.5-2.0 mm; P < .001) and 3.4 mm increased geodesic distance (95% CI 2.8-4.1 mm; P < .001) and 712 mm3 increase in convex hull volume (95% CI 599-830 mm3; P < .0001). Both PaSo coefficients and traditional pacemapping showed a significant inverse linear correlation with distance from the "origin." CONCLUSION The resolution of mapping using the Paso software is better than that of traditional pacemapping.
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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: 179] [Impact Index Per Article: 35.8] [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.
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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
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Hayashi K, Mathew S, Heeger CH, Maurer T, Lemes C, Riedl J, Sohns C, Saguner AM, Santoro F, Reißmann B, Metzner A, Kuck KH, Ouyang F. Pace Mapping for the Identification of Focal Atrial Tachycardia Origin: A Novel Technique to Map and Ablate Difficult-to-Induce and Nonsustained Focal Atrial Tachycardia. Circ Arrhythm Electrophysiol 2017; 9:CIRCEP.116.003930. [PMID: 27390210 DOI: 10.1161/circep.116.003930] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 05/31/2016] [Indexed: 11/16/2022]
Abstract
BACKGROUND Focal atrial tachycardia (FAT) is extremely difficult to map and ablate when it is difficult to induce and nonsustained. The objective of this study is to evaluate the efficacy of pace mapping in identifying the FAT origin. METHODS AND RESULTS The study included 7 patients with drug-refractory FAT who experienced daily multiple episodes before ablation and presented with difficult-to-induce and nonsustained FAT and a distinct P wave morphology. Pace mapping was systematically performed in the areas of interest using 3-dimensional mapping to match the P wave morphology and paced intracardiac activation sequence recorded from multiple catheters. The anatomic origins of FAT were the right pulmonary vein (PV) in 3 patients, mitral annulus, crista terminalis, tricuspid annulus, and right-sided PV via a posterior conduction of previous PV isolation. In all patients, pace mapping obtained best-matched P wave morphology in ≥11/12 leads of surface ECG at the successful ablation site, and paced intracardiac activation sequence was identical to that of induced FAT. Focal ablation was delivered in 4 patients, including non-PV FAT in 3 and FAT in 1, via posterior gap along the previous right-sided PV isolation, and circumferential right-sided PV isolation was performed in the other 3 patients. No FAT was induced at the end of the procedure. All patients were free of arrhythmias without antiarrhythmic drugs during the 8.4±5.6-month follow-up. CONCLUSIONS The combination of paced P wave morphology and intracardiac activation sequence can be used for the identification of FAT origin in patients with difficult-to-induce and nonsustained FAT.
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Affiliation(s)
- Kentaro Hayashi
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany.
| | - Shibu Mathew
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Christian-H Heeger
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Tilman Maurer
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Christine Lemes
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Johannes Riedl
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Christian Sohns
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Ardan M Saguner
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Francesco Santoro
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Bruno Reißmann
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Andreas Metzner
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Karl-Heinz Kuck
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
| | - Feifan Ouyang
- From the Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany
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13
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Xue Y, Zhan X, Wu S, Wang H, Liu Y, Liao Z, Deng H, Duan X, Zeng S, Liang D, Elvan A, Fang X, Liao H, Ramdat Misier AR, Smit JJJ, Metzner A, Heeger CH, Liu F, Wang F, Zhang Z, Kuck KH, Yen Ho S, Ouyang F. Experimental, Pathologic, and Clinical Findings of Radiofrequency Catheter Ablation of Para-Hisian Region From the Right Ventricle in Dogs and Humans. Circ Arrhythm Electrophysiol 2017. [DOI: 10.1161/circep.116.005207] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Ablation of para-Hisian accessory pathway (AP) poses high risks of atrioventricular block. We developed a pacing technique to differentiate the near-field (NF) from far-field His activations to avoid the complication.
Methods and Results—
Three-dimensional mapping of the right ventricle was performed in 15 mongrel dogs and 23 patients with para-Hisian AP. Using different pacing outputs, the NF- and far-field His activation was identified on the ventricular aspect. Radiofrequency application was delivered at the NF His site in 8 (group 1) and the far-field His site in 7 dogs (group 2), followed by pathologic examination after 14 days. NF His activation was captured with 5 mA/1 ms in 10 and 10 mA/1 ms in 5 dogs. In group 1, radiofrequency delivery resulted in complete atrioventricular block in 3, right bundle branch block with HV (His-to-ventricular) interval prolongation in 1, and only right bundle branch block in 2 dogs, whereas no changes occurred in group 2. Pathologic examination in group-1 dogs showed complete or partial necrosis of the His bundle in 4 and complete necrosis of the right bundle branch in 5 dogs. In group 2, partial necrosis in the right bundle branch was found only in 1 dog. Using this pacing technique, the APs were 5.7±1.2 mm away from the His bundle located superiorly in 20 or inferiorly in 3 patients. All APs were successfully eliminated with 1 to 3 radiofrequency applications. No complications and recurrence occurred during a follow-up of 11.8±1.4 months.
