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Miyamoto M, Morita H, Mizuno T, Masuda T, Ueoka A, Asada S, Kawada S, Nakagawa K, Nishii N. Significance of left posterior extension of early repolarization in patients with J-wave syndrome. Heart Rhythm 2023; 20:1729-1736. [PMID: 37634559 DOI: 10.1016/j.hrthm.2023.08.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/22/2023] [Accepted: 08/22/2023] [Indexed: 08/29/2023]
Abstract
BACKGROUND J waves in the inferior or lateral leads are characteristic electrocardiographic (ECG) changes in patients with early repolarization syndrome (ERS). However, the presence of J waves in the left posterior region has not yet been evaluated. OBJECTIVE The purpose of this study was to clarify the significance of J waves in the posterior left ventricle using leads V7-V9 and a body surface mapping (BSM) system. METHODS Forty patients diagnosed with ERS were included. All patients exhibited J waves in either the contiguous inferior, lateral, or posterior leads. We evaluated the incidence of J waves in the inferolateral and posterior leads using a 15-lead ECG with synthesized V7-V9 and an 87-lead BSM. Additionally, we assessed the arrhythmogenicity of the posterior regions based on the morphology of the premature ventricular complexes (PVCs) associated with ventricular fibrillation (VF). RESULTS J waves were observed in the lateral, inferior, and posterior leads of 26 (65%), 31 (78%), and 39 (97%) patients, respectively. J waves were found only in the posterior leads of 5 patients. BSM was evaluated in 9 patients, all of whom exhibited a positive area on the posterior region. PVCs associated with VF were recorded in 5 patients. Among patients with inferolateral and posterior J waves, all except 1 patient who displayed left bundle branch block morphology showed PVCs originating from the posterior left ventricular region. CONCLUSION Posterior J waves are common in ERS patients. This abnormality can be detected using leads V7-V9 and the BSM system and may be associated with arrhythmogenesis.
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Affiliation(s)
- Masakazu Miyamoto
- Department of Cardiovascular Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan
| | - Hiroshi Morita
- Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
| | - Tomofumi Mizuno
- Department of Cardiovascular Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan
| | - Takuro Masuda
- Department of Cardiovascular Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan
| | - Akira Ueoka
- Department of Cardiovascular Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan
| | - Saori Asada
- Department of Cardiovascular Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan
| | - Satoshi Kawada
- Department of Cardiovascular Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan
| | - Koji Nakagawa
- Department of Cardiovascular Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan
| | - Nobuhiro Nishii
- Department of Cardiovascular Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan; Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Perego M, Pariaut R, Moïse NS, Lombardo SF, Cavallini D, Santilli R. Electrocardiographic patterns of ventricular pre-excitation in dogs with right-sided accessory pathways. Vet Res Commun 2023; 47:1393-1403. [PMID: 36864330 DOI: 10.1007/s11259-023-10088-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 02/24/2023] [Indexed: 03/04/2023]
Abstract
INTRODUCTION The aim of the study was to describe the electrocardiographic features of ventricular pre-excitation (VPE) patterns characterized by the presence of delta (δ) wave, short P-δQRS interval, wide δQRS complexes in dogs with right-sided accessory pathways. ANIMALS, MATERIALS AND METHODS Twenty-six dogs with a confirmed accessory pathways (AP) via electrophysiological mapping were included. All dogs underwent a complete physical examination, 12-lead ECG, thoracic radiography, echocardiographic examination and electrophysiologic mapping. The AP were located in the following regions: right anterior, right posteroseptal, right posterior. The following parameters were determined: P-δQRS interval, δQRS duration, δQRS axis, δQRS morphology, δ-wave polarity, Q-wave, R-wave, R'-wave, S-wave amplitude, and R/S ratio. RESULTS In lead II, the median δQRS complex duration was 82.4 (IQR 7.2) and the median P-δQRS interval duration was 54.6 (IQR 4.2) msec. The median δQRS complex axis in the frontal plane was: + 68° (IQR 52.5) for right anterior APs, - 24 ° (IQR 24) for right postero-septal APs, - 43.5 ° (IQR 27.25) for right posterior APs (P = 0.007). In lead II, the polarity of the δ wave was positive in 5/5 right anterior APs and negative in 7/11 postero-septal APs and 8/10 in right posterior APs. In precordial leads of all dogs, R/S was ≤ 1 in V1 and > 1 in all leads from V2 to V6. CONCLUSION Surface electrocardiogram can be used to distinguish right anterior APs from right posterior and right postero-septal ahead of an invasive electrophysiological study.
