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Which indices of heart rate variability are the best predictors of mortality after acute myocardial infarction? Meta-analysis of observational studies J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-11 Oscar L. Rueda-Ochoa, Luisa F. Osorio-Romero, Lizeth Daniela Sanchez-Mendez
Cardiovascular disease is the first cause of death globally with myocardial infarction as the main event. Heart rate variability (HRV) has been associated with an increased risk of mortality post-myocardial infarction. However, which indices of heart rate variability are the best predictors for total and cardiac mortality post-myocardial infarction remains unclear. We performed a systematic review
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ST-segment elevations with bradycardia in inferior leads: Acute pulmonary embolism J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-11 Yan-Guang Mou MD, Tian Zhang MD, Yun-Tao Zhao MD
Electrocardiographic (ECG) abnormalities are seen in 70%–80% of patients with acute pulmonary embolism (PE). Rarely, acute PE presents with ST-segment elevation (STE) in leads II; III and aVF and V mimicking ST-segment elevation myocardial infarction (STEMI). Herein, we describe a case of acute PE presenting with STE in II; III and aVF and V
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Feasibility and validity of using deep learning to reconstruct 12-lead ECG from three‑lead signals J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-08 Liang-Hung Wang, Yu-Yi Zou, Chao-Xin Xie, Tao Yang, Patricia Angela R. Abu
In the field of mobile health, portable dynamic electrocardiogram (ECG) monitoring devices often have a limited number of lead electrodes due to considerations, such as portability and battery life. This situation leads to a contradiction between the demand for standard 12‑lead ECG information and the limited number of leads collected by portable devices. This study introduces a composite ECG vector
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Impact of ECG data format on the performance of machine learning models for the prediction of myocardial infarction J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-07 Ryan A.A. Bellfield Msc, Sandra Ortega-Martorell PhD, Gregory Y.H. Lip MD, David Oxborough PhD, Ivan Olier PhD
Background We aim to determine which electrocardiogram (ECG) data format is optimal for ML modelling, in the context of myocardial infarction prediction. We will also address the auxiliary objective of evaluating the viability of using digitised ECG signals for ML modelling. Methods Two ECG arrangements displaying 10s and 2.5 s of data for each lead were used. For each arrangement, conservative and
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Relationship between ultra-short heart rate variability and short-term mortality in hospitalized COVID-19 patients J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-07 Baoying Lin, Lingdan Jin, Lingjia Li, Jiaxing Ke, Jinxiu Lin
To assess the association between ultra-short heart rate variability (US-HRV) and short-term mortality in patients with COVID-19 and develop prognostic prediction models to identify high-risk patients as early as possible. A retrospective cohort study was performed on 488 patients diagnosed with COVID-19 and hospitalized in the First Affiliated Hospital of Fujian Medical University from December 2022
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Spotting myocardial ischemia on a smartwatch J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-05 Katren R. Tyler MD, David R. Anderson MD, Nora Goldschlager MD, Bryn E. Mumma MD MAS
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Investigation of clinical significance of ST-segment depression during paroxysmal supraventricular tachycardia J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-05 Yuanyuan Cao, Zhihong Wu, Zhenjiang Liu, Qiming Liu, Shenghua Zhou
There are great differences in ST-segment depression during PSVT episodes. The aim of this study is to investigate the clinical significance of ST segment depression during PSVT. The study enrolled 333 consecutive patients who were diagnosed with PSVT by electrophysiological test from Jan 1, 2021 to July 31, 2022. The range, magnitude and morphology of ST-segment depression were described. The correlation
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Electronic ventricular pacing at the end of the QRS complex: Is it abnormal? J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-05 Yochai Birnbaum MD, Mihail G. Chelu MD PhD
An 82-year-old man with ischemic cardiomyopathy, heart failure with reduced ejection fraction and Medtronic biventricular ICD presented with shortness of breath. His ECG is presented with shortness of breath. ECG shows atrial sensed, electronic ventricular pacing. At the end of each QRS complex there is another pacemaker stimulus. This represents typical case of cardiac contractility modulation therapy