Conclusions—
Differentiating the NF His from far-field His activations led to a high ablation success without atrioventricular block in para-Hisian AP patients.
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Affiliation(s)
- Yumei Xue
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Xianzhang Zhan
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Shulin Wu
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Hongyue Wang
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Yang Liu
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Zili Liao
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Hai Deng
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Xuejing Duan
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Shaoying Zeng
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Dongpo Liang
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Arif Elvan
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Xianhong Fang
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Hongtao Liao
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Anand R. Ramdat Misier
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Jaap Jan J. Smit
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Andreas Metzner
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Christian-Hendrik Heeger
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Fangzhou Liu
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Feng Wang
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Zhiwei Zhang
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Karl-Heinz Kuck
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Siew Yen Ho
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
| | - Feifan Ouyang
- From the Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, China (Y.X., X.Z., S.W., Y.L., Z.L., H.D., S.Z., D.L., X.F., H.L., F.L., F.W., Z.Z.); Department of Pathology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing (H.W., X.D.); Department of Cardiology, Isala Klinieken, Zwolle, The Netherlands (A
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Pace mapping in the atrium using bipolar electrograms from widely spaced electrodes. J Arrhythm 2015; 31:274-8. [PMID: 26550082 DOI: 10.1016/j.joa.2015.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 02/10/2015] [Accepted: 02/23/2015] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Pace mapping is a useful tool but is of limited utility for the atrium because of poor spatial resolution. We investigated the use of bipolar electrograms recorded from widely spaced electrodes in order to improve the resolution of pace mapping. METHODS This prospective study included patients undergoing a clinical electrophysiology study. Unipolar pacing from either the superior or inferior lateral right atrium was performed to simulate atrial tachycardia. Twelve-lead electrocardiograms were recorded during pacing as a template. In addition, three intracardiac bipolar electrograms from a set of widely spaced electrodes were also recorded. Subsequently, unipolar pacing was performed from electrodes at known distances from the initial pacing site, and the morphology of P waves in the electrocardiogram and bipolar electrograms were compared with that of the template. Morphological comparison was performed by a cardiologist and by automated computerized matching. Spatial resolution was calculated as the minimum distance at which there was no match. RESULTS Fifteen patients participated in the study. Distance at which differences in morphology were noted was smaller in the bipolar electrograms compared to that indicated by P waves in the electrocardiogram, when matched by the cardiologist (6.1±3.8 mm vs. 9.9±5.2 mm, p=0.012) or by automated analysis (4±0 mm vs. 9.9±4 mm, p<0.001). CONCLUSIONS Use of three bipolar electrograms recorded from a set of widely spaced electrodes in the right atrium improves the resolution of pace mapping compared to that using P waves from surface electrocardiograms alone.
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de Chillou C, Groben L, Magnin-Poull I, Andronache M, Abbas MM, Zhang N, Abdelaal A, Ammar S, Sellal JM, Schwartz J, Brembilla-Perrot B, Aliot E, Marchlinski FE. Localizing the critical isthmus of postinfarct ventricular tachycardia: The value of pace-mapping during sinus rhythm. Heart Rhythm 2014; 11:175-81. [DOI: 10.1016/j.hrthm.2013.10.042] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Indexed: 11/27/2022]
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Pacing polarity and left ventricular mechanical activation sequence in cardiac resynchronization therapy. J Interv Card Electrophysiol 2012; 35:101-7. [PMID: 22580715 DOI: 10.1007/s10840-012-9686-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Accepted: 04/05/2012] [Indexed: 10/28/2022]
Abstract
OBJECTIVE The aim of this study is to evaluate the relationship between polarity of left ventricular (LV) pacing and the resultant regional, global, and transmural mechanical sequence of contraction. BACKGROUND Cardiac resynchronization therapy (CRT) is widely utilized in patients with drug refractory congestive heart failure with systolic dysfunction (EF <35 %) and intraventricular conduction delay (QRS duration >120 ms). However, little is known about polarity of pacing stimulation and the resultant differences in LV mechanics. METHODS The polarity of pacing was altered sequentially in 20 patients (73 ± 13, 16 males) with preexisting biventricular devices with potential choice of multiple vectors for pacing stimulation. Initial unipolar or extended bipolar configurations were switched to bipolar configuration or vice versa, and echocardiographic images were acquired for off-line analysis. Regional and global LV longitudinal and radial mechanics were assessed selectively from the subendocardial and subepicardial regions with 2D speckle-tracking echocardiography. Left ventricular capture by each vector configuration was confirmed by local lead capture and appropriate QRS alteration. RESULTS Unipolar pacing resulted in increased dispersion of LV regional endocardial strains with a higher base-to-apex gradients of longitudinal shortening strains (P < 0.05). LV longitudinal shortening strain magnitude was higher at LV base with bipolar stimulation in comparison with unipolar stimulation (-10.5 ± 10.5 vs. -4.2 ± 6.3, P = 0.02). CONCLUSION There is a difference in the mechanical activation sequence of the LV between unipolar vs. bipolar pacing stimulation. This may have important implications for CRT.
