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Journal of Electrocardiology

Teri M Kozik, Mary G Carey, Mouchumi Bhattacharyya, Walter Chien, George S Charos, Therese F Connolly, Mary C Hickman, Sherri Schmidt, Michele M Pelter
No abstract text is available yet for this article.
August 2, 2018: Journal of Electrocardiology
Robbert Zusterzeel, Jose Vicente, Roberto Ochoa-Jimenez, Jun Zhu, Jean-Philippe Couderc, Esther Akinnagbe-Zusterzeel, David G Strauss
The presence of left bundle branch block (LBBB) is an important predictor of benefit from cardiac resynchronization therapy (CRT). New "strict" electrocardiographic (ECG) criteria for LBBB have been shown to better predict benefit from CRT. The "strict" LBBB criteria include: QRS duration ≥140 ms (men) or ≥130 ms (women), QS- or rS-configurations of the QRS complex in leads V1 and V2, and mid-QRS notching or slurring in ≥2 of leads V1, V2, V5, V6, I and aVL. The "strict" LBBB criteria are not regularly used and most hospital automated ECG systems and physicians still use more conventional LBBB criteria...
August 1, 2018: Journal of Electrocardiology
Ran Xiao, Yuan Xu, Michele M Pelter, Richard Fidler, Fabio Badilini, David W Mortara, Xiao Hu
No abstract text is available yet for this article.
August 1, 2018: Journal of Electrocardiology
Fabio Badilini, Brian Young, Barry Brown, Martino Vaglio
Digital ECG is today a common practice but a universal format for its storage and exchange has never been widely implemented. The reason is linked on one side to the need of the manufacturing industry to (rightly) protect intellectual propriety and technology, but on the other to an inadequate effort of the research community to sufficiently enforce the use of digital ECG data. To some degree, and at least from a practical point of view, the problem is also linked to other factors, such as the need in some instances to protect patient-sensitive information, and whether digital exchanged data should also include annotations and measurements from an algorithm or by human intervention...
July 30, 2018: Journal of Electrocardiology
Marilyn Hravnak, Tiffany Pellathy, Lujie Chen, Artur Dubrawski, Anthony Wertz, Gilles Clermont, Michael R Pinsky
Research demonstrates that the majority of alarms derived from continuous bedside monitoring devices are non-actionable. This avalanche of unreliable alerts causes clinicians to experience sensory overload when attempting to sort real from false alarms, causing desensitization and alarm fatigue, which in turn leads to adverse events when true instability is neither recognized nor attended to despite the alarm. The scope of the problem of alarm fatigue is broad, and its contributing mechanisms are numerous. Current and future approaches to defining and reacting to actionable and non-actionable alarms are being developed and investigated, but challenges in impacting alarm modalities, sensitivity and specificity, and clinical activity in order to reduce alarm fatigue and adverse events remain...
July 29, 2018: Journal of Electrocardiology
Brian Young, Johann-Jakob Schmid
The current set of IEC particular standards that pertain to electrocardiograph (ECG) devices, namely, 60601-2-25, 60601-2-27, and 60601-2-47, which define requirements and testing for the essential performance and basic safety of diagnostic ECG, ECG monitoring and ambulatory ECG systems, respectively. These standards have been harmonized with the corresponding AAMI standards, namely EC11, EC13 and EC38. Together these standards have been in existence for decades and have evolved separately even though the technology used in these three clinical applications is very similar...
July 17, 2018: Journal of Electrocardiology
Elien B Engels, Annemijn Vis, Bianca D van Rees, Lina Marcantoni, Francesco Zanon, Kevin Vernooy, Frits W Prinzen
BACKGROUND: The recently developed quadripolar left ventricular (LV) leads have been developed to increase the benefit of cardiac resynchronization therapy (CRT). These leads offer the option to stimulate the LV on multiple sites (multipoint pacing, MPP). Invasive haemodynamic measurements have shown that MPP increases haemodynamic response. PURPOSE: To investigate whether the beneficial effect of MPP can be explained by better electrical resynchronization. METHODS: Different LV lead locations were tested during biventricular (BiV) pacing and MPP in 29 CRT candidates...
July 17, 2018: Journal of Electrocardiology
Bradford D Winters
No abstract text is available yet for this article.
July 17, 2018: Journal of Electrocardiology
Elyar Ghafoori, Nathan Angel, Derek J Dosdall, Rob S MacLeod, Ravi Ranjan
BACKGROUND: Differentiating between atrial fibrillation (AF) and atrial tachycardia (AT) or atrial flutter (AFL) on surface ECG can be challenging. The same problem arises in animal models of AF, in which atrial arrhythmias are induced by pacing or pharmacological intervention with the goal of making mechanistic determinations. Some of these induced arrhythmias can be AFL or AT, even though it might appear as AF on the body-surface ECG based on irregular R-R intervals. We hypothesize that a dominant frequency (DF) analysis of the ECG can differentiate between the two distinct arrhythmias, even when it is not evident by the presence of flutter waves or beat-to-beat regularity when looking at brief recordings...
July 17, 2018: Journal of Electrocardiology
Radovan Smisek, Ivo Viscor, Pavel Jurak, Josef Halamek, Filip Plesinger
No abstract text is available yet for this article.