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Potential impact of alcohol consumption on ventricular repolarization J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-01 Ichika Otaki, Naoya Kataoka MD, Teruhiko Imamura MD, Koichiro Kinugawa MD
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Letter to editor: Right fascicles: A call for empirical evidence J. Electrocardiol. (IF 1.3) Pub Date : 2024-03-01 José Nunes de Alencar Neto
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EPM algorithm: A stepwise approach to accessory pathway localization in ventricular pre-excitation J. Electrocardiol. (IF 1.3) Pub Date : 2024-02-28 José Nunes de Alencar Neto, Marcel Henrique Sakai, Rogério Gomes de Almeida Neto, Matheus Kiszka Scheffer, Gabriel Pinheiro Soares Alencar e Silva, Claudio Cirenza, Angelo Amato Vincenzo de Paola
Accurate estimation of accessory pathway (AP) localization in patients with ventricular pre-excitation or Wolff-Parkinson-White (WPW) syndrome remains a diagnostic challenge. Existing algorithms have contributed significantly to this area, but alternative algorithms can offer additional perspectives and approaches to AP localization. This study introduces and evaluates the diagnostic accuracy of the
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Effect of pacing site on P wave parameters: Within-patient comparison of right atrial appendage and Bachmann's bundle J. Electrocardiol. (IF 1.3) Pub Date : 2024-02-27 Natasha A. Vedage MD MSCE, Edmond M. Cronin MB BCh BAO FHRS
Conventional right atrial appendage pacing (RAAp) is associated with adverse clinical outcomes mediated in part by electromechanical atrial delays. Bachmann's bundle pacing (BBp) offers more physiologic atrial activation; however, detailed analysis of pacing site on paced P wave parameters is lacking. Intraprocedural electrocardiograms of 21 consecutive patients undergoing atrial lead implantation
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Diagnostic value of electrocardiographic indices in discriminating the culprit vessel based on the coronary dominancy in inferior acute myocardial infarction J. Electrocardiol. (IF 1.3) Pub Date : 2024-02-23 Reza Rahmani MD, Zahra Gholami MD, Kimia Ghanavati MD, Aryan Ayati MD MPH, Akbar Shafiee MD MSc
Identifying the culprit during inferior myocardial infarction (MI) is still challenging. We determined the diagnostic effect of electrocardiographic (ECG) indices in identifying the culprit vessel of acute MI and the impact of coronary artery dominance on it. This cross-sectional study included patients with acute inferior MI who presented to Imam Khomeini Hospital and Tehran Heart Center and underwent
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Sensitivity and specificity of handheld one lead ECG detecting atrial fibrillation in an outpatient clinic setting J. Electrocardiol. (IF 1.3) Pub Date : 2024-02-22 Johan Malmqvist, Johan Engdahl, Gunnar Sjölund, Piotr Doliwa
To validate the sensitivity and specificity of the Zenicor One handheld ECG device for detection of atrial fibrillation in an outpatient clinical setting. Patients attending outpatient clinics at Danderyd Hospital ( = 220) were examined with one lead handheld ECG immediately after standard care 12‑lead ECG recording. Twelve recordings were excluded (atrial flutter or pacing) or missing. The recordings
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Comprehensive analysis of right fascicular and right bundle branch blocks: A multi-center study J. Electrocardiol. (IF 1.3) Pub Date : 2024-02-17 Santiago Obregón-Rosas, Diego García-Almazán, Cinthia Sofía Flores-Pérez, María Teresa Sotelo-Lozano, Edmundo De Sandoval-Martínez, Fátima Cecilia Hernández-Alcaraz, Luis Armando López-Mota, Manuel Alejandro Martínez-Estrada, Aranza Sara Oroz-Domínguez, Ángel Antonio Montañez-Aguirre, Luis Eduardo Romero-García de Acevedo, Itzayana Acosta-Castro, Ricardo Pérez-Rubio Flores, José Juan Ortega-Cerda M
Electrocardiographic patterns of right bundle branch and fascicular blocks were comprehensively analyzed in a two-phase study. The research aimed to address the scarcity of literature and the absence of standardized diagnostic criteria for these conditions. It revealed a weak correlation between the cardiac axis and age and highlighted the high misdiagnosis rate of these blocks. Furthermore, it discussed
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QTc intervals at rest and during exercise assessed by group correction formulas in survivors of childhood acute lymphoblastic leukemia J. Electrocardiol. (IF 1.3) Pub Date : 2024-02-12 Émilie Bertrand, Maxime Caru, Audrey Harvey, Gregor Andelfinger, Caroline Laverdiere, Maja Krajinovic, Daniel Sinnett, Vincent Jacquemet, Daniel Curnier