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Chemello D, Subramanian A, Downar E. Two different pace maps at a single site: what is the mechanism? Heart Rhythm 2010; 8:634-5. [PMID: 20470903 DOI: 10.1016/j.hrthm.2010.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Indexed: 11/18/2022]
Affiliation(s)
- Diego Chemello
- Toronto General Hospital, University Health Network, Toronto, Ontario, Canada
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Natale A, Raviele A, Al-Ahmad A, Alfieri O, Aliot E, Almendral J, Breithardt G, Brugada J, Calkins H, Callans D, Cappato R, Camm JA, Della Bella P, Guiraudon GM, Haïssaguerre M, Hindricks G, Ho SY, Kuck KH, Marchlinski F, Packer DL, Prystowsky EN, Reddy VY, Ruskin JN, Scanavacca M, Shivkumar K, Soejima K, Stevenson WJ, Themistoclakis S, Verma A, Wilber D. Venice Chart International Consensus document on ventricular tachycardia/ventricular fibrillation ablation. J Cardiovasc Electrophysiol 2010; 21:339-79. [PMID: 20082650 DOI: 10.1111/j.1540-8167.2009.01686.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Andrea Natale
- Texas Cardiac Arrhythmia Institute, St. David's Medical Center, Austin, TX, USA
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Aliot EM, Stevenson WG, Almendral-Garrote JM, Bogun F, Calkins CH, Delacretaz E, Bella PD, Hindricks G, Jais P, Josephson ME, Kautzner J, Kay GN, Kuck KH, Lerman BB, Marchlinski F, Reddy V, Schalij MJ, Schilling R, Soejima K, Wilber D. EHRA/HRS Expert Consensus on Catheter Ablation of Ventricular Arrhythmias: Developed in a partnership with the European Heart Rhythm Association (EHRA), a Registered Branch of the European Society of Cardiology (ESC), and the Heart Rhythm Society (HRS); in collaboration with the American College of Cardiology (ACC) and the American Heart Association (AHA). Europace 2009; 11:771-817. [DOI: 10.1093/europace/eup098] [Citation(s) in RCA: 283] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Raymond JM, Sacher F, Winslow R, Tedrow U, Stevenson WG. Catheter Ablation for Scar-related Ventricular Tachycardias. Curr Probl Cardiol 2009; 34:225-70. [DOI: 10.1016/j.cpcardiol.2009.01.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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Datino T, Almendral J, Gonzalez-Torrecilla E, Atienza F, Garcia-Fernandez FJ, Arenal A, Atea L, Fernandez-Aviles F. Rate-related changes in QRS morphology in patients with fixed bundle branch block: implications for differential diagnosis of wide QRS complex tachycardia. Eur Heart J 2008; 29:2351-8. [DOI: 10.1093/eurheartj/ehn340] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Spatial resolution of pace mapping of idiopathic ventricular tachycardia/ectopy originating in the right ventricular outflow tract. Heart Rhythm 2008; 5:339-44. [DOI: 10.1016/j.hrthm.2007.11.011] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2007] [Accepted: 02/18/2008] [Indexed: 11/18/2022]
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Azegami K, Wilber DJ, Arruda M, Lin AC, Denman RA. Spatial Resolution of Pacemapping and Activation Mapping in Patients with Idiopathic Right Ventricular Outflow Tract Tachycardia. J Cardiovasc Electrophysiol 2005; 16:823-9. [PMID: 16101622 DOI: 10.1111/j.1540-8167.2005.50041.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND The purpose of this study was to compare the spatial resolution of activation mapping and pacemapping in patients undergoing ablation of idiopathic ventricular tachycardia (VT) arising from the right ventricular outflow tract (RVOT). A direct comparison of the two techniques has not been undertaken. METHODS AND RESULTS Electroanatomical activation maps of the RVOT were obtained during VT in 15 patients. Pacemaps were obtained from multiple sites, tagged on the activation map, and scored according the degree of concordance between the paced QRS configuration and that of VT. The site of successful ablation was considered the VT site of origin. Initial endocardial activation away from the site of origin was rapid; the mean area of myocardium activated within the first 10 msec (early activation area, EAA) was 3.0 +/- 1.6 cm(2) (range: 1.3-6.4 cm(2)). Best pacemap scores were always obtained adjacent to the site of origin. Pacemap concordance, and the probability of an exact pacemap match significantly decreased with increasing distance of the pacing site from the site of origin (P < 0.01). All patients had more than one pacing site yielding a best pacemap score. The greatest distance between such sites in an individual patient ranged from 11 to 26 mm (mean: 18 +/- 5 mm), and was strongly correlated with the size of the EAA (r = 0.77, P < 0.001). CONCLUSIONS Pacemapping and activation mapping provide similar localizing information. The spatial resolution of each technique is modest, varies between patients, and may be optimized by three-dimensional data display.
