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JOURNAL ARTICLE
Mario J Mc Loughlin, José M Di Diego
BACKGROUND: Precordial Bipolar Leads (PBLs) provide new electrocardiographic information derived from standard 12‑lead ECG recordings. OBJECTIVES: To explore the usefulness of PBLs in patients with acute circumflex coronary artery (CxCA) occlusion. METHODS: Twelve patients undergoing elective percutaneous transluminal coronary angioplasty (PTCA) were studied before and after acute CxCA occlusion and their data were processed with new methods based on PBLs...
March 28, 2024: Journal of Electrocardiology
#2
JOURNAL ARTICLE
Amit Noheria, Christian Toquica, Uzair A Mahmood, Ashley DeBauge, Tucker Morey, Christopher J Harvey
3DQRSarea is a strong marker for cardiac resynchronization therapy and can be obtained by taking the (i) summation or the (ii) difference of the areas subtended by positive and negative deflections in X, Y, Z vectorcardiographic electrocardiogram (ECG) leads. We correlated both methods with the instantaneous-absolute-3D-voltage-time-integral (VTIQRS-3D ). 3DQRSarea consistently underestimated the VTIQRS -3D , but the summation method was a closer and more reliable approximation. The dissimilarity was less apparent in left bundle branch block (r2 summation ...
March 26, 2024: Pacing and Clinical Electrophysiology: PACE
#3
JOURNAL ARTICLE
Biqi Tang, Sen Liu, Xujian Feng, Chunpu Li, Hongye Huo, Aiguo Wang, Xintao Deng, Cuiwei Yang
BACKGROUND: Atrial fibrillation (AF) is a progressive arrhythmia that significantly affects a patient's quality of life. The 4S-AF scheme is clinically recommended for AF management; however, the evaluation process is complex and time-consuming. This renders its promotion in primary medical institutions challenging. This retrospective study aimed to simplify the evaluation process and present an objective assessment model for AF gradation. METHODS: In total, 189 12-lead electrocardiogram (ECG) recordings from 64 patients were included in this study...
February 18, 2024: Computer Methods and Programs in Biomedicine
#4
REVIEW
Frederieke Eerenberg, Justin Luermans, Joost Lumens, Uyên Châu Nguyên, Kevin Vernooy, Antonius van Stipdonk
Vectorcardiographic QRS area is a promising tool for patient selection and implantation guidance in cardiac resynchronization therapy (CRT). Research has mainly focused on the role of QRS area in patient selection for CRT. Recently, QRS area has been proposed as a tool to guide left ventricular lead placement in CRT. Theoretically, vector-based electrical information of ventricular fusion pacing, calculated from the basic 12-lead ECG, can give real-time insight into the extent of resynchronization at any LV lead position, as well as any selected electrode on the LV lead...
January 11, 2024: Journal of Cardiovascular Development and Disease
#5
JOURNAL ARTICLE
Leonardo Paschoal Camacho Varoni, Nelson Samesima, Mirella Facin, Horácio Gomes Pereira Filho, Bruna Affonso Madaloso, Wilson Mathias Junior, Carlos Alberto Pastore
The aim was to characterize the electrovectorcardiographic pattern of ventricular aneurysms in ischemic cardiopathy by analyzing the cardiac ventricular repolarization. The medical records of 2,670 individuals were analyzed in this cross-sectional study. A test phase included 33 patients who underwent transthoracic echocardiogram with ultrasonic enhancing agent, electrocardiogram, and vectorcardiogram (aneurysm group - n = 22, and akinesia group - n = 11). In the validation phase, cardiac magnetic resonance imaging established the left ventricle segmental contractility in 16 patients who underwent electrocardiographic and vectorcardiographic tests (aneurysm group, n = 8, and akinesia group, n = 8)...