Early signs of subclinical cardiac damage must be identified before they turn into clinical manifestations. Tailoring a formula is relevant for precise QTc evaluation in childhood acute lymphoblastic leukemia (ALL) survivors considering they are at risk of long-term cardiac problems. Therefore, we aim to develop group heart rate correction formulas for QT intervals in childhood ALL survivors at rest
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Prediction of certainty in artificial intelligence-enabled electrocardiography J. Electrocardiol. (IF 1.3) Pub Date : 2024-02-08 Anthony Demolder MD, Maxime Nauwynck MSBME, Michel De Pauw MD PhD, Marc De Buyzere MSc, Mattias Duytschaever MD PhD, Frank Timmermans MD PhD, Jan De Pooter MD PhD
The 12‑lead ECG provides an excellent substrate for artificial intelligence (AI) enabled prediction of various cardiovascular diseases. However, a measure of prediction certainty is lacking. To assess a novel approach for estimating certainty of AI-ECG predictions. Two convolutional neural networks (CNN) were developed to predict patient age and sex. Model 1 applied a 5 s sliding time-window, allowing
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Significance of abnormal stress electrocardiography with normal cardiac imaging during stress testing–a meta-analysis J. Electrocardiol. (IF 1.3) Pub Date : 2024-02-06 Munthir Mansour MD MS, Omar Alqaisi MD, Nitesh Gautam MD, Srikanth Vallurupalli MD
Diagnostic testing for coronary artery disease frequently involves functional stress testing where imaging is often coupled with electrocardiogram (ECG) analysis. While decision-making is straightforward when both functional testing and ECG are either positive or negative, interpretation is challenging and prognostic importance uncertain with positive ECG and negative imaging since imaging is considered
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Artificial intelligence-enhanced electrocardiography for accurate diagnosis and management of cardiovascular diseases J. Electrocardiol. (IF 1.3) Pub Date : 2024-01-28 Muhammad Ali Muzammil, Saman Javid, Azra Khan Afridi, Rupini Siddineni, Mariam Shahabi, Muhammad Haseeb, F.N.U. Fariha, Satesh Kumar, Sahil Zaveri, Abdulqadir J. Nashwan
Electrocardiography (ECG), improved by artificial intelligence (AI), has become a potential technique for the precise diagnosis and treatment of cardiovascular disorders. The conventional ECG is a frequently used, inexpensive, and easily accessible test that offers important information about the physiological and anatomical state of the heart. However, the ECG can be interpreted differently by humans
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CLINet: A novel deep learning network for ECG signal classification J. Electrocardiol. (IF 1.3) Pub Date : 2024-01-28 Ananya Mantravadi, Siddharth Saini, Sai Chandra Teja R., Sparsh Mittal, Shrimay Shah, Sri Devi R., Rekha Singhal
Machine learning is poised to revolutionize medicine with algorithms that spot cardiac arrhythmia. An automated diagnostic approach can boost the efficacy of diagnosing life-threatening arrhythmia disorders in routine medical procedures. In this paper, we propose a deep learning network CLINet for ECG signal classification. Our network uses convolution, LSTM and involution layers to bring their unique
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Construction of a predictive model for new-onset atrial fibrillation after acute myocardial infarction based on P-wave amplitude in lead V1 J. Electrocardiol. (IF 1.3) Pub Date : 2024-01-28 Zhiwen Wang, Wei Bao, Dongdong Cai, Min Hu, Xingchun Gao, Chengzong Li
In this study, we aimed to identify the risk factors for new-onset atrial fibrillation (NOAF) after postcoronary intervention in patients with acute myocardial infarction (AMI) and to establish a nomogram prediction model. The clinical data of 506 patients hospitalized for AMI from March 2020 to February 2023 were retrospectively collected, and the patients were randomized into a training cohort (70%;
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CineECG for visualization of changes in ventricular electrical activity during ischemia J. Electrocardiol. (IF 1.3) Pub Date : 2024-01-27 I. van der Schaaf MD, M. Kloosterman MSc, A.P.M. Gorgels MD PhD FESC, P. Loh MD PhD, P.M. van Dam PhD
CineECG offers a visual representation of the location and direction of the average ventricular electrical activity throughout a single cardiac cycle, based on the 12‑lead ECG. Currently, CineECG has not been used to visualize ventricular activation patterns during ischemia. To determine the changes in ventricular activity during acute ischemia with the use of CineECG, and relating this to changes
