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Journal of Electrocardiology

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https://www.readbyqxmd.com/read/29031413/experiences-in-digitizing-and-digitally-measuring-a-paper-based-ecg-archive
#1
Arttu Holkeri, Antti Eranti, Tuomas V Kenttä, Kai Noponen, M Anette E Haukilahti, Tapio Seppänen, M Juhani Junttila, Tuomas Kerola, Harri Rissanen, Markku Heliövaara, Paul Knekt, Aapo L Aro, Heikki V Huikuri
BACKGROUND: No established method for digitizing and digital measuring of paper electrocardiograms (ECG) exists. We describe a paper ECG digitizing and digital measuring process, and report comparability to manual measurements. METHODS: A paper ECG was recorded from 7203 health survey participants in 1978-1980. With specific software, the ECGs were digitized (ECG Trace Tool), and measured digitally (EASE). A sub-sample of 100 ECGs was selected for manual measurements...
September 27, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29033052/regular-tachycardia-despite-wenckebach-atrioventricular-conduction
#2
Stephen Fuest, Marye J Gleva, Amit Noheria
We present a 21-year-old woman status post orthotopic heart transplantation initially presenting with a regular narrow complex tachycardia at 159beats/min. With intravenous diltiazem the rhythm transitioned to a regular tachycardia at 106beats/min, 2/3rd of the initial heart rate. We demonstrate this to be a novel description of 3:2second-degree Mobitz type I atrioventricular block (Wenckebach) with the absence of the hallmark regularly irregular (grouped beating) pattern.
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29032808/torso-geometry-reconstruction-and-body-surface-electrode-localization-using-three-dimensional-photography
#3
Erick A Perez-Alday, Jason A Thomas, Muammar Kabir, Golriz Sedaghat, Nichole Rogovoy, Eelco van Dam, Peter van Dam, William Woodward, Cristina Fuss, Maros Ferencik, Larisa G Tereshchenko
We conducted a prospective clinical study (n=14; 29% female) to assess the accuracy of a three-dimensional (3D) photography-based method of torso geometry reconstruction and body surface electrodes localization. The position of 74 body surface electrocardiographic (ECG) electrodes (diameter 5mm) was defined by two methods: 3D photography, and CT (marker diameter 2mm) or MRI (marker size 10×20mm) imaging. Bland-Altman analysis showed good agreement in X (bias -2.5 [95% limits of agreement (LoA) -19.5 to 14...
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29031412/a-good-friend-to-learn-and-teach-electrocardiography-a-comment-on-the-book-ecg-masters-collection-by-shenasa-josephson-estes-amsterdam-and-scheinman
#4
Jerónimo Farré
No abstract text is available yet for this article.
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29021091/an-evaluation-of-multiple-algorithms-for-the-measurement-of-the-heart-rate-corrected-jtpeak-interval
#5
Jean-Philippe Couderc, Shiyang Ma, Alex Page, Connor Besaw, Jean Xia, W Brian Chiu, Johan de Bie, Jose Vicente, Martino Vaglio, Fabio Badilini, Saeed Babaeizadeh, Cheng-Hao Simon Chien, Mathias Baumert
Interest in the effects of drugs on the heart rate-corrected JTpeak (JTpc) interval from the body-surface ECG has spawned an increasing number of scientific investigations in the field of regulatory sciences, and more specifically in the context of the Comprehensive in vitro Proarrhythmia Assay (CiPA) initiative. We conducted a novel initiative to evaluate the role of automatic JTpc measurement technologies by comparing their ability to distinguish multi- from single-channel blocking drugs. A set of 5232 ECGs was shared by the FDA (through the Telemetric and Holter ECG Warehouse) with 3 ECG device companies (AMPS, Mortara, and Philips)...
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29021090/rbbb-tachycardia-with-north-west-axis-what-is-the-mechanism
#6
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Sreevilasam Pushpangadhan Abhilash, Ajitkumar Valaparambil
RBBB tachycardia with NW axis is considered to be VT unless proved otherwise. However underlying conduction system disease can produce electrocardiographic patterns suggestive of bundle branch block with extreme left axis which can cause difficulty in differentiating VT from SVT as in this case.
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28988690/impact-of-number-of-co-existing-rotors-and-inter-electrode-distance-on-accuracy-of-rotor-localization
#7
Konstantinos N Aronis, Hiroshi Ashikaga
BACKGROUND: Conflicting evidence exists on the efficacy of focal impulse and rotor modulation on atrial fibrillation ablation. A potential explanation is inaccurate rotor localization from multiple rotors coexistence and a relatively large (9-11mm) inter-electrode distance (IED) of the multi-electrode basket catheter. METHODS AND RESULTS: We studied a numerical model of cardiac action potential to reproduce one through seven rotors in a two-dimensional lattice. We estimated rotor location using phase singularity, Shannon entropy and dominant frequency...