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Affiliation(s)
- Koji Azegami
- Cardiovascular Institute, Loyola University Medical Center, Maywood, Illinois, USA
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Brunckhorst CB, Delacretaz E, Soejima K, Maisel WH, Friedman PL, Stevenson WG. Identification of the Ventricular Tachycardia Isthmus After Infarction by Pace Mapping. Circulation 2004; 110:652-9. [PMID: 15289385 DOI: 10.1161/01.cir.0000138107.11518.af] [Citation(s) in RCA: 137] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Ventricular tachycardia (VT) isthmuses can be defined by fixed or functional block. During sinus rhythm, pace mapping near the exit of an isthmus should produce a QRS similar to that of VT. Pace mapping at sites proximal to the exit may produce a similar QRS with a longer stimulus-to-QRS interval (S-QRS). The aim of the study was to determine whether a VT isthmus could be identified and followed by pace mapping.
Methods and Results—
Left ventricular pace mapping during sinus rhythm was performed at 819 sites in 11 patients with VT late after infarction, and corresponding CARTO maps were reconstructed. An isthmus site was defined by entrainment and/or VT termination by ablation. Pace-mapping data were analyzed from the identified isthmus site and from sites at progressively increasing distances from this initial isthmus site. Sites where pace mapping produced the same QRS with different S-QRS delays were identified to attempt to trace the course of the isthmus. In 11 patients, 13 confluent low-voltage infarct regions were present. In all these regions, parts of VT isthmuses were identified by pace mapping. In 11 of 13 of the identified isthmus parts, the QRS morphology of the pace map matched a VT QRS. In 10 of 11 patients, radiofrequency ablation rendered clinical VTs noninducible. Successful ablation sites were localized within an isthmus identified by pace mapping in all of these 10 patients.
Conclusions—
VT isthmuses can be identified and part of their course delineated by pace mapping during sinus rhythm. This method could help target isthmus sites for ablation during stable sinus rhythm.
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Affiliation(s)
- Corinna B Brunckhorst
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass, USA.
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Perez-Castellano N, Almendral J, Villacastin J, Arenal A, Gonzalez S, Moreno J, Morales R, Macaya C. Basic assessment of paced activation sequence mapping: implications for practical use. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2004; 27:651-6. [PMID: 15125723 DOI: 10.1111/j.1540-8159.2004.00501.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Some experiences support the use of atrial paced activation sequence mapping, but there is no systematic study assessing its spatial resolution, reproducibility, and influence of pacing parameters. The aim of this study was to evaluate these issues by using a 24-pole catheter positioned at the atrial aspect of the tricuspid and mitral annuli in 15 patients. Bipolar pacing was performed at two sites (right and left atria), 2 cycle lengths (300 and 500 ms) and two outputs (twice and tenfold the late diastolic threshold voltage for 2-ms pulses). The elapsed time between the atrial activation at the two dipoles adjacent to the pacing dipole (activation time [AT]) was measured during each pacing sequence. Changes in cycle length did not modify the AT. The increase in voltage slightly modified the AT (maximum -2 ms at the RA; 95% CI -3 to -1 ms) due to a greater shortening of the conduction time to the dipole located next to the anode. The 95% limits of the intraobserver and interobserver agreements in the AT measurement were -2 to 3 ms and -3 to 3 ms, respectively. The spatial resolution was studied in ten patients by measuring the AT during pacing from each dipole of a 20-pole catheter with a 1-3-1 mm interelectrode distance. The mean AT change was 10 +/- 4 ms per 6 mm of pacing site displacement (95% CI 8-11 ms, range 2.5-20 ms). In conclusion, paced atrial activation sequence analysis is reproducible, accurate, and relatively independent of pacing parameters.