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How to assess prognostic impact of QT prolongation J. Electrocardiol. (IF 1.3) Pub Date : 2024-01-20 Naoya Kataoka MD, Teruhiko Imamura MD
Abstract not available
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Association between left bundle branch block and ventricular septal mid-wall fibrosis in patients with preserved left ventricular ejection fraction J. Electrocardiol. (IF 1.3) Pub Date : 2024-01-16 Xiaojie Liu MM, Muzhang Li MM, Jiaying Chen MM, Jintao Wu MD, Leiming Zhang MM, Juan Hu MD, Feifei Li MM, Xianwei Fan MM, Haitao Yang MD, Lijie Yan MD, Jingjing Liu MM
The left bundle branch block (LBBB) is associated with ventricular septal mid-wall fibrosis (SMF) in patients with dilated cardiomyopathy (DCM). However, whether LBBB is also associated with SMF in patients with preserved left ventricular ejection fraction (LVEF) remains unclear. We performed a retrospective study of 210 patients with preserved LVEF (male, = 116; female, = 94; mean age, 44 ± 17 years)
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Acute alcohol exposure and electrocardiographic changes: Finding from the HOLIDAY trial J. Electrocardiol. (IF 1.3) Pub Date : 2024-01-14 Luisa Ciuffo MD, Monica Tung MD, Jonathan W. Dukes MD, Eric Vittinghoff PHD, Joshua D. Moss MD, Randall J. Lee MD PHD, Byron K. Lee MD, Zian H. Tseng MD MAS PHD, Vasanth Vedantham MD PHD, Jeffrey E. Olgin MD, Melvin M. Scheinman MD, Henry Hsia MD, Vijay A. Ramchandani PHD, Edward P. Gerstenfeld MD, Gregory M. Marcus MD MAS
Alcohol consumption is associated with a higher increased risk of atrial fibrillation (AF), but the acute effects on cardiac electrophysiology in humans remain poorly understood. The HOw ALcohol InDuces Atrial TachYarrhythmias (HOLIDAY) Trial revealed that alcohol shortened pulmonary vein atrial effective refractory periods, but more global electrophysiologic changes gleaned from the surface ECG have
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Novel application of convolutional neural networks for artificial intelligence-enabled modified moving average analysis of P-, R-, and T-wave alternans for detection of risk for atrial and ventricular arrhythmias J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-26 Bruce D. Nearing Ph.D., Richard L. Verrier Ph.D. F.H.R.S
T-wave alternans (TWA) analysis was shown in >14,000 individuals studied worldwide over the past two decades to be a useful tool to assess risk for cardiovascular mortality and sudden arrhythmic death. TWA analysis by the modified moving average (MMA) method is FDA-cleared and CMS-reimbursed (CAG-00293R2). Because the MMA technique is inherently suitable for dynamic tracking of alternans levels, it
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Why do we keep missing left circumflex artery myocardial infarctions? J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-26 Ryan Geffin, Jeffrey Triska, Salim Najjar, Jeffrey Berman, MacKenzie Cruse, Yochai Birnbaum
Diagnosis of left circumflex artery (LCx) myocardial infarctions via 12‑lead electrocardiogram (ECG) has posed a challenge to healthcare professionals for many years. A retrospective observational study was performed to analyze patients admitted with myocardial infarction. The study used electronic medical records and specific ICD-10 codes to identify eligible patients, resulting in 2032 encounters
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QT prolongation predicts all-cause mortality above and beyond a validated risk score J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-26 Selçuk Adabag MD MS, Amy Gravely MA, Sharma Kattel MD PhD, Melissa Buelt-Gebhardt PhD, Anders Westanmo PharmD
QT prolongation is a risk factor for life-threatening arrhythmias and sudden cardiac death. In large cohorts, QT interval was associated with all-cause mortality, but these analyses may contain residual confounding. Whether the QT interval provides prognostic information above and beyond a validated mortality risk score is unknown. We hypothesized that QT interval on ECG will independently predict
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Validation of an automated artificial intelligence system for 12‑lead ECG interpretation J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-23 Robert Herman, Anthony Demolder, Boris Vavrik, Michal Martonak, Vladimir Boza, Viera Kresnakova, Andrej Iring, Timotej Palus, Jakub Bahyl, Olivier Nelis, Monika Beles, Davide Fabbricatore, Leor Perl, Jozef Bartunek, Robert Hatala
Background The electrocardiogram (ECG) is one of the most accessible and comprehensive diagnostic tools used to assess cardiac patients at the first point of contact. Despite advances in computerized interpretation of the electrocardiogram (CIE), its accuracy remains inferior to physicians. This study evaluated the diagnostic performance of an artificial intelligence (AI)-powered ECG system and compared