June 21, 2018: Journal of Electrocardiology
Jonas L Isaksen, Claus Graff, Christina Ellervik, Jan Skov Jensen, Henrik Ullits Andersen, Peter Rossing, Jorgen K Kanters, Magnus T Jensen
BACKGROUND: Repolarization is impaired in patients with type 1 diabetes mellitus (T1DM), and repolarization disturbances are associated with an increased mortality. To study cardiac repolarization, we assessed T-wave morphology in patients with T1DM without known heart disease. METHODS: 855 T1DM patients without known heart disease were matched 1:2 with 1710 people from a background population. Rate-corrected T-wave morphology markers were obtained. Patients were stratified by albuminuria...
May 24, 2018: Journal of Electrocardiology
Anil H Punjabi, Arlene Dermovsesian, Ankur A Karnik
Modern implantable cardioverter defibrillators (ICD) employ dynamic sensing algorithms in order to protect against fine ventricular fibrillation without oversensing intrinsic activity. We present a patient with a Medtronic ICD who had inhibition of pacing and not inappropriate shocks due to T wave oversensing (TWOS) in both true bipolar (TB) and integrated bipolar (IB) sensing configurations. Rather than alternatives such as lead revision or programming to an unacceptably insensitive value, this was solved by exchanging for a Boston Scientific ICD...
July 2018: Journal of Electrocardiology
B M Burton, K K Aras, W W Good, J D Tate, B Zenger, R S MacLeod
BACKGROUND: Computational models of myocardial ischemia often use oversimplified ischemic source representations to simulate epicardial potentials. The purpose of this study was to explore the influence of biophysically justified, subject-specific ischemic zone representations on epicardial potentials. METHODS: We developed and implemented an image-based simulation pipeline, using intramural recordings from a canine experimental model to define subject-specific ischemic regions within the heart...
July 2018: Journal of Electrocardiology
Marek Jastrzębski
No abstract text is available yet for this article.
July 2018: Journal of Electrocardiology
Maneesh Sud, Vijay S Chauhan, Mina Madan
In patients with suspected ST elevation myocardial infarction, it is of paramount importance to identify artifacts on the resting electrocardiogram that may be erroneously interpreted as ST segment deviations in order to prevent administration of potentially harmful pharmacotherapy and invasive coronary angiography. In this case report, we describe a pervasive square wave artifact, not previously reported, that was misdiagnosed as ST segment elevation by computer software and initial physician interpretation...
July 2018: Journal of Electrocardiology
Helder Pereira, Tom A Jackson, Benjamin Sieniewicz, Justin Gould, Cheng Yao, Steven Niederer, Christopher A Rinaldi
BACKGROUND: Cardiac resynchronization therapy (CRT) is now generally delivered via quadripolar leads. Assessment of the effect of different vector programs from quadripolar leads on ventricular activation can be now done using non-invasive electrocardiographic mapping (ECM). MATERIAL AND METHODS: In nineteen patients with quadripolar LV leads, activation maps were constructed. The total ventricular activation time (TVaT) and the time for the bulk of ventricular activation (VaT10-90 ) were calculated...
July 2018: Journal of Electrocardiology
Rupali Patil, Ramesh Karandikar
BACKGROUND: Electrocardiograms (ECGs) are routinely recorded and stored in a variety of paper or scanned image format. Current ECG recording machines record ECG on graph paper, also it provides digitized ECG signal along with automated cardiovascular diagnosis (CVD). However, such recording machines cannot analyse preserved paper ECG records as it requires input in terms of digitized signal. Therefore, it is important to extract ECG signal from these preserved paper ECG records using digitization method...
July 2018: Journal of Electrocardiology
Imane El Hajjaji, Giuliano Becker, Teresa Kus, Alain Vinet, Artur Berkovitz, Marcio Sturmer
BACKGROUND: Many diagnostic criteria for the differential diagnosis of wide complex tachycardia (WCT) are complex and not completely accurate. Incorrect diagnosis is also related to error in applying criteria. OBJECTIVES: To propose a novel reliable criterion for wide QRS complexes' differential diagnosis. MATERIAL AND METHODS: One hundred Electrocardiograms (ECGs) with wide QRS complexes were analyzed using the ECG software. Five variables were measured during the first 20 ms of QRS in leads V1 and V2 and compared between premature ventricular contraction (PVC) and conducted supraventricular impulse with bundle branch block (BBB) groups...
July 2018: Journal of Electrocardiology
David Wong, Yochai Birnbaum
ECG Quiz: Diffuse ST elevations with broad differential in 57 year old man.
July 2018: Journal of Electrocardiology
Alessandra Danese, Manuel Cappellari, Elia Pancheri, Giacomo Mugnai, Nicola Micheletti, Giampaolo Tomelleri, Monica Carletti, Giulia Turri, Vincenzo Marafioti, Salvatore Monaco, Bruno Bonetti, Paolo Bovi
BACKGROUND: Markers of dispersion of myocardial repolarization have been proposed to identify the patients at higher risk of malignant arrhythmic events. The aim of the present study is to assess a possible association of the electrocardiografic (ECG) markers of the dispersion of repolarization with the type of stroke, involvement of insula, neurological severity (National Institutes of Health Stroke Scale, NIHSS score), and disability (modified Rankin Scale, mRS score) in patients with a cerebrovascular event...
July 2018: Journal of Electrocardiology
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