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28987296/yellow-phosphorus-induced-brugada-phenocopy
#8
Mayakrishnan Dharanipradab, Stalin Viswanathan, Gokula Raman Kumar, Vijayalatchumy Krishnamurthy, Daphene Divya Stanley
BACKGROUND: Metallic phosphides (of aluminum and phosphide) and yellow phosphorus are commonly used rodenticide compounds in developing countries. Toxicity of yellow phosphorus mostly pertains to the liver, kidney, heart, pancreas and the brain. Cardiotoxicity with associated Brugada ECG pattern has been reported only in poisoning with metallic phosphides. METHODS AND RESULTS: Brugada phenocopy and hepatic dysfunction were observed in a 29-year-old male following yellow phosphorus consumption...
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28985887/the-dressler-de-winter-sign-of-acute-proximal-lad-occlusion
#9
Laszlo Littmann
No abstract text is available yet for this article.
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28985886/debatable-issues-in-automated-ecg-reporting
#10
Peter W Macfarlane, Jay W Mason, Paul Kligfield, Claire E Sommargren, Barbara Drew, Peter van Dam, Roger Abächerli, David E Albert, Morrison Hodges
Although automated ECG analysis has been available for many years, there are some aspects which require to be re-assessed with respect to their value while newer techniques which are worthy of review are beginning to find their way into routine use. At the annual International Society of Computerized Electrocardiology conference held in April 2017, four areas in particular were debated. These were a) automated 12 lead resting ECG analysis; b) real time out of hospital ECG monitoring; c) ECG imaging; and d) single channel ECG rhythm interpretation...
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28982476/an-unusual-ecg-deflection-fact-or-artifact
#11
Daniel F Kupsky, Marc K Lahiri, Claudio D Schuger
Peculiar electrocardiographic findings are not unusual and upon careful review can often be clarified. We present a case of an 85year-old woman with no previous cardiac history, incidentally discovered high grade atrioventricular block, and a puzzling electrocardiographic complex of unclear etiology which defies reasonable physiological explanations. The finding resembled a tiny QRS in a perfectly regular R-R interval following only non-conducted P-waves. The patient declined further work-up, so a definite cause could not be determined, but based on history, complex morphology, and inability to reproduce or explain the findings, we were compelled to accept the finding as an artifact...
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28969847/interatrial-block-frailty-and-prognosis-in-elderly-patients-with-myocardial-infarction
#12
Eva Bernal, Antoni Bayés-Genís, Albert Ariza-Solé, Francesc Formiga, Maria T Vidán, Luis Alberto Escobar-Robledo, Jaime Aboal, Lídia Alcoberro, Carme Guerrero, Iván Ariza-Segovia, Ana Hernandez de Benito, Pau Vilardell, José Carlos Sánchez-Salado, Victoria Lorente, Antoni Bayés de Luna, Manuel Martinez-Sellés
No abstract text is available yet for this article.
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28964425/a-novel-ecg-detector-performance-metric-and-its-relationship-with-missing-and-false-heart-rate-limit-alarms
#13
Chathuri Daluwatte, Jose Vicente, Loriano Galeotti, Lars Johannesen, David G Strauss, Christopher G Scully
PURPOSE: Performance of ECG beat detectors is traditionally assessed on long intervals (e.g.: 30min), but only incorrect detections within a short interval (e.g.: 10s) may cause incorrect (i.e., missed+false) heart rate limit alarms (tachycardia and bradycardia). We propose a novel performance metric based on distribution of incorrect beat detection over a short interval and assess its relationship with incorrect heart rate limit alarm rates. BASIC PROCEDURES: Six ECG beat detectors were assessed using performance metrics over long interval (sensitivity and positive predictive value over 30min) and short interval (Area Under empirical cumulative distribution function (AUecdf) for short interval (i...
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28942266/incessant-arrhythmogenic-atrial-ectopic-rhythm-what-is-the-mechanism
#14
Juan Benezet-Mazuecos, Juan José de la Vieja, José Manuel Rubio, Pepa Sanchez-Borque, Ángel Miracle, Jerónimo Farré
No abstract text is available yet for this article.
September 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28918214/efficient-noise-tolerant-estimation-of-heart-rate-variability-using-single-channel-photoplethysmography
#15
Reza Firoozabadi, Eric D Helfenbein, Saeed Babaeizadeh
BACKGROUND: The feasibility of using photoplethysmography (PPG) for estimating heart rate variability (HRV) has been the subject of many recent studies with contradicting results. Accurate measurement of cardiac cycles is more challenging in PPG than ECG due to its inherent characteristics. METHODS: We developed a PPG-only algorithm by computing a robust set of medians of the interbeat intervals between adjacent peaks, upslopes, and troughs. Abnormal intervals are detected and excluded by applying our criteria...