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Serial electrocardiograms at follow-up for early detection of transplanted heart rejection: A viewpoint J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-20 John E. Madias
This viewpoint proposed that serial electrocardiograms (ECG) could be used to monitor for heart transplantation (HT) rejection, based on the expected attenuation of the amplitude of ECG QRS complexes (attQRS) engendered by the rejection-induced decrease in electrical resistance due to the underlying myocardial edema (ME). Previous work in humans has shown attQRS in the setting of a diverse array of
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Usefulness of the intracardiac electrocardiogram recorded using central venous catheters on P-wave magnification J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-19 Edgar Antezana-Chavez, Alonso Papantoniou, Karen Waisten, Gabriela Rodriguez, Claudio Hadid, Dario Di Toro, Leonardo Celano, Carlos Lopez, Carlos Labadet, Juan Gagliardi
Background The detection of atrial electrical activity is extremely valuable in recognizing complex cardiac arrhythmias. However, P-wave detection on a surface electrocardiogram (S-ECG) can sometimes be challenging. The intracardiac electrocardiogram (IC-ECG), recorded by a central venous catheter loaded with saline solution, has proven to be a safe and effective method for amplifying atrial electrical
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Clinical implication to predict pharmacologically induced type 1 Brugada pattern J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-18 Naoya Kataoka, Teruhiko Imamura
Abstract not available
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Applicability of heart rate variability for cardiac autonomic assessment in long-term COVID patients: A systematic review J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-12 Ádrya Aryelle Ferreira, Raphael Martins de Abreu, Rodrigo Souza Teixeira, Herculano Ribeiro da Silva Neto, Pedro Igor Lustosa Roriz, Matheus Sobral Silveira, Fabianne Maisa de Novaes Assis Dantas, Armele Dornelas De Andrade, Paulo Adriano Schwingel, Victor Ribeiro Neves
Purpose: To carry out a systematic review to determine the main methods used to study the heart rate variability (HRV) in individuals after the acute phase of COVID-19. Methods: The study followed the Preferred Items for Reporting for Systematic Reviews and Meta-Analyses (PRISMA) statement. PubMed, Web of Science, Scopus and CINAHAL electronic databases were searched from the inception to November
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Complete atrioventricular block following internal electrical cardioversion during atrial fibrillation ablation J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-15 Takashi Nakashima, Mikihito Morimoto, Masaru Nagase, Taro Shibahara, Daiju Ono, Takehiro Yamada, Gen Tanabe, Keita Suzuki, Makoto Yamaura, Takahisa Ido, Shigekiyo Takahashi, Hiroyuki Okura, Takuma Aoyama
Background Complete atrioventricular block (C-AVB) following internal electrical cardioversion (IEC) during atrial fibrillation (AF) ablation has not been fully investigated. We aimed to determine the prevalence and predictors of C-AVB following IEC during AF ablation. Methods C-AVB (non-conducted sinus impulse after IEC) and ventricular pause (VP) (the interval between IEC and the QRS complex) following
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P-wave characteristics as electrocardiographic markers of atrial abnormality in prediction of incident atrial fibrillation – The Malmö Preventive Project J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-14 Maria A. Baturova, Gustav Cornefjord, Jonas Carlson, Linda S.B. Johnson, J. Gustav Smith, Pyotr G. Platonov
Background P-wave indices reflect atrial abnormalities contributing to atrial fibrillation (AF). We aimed to assess a comprehensive set of P-wave characteristics for prediction of incident AF in a population-based setting. Methods Malmö Preventative Project (MPP) participants were reexamined in 2002–2006 with electrocardiographic (ECG) and echocardiographic examinations and followed for 5 years. AF-free
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Exploring vectorcardiography: An extensive vectocardiogram analysis across age, sex, BMI, and cardiac conditions J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-13 Fernando De la Garza Salazar, Brian Egenriether
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Personalized ECG monitoring and adaptive machine learning J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-13 Vladimir Shusterman, Barry London
This non-technical review introduces key concepts in personalized ECG monitoring (pECG), which aims to optimize the detection of clinical events and their warning signs as well as the selection of alarm thresholds. We review several pECG methods, including anomaly detection and adaptive machine learning (ML), in which learning is performed sequentially as new data are collected. We describe a distributed-network