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Soejima Y, Aonuma K, Iesaka Y, Isobe M. Ventricular Unipolar Potential in Radiofrequency Catheter Ablation of Idiopathic Non-Reentrant Ventricular Outflow Tachycardia. ACTA ACUST UNITED AC 2004; 45:749-60. [PMID: 15557716 DOI: 10.1536/jhj.45.749] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We conducted this study to verify the efficacy of ventricular unipolar potential (V-uni) for ablation of idiopathic non-reentrant ventricular tachycardia (idio-VT). The morphology of V-uni at the successful and unsuccessful sites was analyzed in 27 patients with idio-VT [20 with right ventricular outflow tachycardia (RVOVT) and 7 with left ventricular outflow tachycardia (LVOVT)]. The usefulness of V-uni was compared with a pacemapping method and the V-QRS interval. The incidence of QS-pattern V-uni at the successful and best unsuccessful sites were 100 versus 25% (P = 0.000005) in RVOVT and 86 versus 29% (P = 0.10) in LVOVT. The pacemapping scores at the successful and best unsuccessful sites were 11.5/12 versus 11.2/12; NS in RVOVT, and 11.2/12 versus 11.1/12; NS in LVOVT. The mean V-QRS interval at the successful and the best unsuccessful sites were 22.5 +/- 3.8 versus 21.6 +/- 3.4 msec; NS in RVOVT, 15.1 +/- 3.2 versus 12.5 +/- 3.3 msec; NS in LVOVT. The sensitivity (sen) and specificity (spe) of QS-pattern V-uni to determine the optimum target sites were 1.0 and 0.89 in RVOVT and 0.86 and 0.83 in LVOVT, respectively. In the ablation of idio-VT, QS-pattern V-uni is simply and visually identifiable, is very useful, and should be given a high priority when determining the optimum target site.
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Affiliation(s)
- Yohkoh Soejima
- Department of Cardiology, Ohme Municipal General Hospital, Tokyo 198-0042, Japan
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Brunckhorst CB, Stevenson WG, Soejima K, Maisel WH, Delacretaz E, Friedman PL, Ben-Haim SA. Relationship of slow conduction detected by pace-mapping to ventricular tachycardia re-entry circuit sites after infarction. J Am Coll Cardiol 2003; 41:802-9. [PMID: 12628726 DOI: 10.1016/s0735-1097(02)02932-7] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVES This study sought to characterize the relationship of conduction delays detected by pace-mapping, evident as a stimulus to QRS interval (S-QRS) delay >or=40 ms, to ventricular tachycardia (VT) re-entry circuit isthmuses defined by entrainment and ablation. BACKGROUND Areas of slow conduction and block in old infarcts cause re-entrant VT. METHODS In 12 patients with VT after infarction, pace-mapping was performed at 890 sites. Stimulus to QRS intervals were measured and plotted in three-dimensional reconstructions of the left ventricle. Conduction delay was defined as >or=40 ms and marked delay as >80 ms. The locations of conduction delays were compared to the locations of 14 target areas, defined as the region within a radius of 2 cm of a re-entry circuit isthmus. RESULTS Pacing captured at 829 sites; 465 (56%) had no S-QRS delay, 364 (44%) had a delay >or=40 ms, and 127 (15%) had a delay >80 ms. Sites with delays were clustered in 14 discrete regions, 13 of which overlapped target regions. Only 1 of the 14 target regions was not related to an area of S-QRS delay. Sites with marked delays >80 ms were more often in the target (52%) than sites with delays 40 to 80 ms (29%) (p < 0.0001). CONCLUSIONS Identification of abnormal conduction during pace-mapping can be used to focus mapping during induced VT to a discrete region of the infarct. Further study is warranted to determine if targeting regions of conduction delay may allow ablation of VT during stable sinus rhythm without mapping during VT.
