Reza Rahmani, Zahra Gholami, Kimia Ghanavati, Aryan Ayati, Akbar Shafiee
BACKGROUND: 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. METHODS: This cross-sectional study included patients with acute inferior MI who presented to Imam Khomeini Hospital and Tehran Heart Center and underwent primary PCI within 12 h of the onset of symptoms...
February 23, 2024: Journal of Electrocardiology
Johan Malmqvist, Johan Engdahl, Gunnar Sjölund, Piotr Doliwa
AIMS: To validate the sensitivity and specificity of the Zenicor One handheld ECG device for detection of atrial fibrillation in an outpatient clinical setting. METHODS AND RESULTS: Patients attending outpatient clinics at Danderyd Hospital (n = 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 were dichotomously categorized as "atrial fibrillation" or "not atrial fibrillation" by two senior cardiologists...
February 22, 2024: Journal of Electrocardiology
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
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 the challenges in fulfilling existing diagnostic criteria. The study emphasizes the need for a more precise understanding of right ventricular conduction disorders and the importance of developing robust diagnostic criteria...
February 17, 2024: Journal of Electrocardiology
Émilie Bertrand, Maxime Caru, Audrey Harvey, Gregor Andelfinger, Caroline Laverdiere, Maja Krajinovic, Daniel Sinnett, Vincent Jacquemet, Daniel Curnier
INTRODUCTION: 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 and during exercise, and to assess the applicability of these methods across a variety of risk groups exposed to diverse chemotherapy dosages...
February 12, 2024: Journal of Electrocardiology
Anthony Demolder, Maxime Nauwynck, Michel De Pauw, Marc De Buyzere, Mattias Duytschaever, Frank Timmermans, Jan De Pooter
BACKGROUND: 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. OBJECTIVES: To assess a novel approach for estimating certainty of AI-ECG predictions. METHODS: Two convolutional neural networks (CNN) were developed to predict patient age and sex. Model 1 applied a 5 s sliding time-window, allowing multiple CNN predictions...
February 8, 2024: Journal of Electrocardiology
Munthir Mansour, Omar Alqaisi, Nitesh Gautam, Srikanth Vallurupalli
BACKGROUND AND AIMS: 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 more sensitive. Prior studies have demonstrated mixed results...
February 6, 2024: Journal of Electrocardiology
Zhiwen Wang, Wei Bao, Dongdong Cai, Min Hu, Xingchun Gao, Chengzong Li
BACKGROUND: 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. METHODS: 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%; n = 354) and a validation cohort (30%; n = 152)...
January 28, 2024: Journal of Electrocardiology
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 advantages together. For both convolution and involution layers, we use multiple, large size kernels for multi-scale representation learning...
January 28, 2024: Journal of Electrocardiology
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 depending on the interpreter's level of training and experience, which could make diagnosis more difficult...
January 28, 2024: Journal of Electrocardiology
I van der Schaaf, M Kloosterman, A P M Gorgels, P Loh, P M van Dam
BACKGROUND: 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. PURPOSE: To determine the changes in ventricular activity during acute ischemia with the use of CineECG, and relating this to changes in the ECG. METHODS: Continuous ECG's during percutaneous coronary intervention with prolonged balloon inflation from the STAFF III database were analyzed with CineECG at baseline and every 10 s throughout the first 150 s of balloon inflation...
January 27, 2024: Journal of Electrocardiology
Naoya Kataoka, Teruhiko Imamura
No abstract text is available yet for this article.
January 20, 2024: Journal of Electrocardiology
Xiaojie Liu, Muzhang Li, Jiaying Chen, Jintao Wu, Leiming Zhang, Juan Hu, Feifei Li, Xianwei Fan, Haitao Yang, Lijie Yan, Jingjing Liu
BACKGROUND: 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. METHODS: We performed a retrospective study of 210 patients with preserved LVEF (male, n = 116; female, n = 94; mean age, 44 ± 17 years)...
January 16, 2024: Journal of Electrocardiology
Luisa Ciuffo, Monica Tung, Jonathan W Dukes, Eric Vittinghoff, Joshua D Moss, Randall J Lee, Byron K Lee, Zian H Tseng, Vasanth Vedantham, Jeffrey E Olgin, Melvin M Scheinman, Henry Hsia, Vijay A Ramchandani, Edward P Gerstenfeld, Gregory M Marcus
BACKGROUND: 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 not yet been reported. METHODS: This was a secondary analysis of the HOLIDAY Trial...
January 14, 2024: Journal of Electrocardiology
Bruce D Nearing, Richard L Verrier
BACKGROUND: 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). OBJECTIVE: Because the MMA technique is inherently suitable for dynamic tracking of alternans levels, it was selected for development of artificial intelligence (AI)-enabled algorithms using convolutional neural networks (CNN) to achieve rapid, efficient, and accurate assessment of P-wave alternans (PWA), R-wave alternans (RWA), and TWA...
December 26, 2023: Journal of Electrocardiology
Ryan Geffin, Jeffrey Triska, Salim Najjar, Jeffrey Berman, MacKenzie Cruse, Yochai Birnbaum
BACKGROUND: Diagnosis of left circumflex artery (LCx) myocardial infarctions via 12‑lead electrocardiogram (ECG) has posed a challenge to healthcare professionals for many years. METHODS AND RESULTS: 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. After independent adjudication of cardiac biomarkers, coronary angiography, and electrocardiographic changes, a final patient population of 58 encounters with acute occlusion myocardial infarction (OMI) with a culprit LCx lesion was established...
December 26, 2023: Journal of Electrocardiology
Selçuk Adabag, Amy Gravely, Sharma Kattel, Melissa Buelt-Gebhardt, Anders Westanmo
INTRODUCTION: 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 mortality after adjustment for the Care Assessment Needs (CAN) score, which was validated to predict mortality nationwide at the Veterans Administration (VA) (c-index 0...
December 26, 2023: Journal of Electrocardiology
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 its performance to current state-of-the-art CIE. METHODS: An AI-powered system consisting of 6 deep neural networks (DNN) was trained on standard 12‑lead ECGs to detect 20 essential diagnostic patterns (grouped into 6 categories: rhythm, acute coronary syndrome (ACS), conduction abnormalities, ectopy, chamber enlargement and axis)...
December 23, 2023: Journal of Electrocardiology
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 edematous states, affecting the myocardium (i.e, ME) and the body volume conductor "enveloping" the heart. Also, animal and human experience has revealed low electrical resistance during mild/moderate HT rejection...
December 20, 2023: Journal of Electrocardiology
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 activity. We aim to compare the P-wave amplitude recorded in the S-ECG and the IC-ECG in different venous accesses, catheters, heart rhythms, and atrial dimensions...
December 19, 2023: Journal of Electrocardiology
Naoya Kataoka, Teruhiko Imamura
No abstract text is available yet for this article.
December 18, 2023: Journal of Electrocardiology
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