August 18, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28939174/ventricular-repolarization-alterations-in-women-with-angina-pectoris-and-suspected-coronary-microvascular-dysfunction
#16
Nynne Dose, Marie Mide Michelsen, Naja Dam Mygind, Adam Pena, Christina Ellervik, Peter R Hansen, Jørgen K Kanters, Eva Prescott, Jens Kastrup, Ida Gustafsson, Henrik Steen Hansen
OBJECTIVES: CMD could be the explanation of angina pectoris with no obstructive CAD and may cause ventricular repolarization changes. We compared T-wave morphology and QTc interval in women with angina pectoris with a control group as well as the associations with CMD. METHODS: Women with angina pectoris and no obstructive coronary artery disease (n=138) and age-matched controls were compared in regard to QTc interval and morphology combination score (MCS) based on T-wave asymmetry, flatness and presence of T-wave notch...
August 17, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28928045/the-electrocardiographic-triangular-qrs-st-t-waveform-pattern-in-patients-with-st-segment-elevation-myocardial-infarction-incidence-pathophysiology-and-clinical-implications
#17
Alberto Cipriani, Gianpiero D'Amico, Giulia Brunello, Martina Perazzolo Marra, Federico Migliore, Luisa Cacciavillani, Giuseppe Tarantini, Barbara Bauce, Sabino Iliceto, Domenico Corrado, Alessandro Zorzi
BACKGROUND: A specific ECG pattern of presentation of ST-segment elevation acute myocardial infarction (STEMI), characterized by "triangular QRS-ST-T waveform" (TW), has been associated with poor in-hospital prognosis but longitudinal data on its incidence and clinical impact are lacking. We prospectively evaluated the incidence and prognostic meaning of the TW pattern in a cohort of consecutive STEMI patients. METHODS: All STEMI patients who presented within 12h of symptoms onset and showed no complete bundle branch block or paced ventricular rhythm were included...
August 16, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28918213/myocardium-at-risk-assessed-by-electrocardiographic-scores-and-cardiovascular-magnetic-resonance-a-mitocare-substudy
#18
Maria Sejersten, Yama Fakhri, Marianne Pape, Svend Eggert Jensen, Einar Heiberg, Henrik Engblom, Trygve S Hall, Dan Atar, Peter Clemmensen
INTRODUCTION: The myocardium at risk (MaR) represents the quantitative ischemic area destined to myocardial infarction (MI) if no reperfusion therapy is initiated. Different ECG scores for MaR have been developed, but there is no consensus as to which should be preferred. OBJECTIVE: Comparisons of ECG scores and Cardiac Magnetic Resonance (CMR) for determining MaR. METHODS: MaR was determined by 3 different ECG scores, and by CMR in ST-segment elevation MI (STEMI) patients from the MITOCARE cardioprotection trial...
August 16, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28916175/early-sepsis-detection-in-critical-care-patients-using-multiscale-blood-pressure-and-heart-rate-dynamics
#19
Supreeth P Shashikumar, Matthew D Stanley, Ismail Sadiq, Qiao Li, Andre Holder, Gari D Clifford, Shamim Nemati
Sepsis remains a leading cause of morbidity and mortality among intensive care unit (ICU) patients. For each hour treatment initiation is delayed after diagnosis, sepsis-related mortality increases by approximately 8%. Therefore, maximizing effective care requires early recognition and initiation of treatment protocols. Antecedent signs and symptoms of sepsis can be subtle and unrecognizable (e.g., loss of autonomic regulation of vital signs), causing treatment delays and harm to the patient. In this work we investigated the utility of high-resolution blood pressure (BP) and heart rate (HR) times series dynamics for the early prediction of sepsis in patients from an urban, academic hospital, meeting the third international consensus definition of sepsis (sepsis-III) during their ICU admission...
August 16, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28916172/biometric-verification-by-cross-correlation-analysis-of-12-lead-ecg-patterns-ranking-of-the-most-reliable-peripheral-and-chest-leads
#20
Vessela Krasteva, Irena Jekova, Roger Abächerli
BACKGROUND: Electrocardiogram (ECG)-based biometrics relies on the most stable and unique beat patterns, i.e. those with maximal intra-subject and minimal inter-subject waveform differences seen from different leads. We investigated methodology to evaluate those differences, aiming to rank the most prominent single and multi-lead ECG sets for biometric verification across a large population. METHODS: A clinical standard 12-lead resting ECG database, including 460 pairs of remote recordings (distanced 1year apart) was used...
August 16, 2017: Journal of Electrocardiology
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