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Atypical Wenckebach without grouped beating due to dual AV nodal conduction J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-06 John M. Cunningham, Ann Mackey, Charles Tharp
A 31-year-old woman reported dizziness in the early postpartum period after receiving dexmedetomidine. The ECG was misinterpreted as complete heart block; however, more careful analysis revealed an atypical Wenckebach pattern with dual AV nodal conduction and termination of nonconducted P waves with junctional escape beats. The patient's rhythm returned to sinus after stopping dexmedetomidine. Atypical
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An unusual presentation of low QRS voltage in a patient with aortic aneurysm J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-06 Eduardo Faria Soares de Magalhães, Alfredo José da Fonseca, Nicole Turin Jensen, Amanda Maria Rodrigues Fialho Moreira, Acácio Fernandes Cardoso
There are many causes of low QRS voltage on the electrocardiogram (ECG). Although uncommon, there is evidence that an enlarged aorta can cause diminished QRS amplitude on ECG. In this case report, we describe an unusual presentation of low QRS voltage confined to the first three precordial leads (V1-V3) in a 77-year-old female with ascending aortic aneurysm. Analysis of the patient's medical history
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Paradoxical interatrial conduction recovery after cavotricuspid isthmus ablation: A case report J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-28 Martín Negreira-Caamaño, Ez Alddin Rajjoub, Rafael Salguero-Bodes, Fernando Arribas-Ynsaurriaga, Daniel Rodríguez-Muñoz
We present a case of a patient with advanced interatrial block who was admitted for cavotricuspid isthmus ablation as treatment of typical atrial flutter. A baseline advanced interatrial block pattern turned into partial interatrial block pattern and prolonged PR interval after the procedure. We discuss the mechanism underlying that change.
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Case of a misleading ECG J. Electrocardiol. (IF 1.3) Pub Date : 2023-12-02 Ahmed Shahab, Uzair A. Mahmood, Amit Noheria
An elderly man with severe chronic obstructive pulmonary disease and a history of complete heart block with pacemaker placement was found to have pacemaker lead infection and required device extraction. He had a standard dual chamber pacemaker in place, however the ECG obtained showed paced QRS complexes with presence of R wave in lead V1 and QS in lead I suggestive of left ventricular pacing. Additional
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Association between excess catecholamine synthesis and polymorphic premature ventricular contraction J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-26 Burak Cesur, Deniz Elcik, Zeki Cetinkaya, Saban Kelesoglu, Ugur Karabiyik, Mehmet Tugrul Inanc, Nihat Kalay, Ali Ergin, Ramazan Topsakal
Background The reasons for the etiology of premature ventricular contractions (PVCs) are not specifically known. Many patients are resistant to medical treatment, and a factor that would predict response to medical treatment cannot be identified. This study aims to investigate if a high catecholamine level results in polymorphic PVC. Methods This study was obtained by prospective data registry analysis
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The electrocardiographic manifestations of pectus excavatum before and after surgical correction J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-19 Juan M. Farina, Thanaboon Yinadsawaphan, Dawn E. Jaroszewski, Mohamed R. Aly, Michael Botros, Kamal P. Cheema, Olubadewa A. Fatunde, Dan Sorajja
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Periodic repolarization dynamics: Different methods for quantifying low-frequency oscillations of repolarization J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-19 Lauren E. Sams, Maximilian Wörndl, Leonie Bachinger, Laura E. Villegas Sierra, Konstantinos Mourouzis, Dominik Naumann, Luisa Freyer, Konstantinos D. Rizas
Background Periodic repolarization dynamics (PRD) is an electrocardiographic biomarker that quantifies low-frequency (LF) instabilities of repolarization. PRD is a strong predictor of mortality in patients with ischaemic and non-ischaemic cardiomyopathy. Until recently, two methods for calculating PRD have been proposed. The wavelet analysis has been widely tested and quantifies PRD in deg2 units by