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Goyal R, Mukhopadhyay PS, Syed ZA, Knight BP, Bahu M, Weiss R, Daoud EG, Man KC, Strickberger SA, Morady F. Effect of isoproterenol on QRS complex morphology during ventricular pacing: implications for pace mapping. J Electrocardiol 1998; 31:133-6. [PMID: 9588659 DOI: 10.1016/s0022-0736(98)90044-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Ventricular pace mapping may be used to identify the site of origin of idiopathic ventricular tachycardia. Isoproterenol is often required to induce this type of ventricular tachycardia, but its effect on QRS morphology during pace mapping is unknown. Therefore, this study was performed to evaluate the effect of isoproterenol on QRS morphology during ventricular pacing. The study population consisted of 20 patients (mean age 38 +/- 14 years) undergoing a clinically indicated electrophysiology procedure. Ventricular overdrive pacing was performed in trains of 12 stimuli at cycle lengths of 400, 350, 300, and 250 ms, first in the baseline state during an infusion of isoproterenol, and again after isoproterenol washout. Pacing was performed at the right ventricular apex in 10 patients, in the right ventricular outflow tract in 6 patients, and in the left ventricle in 4 patients. Visual evaluation revealed no apparent effects of isoproterenol on QRS morphology at any of the three pacing sites or at any of the pacing cycle lengths. It was concluded that QRS morphology during ventricular pacing is not affected by isoproterenol infusion. Therefore, in patients with idiopathic ventricular tachycardia, even if the induction of tachycardia requires infusion of isoproterenol, successful pace mapping may be performed in its absence.
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Affiliation(s)
- R Goyal
- Department of Internal Medicine, the University of Michigan Medical Center, Ann Arbor, USA
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Man KC, Daoud EG, Knight BP, Bahu M, Weiss R, Zivin A, Souza SJ, Goyal R, Strickberger SA, Morady F. Accuracy of the unipolar electrogram for identification of the site of origin of ventricular activation. J Cardiovasc Electrophysiol 1997; 8:974-9. [PMID: 9300293 DOI: 10.1111/j.1540-8167.1997.tb00619.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION The purpose of this study was to determine the accuracy of the unipolar electrogram for identifying the earliest site of ventricular activation. The earliest site of ventricular activation may be identified with the unipolar electrogram by the absence of an R wave. However, the accuracy of this technique is unknown. METHODS AND RESULTS A single ventricular premature complex was induced mechanically at the tip of an electrode catheter to simulate a ventricular premature depolarization site of origin. Unipolar electrograms were recorded from the right ventricular septum at the tip electrode and at 2, 5, 8, and 11 mm from the electrode tip in 20 patients. No R waves were detected at the ventricular premature depolarization site of origin. R waves were detected in 4 of 20 patients (20%) at 2 mm from the tip electrode and 7 of 20 patients (35%) at 5, 8, and 11 mm from the tip electrode. An R wave was not observed at distances < or = 11 mm from the site of tachycardia origin in 13 of 20 patients (65%). CONCLUSIONS While an R wave in the unipolar electrogram can be seen as close as 2 mm from the site of impulse origin, the absence of an R wave as an indicator of the site of impulse origin in the right ventricle is highly inaccurate. Therefore, the absence of an R wave in the unipolar electrogram is unlikely to be an adequate guide for identification of an effective target site for ablation of right ventricular tachycardia.
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Affiliation(s)
- K C Man
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor 48109-0022, USA
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Stellbrink C, Diem B, Schauerte P, Ziegert K, Hanrath P. Transcoronary venous radiofrequency catheter ablation of ventricular tachycardia. J Cardiovasc Electrophysiol 1997; 8:916-21. [PMID: 9261718 DOI: 10.1111/j.1540-8167.1997.tb00853.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Ventricular tachycardias in coronary artery disease arise mostly from endocardial sites. However, little is known about the site of origin in other diseases. We present the case of an incessant, adenosine-sensitive ventricular tachycardia arising from the lateral wall of the left ventricle in a patient with mildly reduced left ventricular function. Intracardiac mapping suggested an epicardial origin, and the tachycardia was successfully ablated from a coronary sinus branch. After ablation, left ventricular function returned to normal. Transcoronary venous radiofrequency catheter ablation is a new approach for the treatment of ventricular tachycardia. Its value in the management of other types of ventricular tachycardia has yet to be determined.
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Molin F, Savard P, Dubuc M, Kus T, Tremblay G, Nadeau R. Spatial resolution and role of pacemapping during ablation of accessory pathways. Pacing Clin Electrophysiol 1997; 20:683-94. [PMID: 9080495 DOI: 10.1111/j.1540-8159.1997.tb03887.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The objectives of this study were: (1) to evaluate quantitatively the spatial resolution of pacemapping; and (2) to assess the predictive value and role of pacemapping for the catheter ablation of overt APs. Sixty-three unipolar leads were used instead of the standard 12-lead ECG to acquire more information and assess the intrinsic accuracy of pacemapping. Spatial resolution was evaluated in 19 patients for whom data were recorded during bipolar ventricular pacing near the AV ring using the three electrode pairs of a quadripolar ablation catheter with a 5-mm interelectrode spacing. The predictive value was assessed in 27 patients with overt APs who underwent RF ablation; their data were recorded during pacing at the site of successful ablation and at one or two sites where RF energy delivery was ineffective. Data from different beats were compared visually by using body surface potential maps and quantitatively by computing average correlation coefficients (r). Reproducibility was high for paced beats (r = 0.98 +/- 0.02). Displacements of 5 mm of the pacing site could be detected with a sensitivity of 90% and a specificity of 87%. Correlation between pacing at successful ablation sites and preexcited sinus rhythm was low (r = 0.79 +/- 0.11) and the ablation outcome could be predicted with a negative prediction accuracy of 87% and a positive prediction accuracy of 49%. Despite an excellent spatial resolution, pacemapping is of limited value for the identification of successful AP ablation sites, probably because APs can be interrupted at some distance from their ventricular insertion point.