2023: Frontiers in Cardiovascular Medicine
#6
JOURNAL ARTICLE
Muhammet Dural, Mohammed A Ghossein, Willem Gerrits, Fenna Daniels, Mathias Meine, Alexander H Maass, Michiel Rienstra, Frits W Prinzen, Kevin Vernooy, Antonius M W van Stipdonk
AIMS: Data on repolarization parameters in cardiac resynchronization therapy (CRT) are scarce. We investigated the association of baseline T-wave area, with both clinical and echocardiographic outcomes of CRT in a large, multi-centre cohort of CRT recipients. Also, we evaluated the association between the baseline T-wave area and QRS area. METHODS AND RESULTS: In this retrospective study, 1355 consecutive CRT recipients were evaluated. Pre-implantation T-wave and QRS area were calculated from vectorcardiograms...
December 28, 2023: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
#7
JOURNAL ARTICLE
Hans Friedrich Stabenau, Jonathan W Waks
BACKGROUND AND OBJECTIVES: Electrocardiographic (ECG) and vectorcardiographic (VCG) analyses are used to diagnose current cardiovascular disease and for risk stratification for future adverse cardiovascular events. With increasing use of digital ECGs, research into novel ECG/VCG parameters has increased, but widespread computer-based ECG/VCG analysis is limited because there are no currently available, open-source, and easily customizable software packages designed for automated and reproducible analysis...
September 12, 2023: Computer Methods and Programs in Biomedicine
#8
JOURNAL ARTICLE
Hans F Stabenau, Arunashis Sau, Daniel B Kramer, Nicholas S Peters, Fu Siong Ng, Jonathan W Waks
INTRODUCTION: Measurement of the spatial ventricular gradient (SVG), spatial QRST angles, and other vectorcardiographic measures of myocardial electrical heterogeneity have emerged as novel risk stratification methods for sudden cardiac death and other adverse cardiovascular events. Prior studies of normal limits of these measurements included primarily young, healthy, White volunteers, but normal limits in older patients are unknown. The influence of race and body mass index (BMI) on these measurements is also unclear...
September 8, 2023: Journal of Cardiovascular Electrophysiology
#9
JOURNAL ARTICLE
Xiaoye Zhao, Yinlan Gong, Lihua Xu, Ling Xia, Jucheng Zhang, Dingchang Zheng, Zongbi Yao, Xinjie Zhang, Haicheng Wei, Jun Jiang, Haipeng Liu, Jiandong Mao
PURPOSE: Coronary microvascular dysfunction (CMD) is emerging as an important cause of myocardial ischemia, but there is a lack of a non-invasive method for reliable early detection of CMD. AIM: To develop an electrocardiogram (ECG)-based machine learning algorithm for CMD detection that will lay the groundwork for patient-specific non-invasive early detection of CMD. METHODS: Vectorcardiography (VCG) was calculated from each 10-second ECG of CMD patients and healthy controls...
June 5, 2023: Mathematical Biosciences and Engineering: MBE
#10
JOURNAL ARTICLE
Freddy L Bueno-Palomeque, Konstantinos A Mountris, Nuria Ortigosa, Raquel Bailon, Bart Bijnens, Fatima Crispi, Esther Pueyo, Ana Minchole, Pablo Laguna
Changes induced by intrauterine growth restriction (IUGR) in cardiovascular anatomy and function that persist throughout life have been associated with a higher predisposition to heart disease in adulthood. Together with cardiac morphological remodelling, evaluated through the ventricular sphericity index, alterations in cardiac electrical function have been reported by characterization of the depolarization and repolarization loops, and their angular relationship, measured from the vectorcardiogram. The underlying relationship between the morphological remodelling and the angular variation of QRS and T-wave dominant vectors, if any, has not been explored...
July 21, 2023: IEEE Journal of Biomedical and Health Informatics
#11
REVIEW
Mario Jorge Mc Loughlin, José M Di Diego
No abstract text is available yet for this article.
July 14, 2023: Journal of Electrocardiology
#12
JOURNAL ARTICLE
Mario J Mc Loughlin, José M Di Diego
BACKGROUND: Precordial Bipolar Leads (PBL) provide new electrocardiographic information derived from standard 12‑lead ECG recordings. OBJECTIVES: To explore the usefulness of PBL in patients with acute right coronary artery (RCA) occlusion. METHODS: Sixteen patients undergoing elective percutaneous transluminal coronary angioplasty (PTCA) were studied before and after RCA occlusion and their data were processed with new methods based on PBL...