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ECG patterns to predict pulmonary arterial hypertension in patients with severe tricuspid regurgitation J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-22 Marcin Waligóra, Maria Smorąg, Natalia Bukała, Marianna Zygmunt, Natalia Kachnic, Emilia Lis, Klaudia Zaczyńska, Łukasz Wilczek, Barbara Wziątek, Grzegorz Kopeć
Introduction Echocardiographic evaluation of tricuspid regurgitation (TR) velocity is a key measure in screening for pulmonary hypertension. Based on its value and additional features of right ventricle overload patients are classified into low, intermediate or high probability of pulmonary hypertension which transfers into decisions of further invasive evaluation. However, in the presence of severe
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Acute coronary syndrome with single‑lead ST segment elevation: A rare presentation of multivessel coronary artery disease J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-21 Giovanni Goffredo, Michele Correale, Davide Manfredi, Giuseppe La Cecilia, Antonio Ruggiero, Riccardo Ieva, Natale Daniele Brunetti
We report the case of a 73-year-old male admitted for epigastric pain and syncope with increased troponin level and a rare electrocardiogram (a single‑lead ST-elevation). Coronary angiography showed multi-vessel coronary artery disease. The patient underwent coronary angioplasty with drug-eluting stenting on left anterior descending coronary artery and drug eluting ballooning on first diagonal ostium
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Prior electrocardiograms not useful for machine learning predictions of major adverse cardiac events in emergency department chest pain patients J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-20 Axel Nyström, Pontus Olsson de Capretz, Anders Björkelund, Jakob Lundager Forberg, Mattias Ohlsson, Jonas Björk, Ulf Ekelund
At the emergency department (ED), it is important to quickly and accurately determine which patients are likely to have a major adverse cardiac event (MACE). Machine learning (ML) models can be used to aid physicians in detecting MACE, and improving the performance of such models is an active area of research. In this study, we sought to determine if ML models can be improved by including a prior electrocardiogram
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Electrocardiographic Z-axis QRS-T voltage-time-integral in patients with typical right bundle branch block – Correlation with echocardiographic right ventricular size and function J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-19 Tyan Fairbank, Ashley DeBauge, Christopher J. Harvey, Sania Jiwani, Sagar Ranka, Timothy A. Beaver, Seth H. Sheldon, Madhu Reddy, Amit Noheria
Background Right bundle branch block (RBBB) can be benign or associated with right ventricular (RV) functional and structural abnormalities. Our aim was to evaluate QRS-T voltage-time-integral (VTI) compared to QRS duration and lead V1 R' as markers for RV abnormalities. Methods We included adults with an ECG demonstrating RBBB and echocardiogram obtained within 3 months of each other, between 2010
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Electrocardiographic left atrial abnormality and risk of heart failure J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-19 Sunnie Li, Muhammad Imtiaz Ahmad, Yabing Li, Elsayed Z. Soliman
Introduction The association and the racial differences of the electrocardiographic markers of left atrial abnormality (ECG-LAA) with heart failure (HF) are unclear. Methods We examined the cross-sectional association of ECG-LAA, defined as deep terminal negativity of P wave in V1 (DTNPV1) with HF in 8460 participants (51.5% women, 60.3 ± 13.5 age and 49.8% Whites) from the US Third National Health
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Designing an ECG curriculum for residents: Evidence-based approaches to improving resident ECG interpretation skills J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-16 Matthew G. Kaye, Alysia V. Kwiatkowski, Hassan A. Khan, Yan Yastynovich, Susan P. Graham, Jennifer Meka
Residents enter their training with variable comfort and competency in electrocardiogram (ECG) interpretation. Accurately interpreting an ECG is a fundamental skill in medicine and resident physicians would benefit from a longitudinal, dedicated ECG curriculum as part of their training to enhance interpretation skills and improve patient outcomes. Educators currently employ a wide array of methodologies
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Modeling ventricular repolarization gradients in normal cases using the equivalent dipole layer J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-14 M. Kloosterman, M.J. Boonstra, I. van der Schaaf, P. Loh, P.M. van Dam
Background Electrical activity underlying the T-wave is less well understood than the QRS-complex. This study investigated the relationship between normal T-wave morphology and the underlying ventricular repolarization gradients using the equivalent dipole layer (EDL). Methods Body-surface-potential-maps (BSPM, 67‑leads) were obtained in nine normal cases. Subject specific MRI-based anatomical heart/torso-models