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Affiliation(s)
- F Molin
- Research Center, Hôpital du Sacré-Coeur de Montréal, Québec, Canada.
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Man KC, Chan KK, Kovack P, Goyal R, Bogun F, Harvey M, Daoud E, Strickberger A, Morady F. Spatial resolution of atrial pace mapping as determined by unipolar atrial pacing at adjacent sites. Circulation 1996; 94:1357-63. [PMID: 8822993 DOI: 10.1161/01.cir.94.6.1357] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND The purpose of this study was to examine the spatial resolution of unipolar atrial pace mapping by pacing at adjacent sites within the coronary sinus and the right atrium. METHODS AND RESULTS Unipolar pacing from each pole of a quadripolar catheter was performed in the coronary sinus (n = 29) and in the right atrium (n = 10). Pacing from the distal electrode was used to simulate the site of origin of an atrial tachycardia. These P waves were compared with the P waves generated by unipolar pacing from each of the three proximal electrodes. The P waves were analyzed for changes in amplitude, duration, and configuration. Pacing within the coronary sinus resulted in significant changes in amplitude and duration at distances of 17 and 21 mm from the distal pole, respectively. Similarly, pacing in the right atrium resulted in significant changes in amplitude and duration at distances of 17 and 32 mm from the distal pole, respectively. No significant changes in configuration were noted in the coronary sinus in any lead at packing sites < or = 32 mm from the distal pole. Configurational changes were noted in the right atrium at pacing sites 17 mm from the distal pole. CONCLUSIONS The spatial resolution of unipolar atrial pace mapping is approximately 17 mm. These findings indicate that mapping techniques that depend on the accurate discrimination of P-wave morphology, such as pace mapping or concealed entertainment, are likely to be imprecise when used in the atria.
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Affiliation(s)
- K C Man
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor 48109-0022, USA
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Stevenson WG, Sager PT, Natterson PD, Saxon LA, Middlekauff HR, Wiener I. Relation of pace mapping QRS configuration and conduction delay to ventricular tachycardia reentry circuits in human infarct scars. J Am Coll Cardiol 1995; 26:481-8. [PMID: 7608454 DOI: 10.1016/0735-1097(95)80026-d] [Citation(s) in RCA: 156] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVES This study sought to determine the relation of the paced QRS configuration and conduction delay during pace mapping to reentry circuit sites in patients with ventricular tachycardia late after myocardial infarction. BACKGROUND The QRS configuration produced by ventricular pacing during sinus rhythm (pace mapping) can locate focal idiopathic ventricular tachycardias during catheter mapping, but postinfarction reentry circuits may be relatively large and contain regions of slow conduction. We hypothesized that for postinfarction ventricular tachycardia, 1) pacing during sinus rhythm at reentry circuit sites distant from the exit from the scar would produce a QRS configuration different from the tachycardia; and 2) a stimulus to QRS delay during pace mapping may be a useful guide to reentry circuit slow conduction zones. METHODS Catheter mapping and ablation were performed in 18 consecutive patients with ventricular tachycardia after myocardial infarction. At 85 endocardial sites in 13 patients, 12-lead electrocardiograms (ECGs) were recorded during pace mapping, and participation of each site in a reentry circuit was then evaluated by entrainment techniques during induced ventricular tachycardia or by application of radiofrequency current. RESULTS Pace maps resembled tachycardia at < 30% of likely reentry circuit sites identified by entrainment criteria and at only 1 (9%) of 11 sites where radiofrequency current terminated tachycardia. Analysis of the stimulus to QRS interval during entrainment with concealed fusion showed that the conduction time from the pacing site to the exit from the scar was longer at sites where the pace map did not resemble tachycardia. Evidence of slow conduction during pace mapping, with a stimulus to QRS interval > 40 ms was observed at > or = 70% of reentry circuit sites. CONCLUSIONS At many sites in postinfarction ventricular reentry circuits, the QRS configuration during pace mapping does not resemble the ventricular tachycardia QRS complex, consistent with relatively large reentry circuits or regions of functional conduction block during ventricular tachycardia. A stimulus to QRS delay during pace mapping is consistent with slow conduction and may aid in targeting endocardial sites for further evaluation during tachycardia.