2023: Journal of Electrocardiology
#13
JOURNAL ARTICLE
William J Young, Jeffrey Haessler, Jan-Walter Benjamins, Linda Repetto, Jie Yao, Aaron Isaacs, Andrew R Harper, Julia Ramirez, Sophie Garnier, Stefan van Duijvenboden, Antoine R Baldassari, Maria Pina Concas, ThuyVy Duong, Luisa Foco, Jonas L Isaksen, Hao Mei, Raymond Noordam, Casia Nursyifa, Anne Richmond, Meddly L Santolalla, Colleen M Sitlani, Negin Soroush, Sébastien Thériault, Stella Trompet, Stefanie Aeschbacher, Fariba Ahmadizar, Alvaro Alonso, Jennifer A Brody, Archie Campbell, Adolfo Correa, Dawood Darbar, Antonio De Luca, Jean-François Deleuze, Christina Ellervik, Christian Fuchsberger, Anuj Goel, Christopher Grace, Xiuqing Guo, Torben Hansen, Susan R Heckbert, Rebecca D Jackson, Jan A Kors, Maria Fernanda Lima-Costa, Allan Linneberg, Peter W Macfarlane, Alanna C Morrison, Pau Navarro, David J Porteous, Peter P Pramstaller, Alexander P Reiner, Lorenz Risch, Ulrich Schotten, Xia Shen, Gianfranco Sinagra, Elsayed Z Soliman, Monika Stoll, Eduardo Tarazona-Santos, Andrew Tinker, Katerina Trajanoska, Eric Villard, Helen R Warren, Eric A Whitsel, Kerri L Wiggins, Dan E Arking, Christy L Avery, David Conen, Giorgia Girotto, Niels Grarup, Caroline Hayward, J Wouter Jukema, Dennis O Mook-Kanamori, Morten Salling Olesen, Sandosh Padmanabhan, Bruce M Psaty, Cristian Pattaro, Antonio Luiz P Ribeiro, Jerome I Rotter, Bruno H Stricker, Pim van der Harst, Cornelia M van Duijn, Niek Verweij, James G Wilson, Michele Orini, Philippe Charron, Hugh Watkins, Charles Kooperberg, Henry J Lin, James F Wilson, Jørgen K Kanters, Nona Sotoodehnia, Borbala Mifsud, Pier D Lambiase, Larisa G Tereshchenko, Patricia B Munroe
The 3-dimensional spatial and 2-dimensional frontal QRS-T angles are measures derived from the vectorcardiogram. They are independent risk predictors for arrhythmia, but the underlying biology is unknown. Using multi-ancestry genome-wide association studies we identify 61 (58 previously unreported) loci for the spatial QRS-T angle (N = 118,780) and 11 for the frontal QRS-T angle (N = 159,715). Seven out of the 61 spatial QRS-T angle loci have not been reported for other electrocardiographic measures...
March 14, 2023: Nature Communications
#14
JOURNAL ARTICLE
Maroua Mehri, Guillaume Calmon, Freddy Odille, Julien Oster
Providing reliable detection of QRS complexes is key in automated analyses of electrocardiograms (ECG). Accurate and timely R-peak detections provide a basis for ECG-based diagnoses and to synchronize radiologic, electrophysiologic, or other medical devices. Compared with classical algorithms, deep learning (DL) architectures have demonstrated superior accuracy and high generalization capacity. Furthermore, they can be embedded on edge devices for real-time inference. 3D vectorcardiograms (VCG) provide a unifying framework for detecting R-peaks regardless of the acquisition strategy or number of ECG leads...
February 18, 2023: Sensors
#15
JOURNAL ARTICLE
Resi M Schoonderwoerd, Mariëlle Dik, Sumche Man, Arie C Maan, J Wouter Jukema, Cees A Swenne
Wilson assumed that the ventricular gradient (VG) is independent of the ventricular activation order. This paradigm has often been refuted and was never convincingly corroborated. We sought to validate Wilson's concept by intra-individual comparison of the VG of sinus beats and ectopic beats, thus assessing the effects of both altered ventricular conduction (caused by the ectopic focus) and restitution (caused by ectopic prematurity). We studied standard diagnostic ECGs of 118 patients with accidental extrasystoles: normally conducted supraventricular ectopic beats (SN, N = 6) and aberrantly conducted supraventricular ectopic beats (SA, N = 20) or ventricular ectopic beats (V, N = 92)...