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Vagal dysautonomia in patients with Chagas disease and mortality: 14-year results of a population cohort of the elderly J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-14 Diego N. Moraes, Bruno R. Nascimento, Maria Fernanda Lima-Costa, Carla Paula M. Soares, Antonio Luiz P. Ribeiro
Introduction Great part of Chagas disease (ChD) mortality occurs due to ventricular arrhythmias, and autonomic function (AF) may predict unfavorable outcomes. We aimed to evaluate the predictive value of AF indexes in ChD patients. Methods The Bambuí Study of Aging is a prospective cohort of residents ≥60 years at study onset (1997), in the southeastern Brazilian city of Bambuí (15,000 inhabitants)
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Context-independent identification of myocardial ischemia in the prehospital ECG of chest pain patients J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-07 Cees A. Swenne, C. Cato ter Haar
Non-traumatic chest pain is a frequent reason for an urgent ambulance visit of a patient by the emergency medical services (EMS). Chest pain (or chest pain-equivalent symptoms) can be innocent, but it can also signal an acute form of severe pathology that may require prompt intervention. One of these pathologies is cardiac ischemia, resulting from a disbalance between blood supply and demand. One cause
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Feasibility of His bundle pacing facilitated by EASI derived 12‑lead ECG J. Electrocardiol. (IF 1.3) Pub Date : 2023-10-31 Alexander Langanke, Klaus Andreas
Introduction His bundle pacing (HBP) has become popular in recent years as a more physiological alternative to conventional right ventricular pacing. Implantation requires 12‑lead ECG during surgery, which is not readily available in a standard operating room. Often but not always HBP is performed in an electrophysiology lab. EASI is a reduced lead system which enables derived 12‑lead ECG. EASI derived
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A Bayesian approach to acute coronary occlusion J. Electrocardiol. (IF 1.3) Pub Date : 2023-11-02 Jesse T.T. McLaren, Stephen W. Smith
In the STEMI paradigm, the disease (acute coronary occlusion) is defined and named after one element (ST elevation, without regard to the remainder of the QRST) of one imperfect test (the ECG). This leads to delayed reperfusion for patients with acute coronary occlusion whose ECGs don't meet STEMI criteria. In this editorial, we elaborate on the article by Jose Nunes de Alencar Neto about applying
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A case of Brugada phenocopy alteration induced by immune checkpoint inhibitors J. Electrocardiol. (IF 1.3) Pub Date : 2023-10-19 Jianming Zhang, Huayong Jin
Immunotherapy has shown remarkable efficacy in various cancer treatments. However, enhanced T-cell immune surveillance can lead to aberrant immune responses, resulting in severe immune checkpoint inhibitor-related adverse events. This is a case report of a patient previously treated with immune checkpoint inhibitors who presented with ST-segment elevation without abnormal troponin and cardiac enzyme
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Applying Bayesian reasoning to electrocardiogram interpretation J. Electrocardiol. (IF 1.3) Pub Date : 2023-10-17 José Nunes de Alencar Neto
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Left bundle branch pacing in alternating bundle branch block J. Electrocardiol. (IF 1.3) Pub Date : 2023-10-16 Juan Benezet-Mazuecos, Adrian Baranchuck, Álvaro Lozano, Julián Crosa, Ángel Miracle
We present a case of symptomatic intermittent AV block showing during monitorization alternating bundle branch block. Presuming a high need of pacing, conduction system pacing was considered a more physiological alternative in this patient. Left bundle branch pacing restored a stable atrioventricular synchrony with a paced QRS complex similar to the native one and might be a good alternative in these
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Action potential morphology affects T-wave symmetry (simulation study) J. Electrocardiol. (IF 1.3) Pub Date : 2023-10-12 Natalia V. Arteyeva, Ilia A. Komarov, Jan E. Azarov
Background Assessing T-wave symmetry in addition to QT subintervals measurements can provide novel independent data about ventricular repolarization abnormalities linked with arrhythmogenesis. However, the causes of the changes of T-wave symmetry are not completely understood. In silico studies showed that the more symmetrical T-waves were associated with shorter action potential duration (APD) and