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Affiliation(s)
- W G Stevenson
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
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Abstract
The role and success rate of catheter ablation for monomorphic ventricular tachycardia (VT) depend on the mechanism and origin of the tachycardia (i.e., myocardial versus His-Purkinje system) and whether it occurs in the presence or absence of structural heart diseases. For sustained bundle-branch reentry, a form of VT associated with structural heart disease, radiofrequency catheter ablation of the right bundle-branch can be performed readily and is highly successful in eliminating this arrhythmia. Because of modest success rates of catheter ablation of VT associated with a prior infarction (between 17% and 75%), this treatment modality is usually considered for cases refractory to drug therapy and should be viewed as adjunctive therapy. The target for ablation is a critical area of slow conduction, which is selected based on earliest endocardial activation, mid-diastolic potentials, concealed entrainment, or pace mapping. Radiofrequency catheter ablation may be the treatment of choice in patients with VT and no apparent structural heart disease; this is especially true for young patients who would otherwise require long-life antiarrhythmic therapy. Success rates between 75% and 100% have been reported, especially when the origin is in the right ventricular outflow tract.
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Affiliation(s)
- Z Blanck
- Electrophysiology Laboratory, Sinai Samaritan Medical Center, Milwaukee Campus/University of Wisconsin Medical School 53233
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Calkins H, Kalbfleisch SJ, el-Atassi R, Langberg JJ, Morady F. Relation between efficacy of radiofrequency catheter ablation and site of origin of idiopathic ventricular tachycardia. Am J Cardiol 1993; 71:827-33. [PMID: 8456762 DOI: 10.1016/0002-9149(93)90832-w] [Citation(s) in RCA: 146] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The results of radiofrequency catheter ablation of ventricular tachycardia (VT) in patients without structural heart disease are reported. Particular attention was focused on the relation between efficacy and the site of origin of the VT. Eighteen consecutive patients (5 women and 13 men; mean age 41 +/- 13 years) with idiopathic VT underwent catheter ablation using radiofrequency energy. Sites for radiofrequency energy delivery were selected on the basis of pace mapping. A follow-up electrophysiologic test was performed 1 to 3 months after the ablation procedure. Twenty VTs were induced. Radiofrequency catheter ablation was successful in eliminating all 10 VTs originating from the right ventricular outflow tract, and 5 of 10 from other sites in the left or right ventricle. There were no complications. The duration of ablation sessions was shorter, the frequency of identifying a site resulting in an identical pace map was higher, and the efficacy of catheter ablation was greater for VTs originating from the right ventricular outflow tract than for those from other locations. The results of this study demonstrate that radiofrequency catheter ablation of idiopathic VT is safe and effective. The efficacy of the procedure is dependent on the site of origin of the VT, with the efficacy being greater for VTs originating from the outflow tract of the right ventricle than for those from other locations.
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Affiliation(s)
- H Calkins
- Division of Cardiology, University of Michigan Medical Center, Ann Arbor
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Chinushi M, Aizawa Y, Funazaki T, Tamura M, Shibata A. Frequency and output-dependent change in conduction over slow pathways in a patient with sustained ventricular tachycardia unrelated to coronary artery disease. Pacing Clin Electrophysiol 1992; 15:756-61. [PMID: 1382278 DOI: 10.1111/j.1540-8159.1992.tb06842.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In a patient with sustained ventricular tachycardia, we obtained two different paced QRS morphologies from a single pacing site. In one QRS morphology the stimulus to the QRS complex was long, 150 msec, and in the other it was 100 msec. At the paced cycle length of 600 msec and the stimulus output of 4 V, one QRS morphology with the stimulus to the onset of QRS activation (St-QRS) interval of 150 msec was observed. At the paced cycle length of 400 msec, the other QRS morphology with a St-QRS interval of 100 msec was observed alternatively with the former. At the paced cycle length of 353 msec or 316 msec, the latter with a shorter St-QRS interval was exclusively observed. When the stimulus output was increased from 4 to 10 V, keeping with the paced cycle length at 400 msec, the St-QRS interval was shortened from 100 to 80 msec. For the two QRS morphologies with two St-QRS intervals, two slowly conducting pathways would be responsible. The site of the block in the faster pathway must be located at the proximity of the pacing site and the conduction at a shorter paced cycle length would be explained by "supernormal conduction."
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Affiliation(s)
- M Chinushi
- First Department of Internal Medicine, Niigata University School of Medicine, Japan
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