February 20, 2023: Journal of Cardiovascular Development and Disease
#16
JOURNAL ARTICLE
Theekshana Dissanayake, Tharindu Fernando, Simon Denman, Sridha Sridharan, Clinton Fookes
Generative Adversarial Networks (GANs) are a revolutionary innovation in machine learning that enables the generation of artificial data. Artificial data synthesis is valuable especially in the medical field where it is difficult to collect and annotate real data due to privacy issues, limited access to experts, and cost. While adversarial training has led to significant breakthroughs in the computer vision field, biomedical research has not yet fully exploited the capabilities of generative models for data generation, and for more complex tasks such as biosignal modality transfer...
November 21, 2022: IEEE Journal of Biomedical and Health Informatics
#17
JOURNAL ARTICLE
E S Yurasova, E V Blinova, T A Sakhnova
The vector concept in the analysis of the electrical signals of the heart began to be used at the dawn of the development of electrocardiology. For several decades, vectorcardiography has developed in parallel with electrocardiography; reached its peak in the 60s, and after a period of cooling experienced a resurgence since the early 90s, when it became possible to mathematically synthesize vectorcardiograms (VCG) from digital electrocardiograms in 12 leads. VCG reflects the same phenomena as electrocardiography, but allows you to calculate and visualize a number of three-dimensional characteristics of the electrical signals of the heart...
October 24, 2022: Terapevticheskiĭ Arkhiv
#18
JOURNAL ARTICLE
T A Sakhnova, E V Blinova, E S Yurasova, T M Uskach, N V Blinova, E A Aidu, V G Trunov, M A Saidova
AIM: To explore the features of vectorcardiograms (VCG) of patients with essential hypertension complicated by chronic heart failure with reduced left ventricular ejection fraction (CHFrLVEF). MATERIALS AND METHODS: We analyzed VCGs of 70 hypertensive patients with CHFrLVEF and 275 hypertensive patients without clinical signs of CHF and with LVEF50%. We assessed the presence of rhythm and conduction disturbances, and the parameters of the synthesized VCG, i.e., module of the maximum QRS vector, planarity index of the spatial QRS loop (P/S), and spatial angle between the integral QRS and T vectors (sQRS-Ta)...
October 24, 2022: Terapevticheskiĭ Arkhiv
#19
JOURNAL ARTICLE
L Noben, C Lempersz, E R van den Heuvel, Z Zhan, F P H A Vandenbussche, A B C Coumans, M C Haak, R Vullings, S G Oei, S A B Clur, J O E H van Laar
OBJECTIVES: To determine if the electrical heart axis in different types of congenital heart defects (CHD) differs from that of a healthy cohort at mid-gestation. METHODS: Non-invasive fetal electrocardiography (NI-fECG) was performed in singleton pregnancies with suspected CHD between 16 and 30 weeks of gestation. The mean electrical heart axis (MEHA) was determined from the fetal vectorcardiogram after correction for fetal orientation. Descriptive statistics were used to determine the MEHA with corresponding 95% confidence intervals (CI) in the frontal plane of all fetuses with CHD and the following subgroups: conotruncal anomalies (CTA), atrioventricular septal defects (AVSD) and hypoplastic right heart syndrome (HRHS)...
2022: PloS One
#20
Hoang H Nguyen, Patrick Y Jay
Isolated congenital aneurysm of the muscular interventricular septum is rare. We present a patient with congenital aneurysm of the basal muscular ventricular septum, who also develops conduction abnormalities with first-degree heart block, right bundle branch block, and left posterior fascicular block. The case details the natural history of the aneurysm over a 10-year period follow-up during which the patient remained asymptomatic with evidence of regression of the aneurysm. Given the aneurysm's location close to the proximal right bundle and left posterior fascicle, we believe that the cause for the aneurysm also injured both fascicles resulting in bifascicular block...
October 2022: Curēus
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