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Affiliation(s)
- Manuela Perego
- Cardiovascular Division, Clinica Veterinaria Malpensa, Via Marconi 27, Samarate, Varese, 21017, Italy.
| | - Romain Pariaut
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - N Sydney Moïse
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Sergio Federico Lombardo
- Cardiovascular Division, Clinica Veterinaria Malpensa, Via Marconi 27, Samarate, Varese, 21017, Italy
| | - Damiano Cavallini
- Dipartimento di Scienze Mediche Veterinarie, Università di Bologna, Ozzano dell'Emilia, BO, 40064, Italy
| | - Roberto Santilli
- Cardiovascular Division, Clinica Veterinaria Malpensa, Via Marconi 27, Samarate, Varese, 21017, Italy
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
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Samesima N, God EG, Kruse JCL, Leal MG, Pinho C, França FFDAC, Pimenta J, Cardoso AF, Paixão A, Fonseca A, Pérez-Riera AR, Ribeiro ALP, Madaloso BA, Luna Filho B, Oliveira CARD, Grupi CJ, Moreira DAR, Kaiser E, Paixão GMDM, Feitosa Filho G, Pereira Filho HG, Grindler J, Aziz JL, Molina MS, Facin M, Tobias NMMDO, Oliveira PAD, Sanches PCR, Teixeira RA, Atanes SM, Pastore CA. Brazilian Society of Cardiology Guidelines on the Analysis and Issuance of Electrocardiographic Reports - 2022. Arq Bras Cardiol 2022; 119:638-680. [PMID: 36287420 PMCID: PMC9563889 DOI: 10.36660/abc.20220623] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Nelson Samesima
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | | | | | - Claudio Pinho
- Pontifícia Universidade Católida (PUC), Campinas , SP - Brasil
- Clínica Pinho , Valinhos , SP - Brasil
| | | | - João Pimenta
- Hospital do Servidor Público Estadual , São Paulo , SP - Brasil
| | - Acácio Fernandes Cardoso
- Serviço de Eletrocardiologia do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - Adail Paixão
- Hospital Unimec , Vitória Da Conquista , BA - Brasil
| | - Alfredo Fonseca
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | | | - Bruna Affonso Madaloso
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - Bráulio Luna Filho
- Hospital São Paulo , Universidade Federal de São Paulo (UNIFESP), São Paulo , SP - Brasil
| | | | - César José Grupi
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | - Elisabeth Kaiser
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | | | - Horacio Gomes Pereira Filho
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - José Grindler
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - José Luiz Aziz
- Faculdade de Medicina do ABC , Santo André , SP - Brasil
| | | | - Mirella Facin
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - Nancy M M de Oliveira Tobias
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | - Patricia Alves de Oliveira
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
| | | | - Ricardo Alkmin Teixeira
- Hospital Renascentista , Pouso Alegre , MG - Brasil
- Faculdade de Medicina da Universidade do Vale do Sapucaí (UNIVÁS), Pouso Alegre , MG - Brasil
| | | | - Carlos Alberto Pastore
- Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo , SP - Brasil
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Barcos JC, Humphreys JD, Tello Santacruz IA, Guzman JP, Fernández Recalde ML, Avaca HA, Cáceres Monié CR. Enhancing electrocardiographic analysis by combining a high-resolution 12-lead ECG with novel software tools. J Electrocardiol 2021; 70:70-74. [PMID: 34929607 DOI: 10.1016/j.jelectrocard.2021.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 11/24/2021] [Accepted: 12/03/2021] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Signal-averaged electrocardiography is a non-invasive, computerized technique that amplifies, filters, and averages cardiac electrical signals reducing contaminating noise to obtain a high-resolution record. The most widely used signal averaging (SA) method involves a bipolar X, Y, and Z orthogonal lead system. Information is limited regarding its application in the standard resting 12-lead ECG. A novel system combining a high-resolution 12-lead ECG (HR-ECG) registered by SA with advanced analysis tools is presented. HISTORY Original programming of a commercially available signal-averaged HR-ECG device was modified, introducing more exhaustive electrocardiographic assessment instruments. DESCRIPTION Using SA techniques and placing surface electrodes in the standard 12-lead ECG positions, a HR-ECG is acquired within a bandwidth of 0.25 to 262 Hz at a rate of 1000 samples per second. It is advisable to average at least 200 cycles, taking three to five minutes to record. The package includes different optional high-frequency filters, manual calipers, zoom/superimposing/amplification functions. CLINICAL ROLE The main strength lies in obtaining a low noise HR-ECG with zooming capabilities without definition loss. Other potential advantages are the greater ease in performing high precision analysis and comparing different ECG leads simultaneously. CURRENT PROBLEMS The primary limitation is the inability to document intermittent or dynamic electrocardiographic disorders because of averaging similar electrical cardiac cycles. FUTURE DEVELOPMENTS Adding artificial intelligence and further refinements in the averaging process could lead to software upgrades. CONCLUSION Integrating HR-ECG, obtained through SA techniques, with novel advanced analysis tools can enhance the ability to detect electrocardiographic disorders of permanent expression expeditiously.
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Affiliation(s)
- Javier C Barcos
- Department of Cardiology, Hospital Británico de Buenos Aires, Argentina.
| | - Juan D Humphreys
- Department of Cardiology, Hospital Británico de Buenos Aires, Argentina
| | | | - Juan P Guzman
- Department of Cardiology, Hospital Británico de Buenos Aires, Argentina
| | | | - Horacio A Avaca
- Department of Cardiology, Hospital Británico de Buenos Aires, Argentina
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