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Journal of Electrocardiology

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https://www.readbyqxmd.com/read/30476648/a-deep-neural-network-learning-algorithm-outperforms-a-conventional-algorithm-for-emergency-department-electrocardiogram-interpretation
#1
Stephen W Smith, Brooks Walsh, Ken Grauer, Kyuhyun Wang, Jeremy Rapin, Jia Li, William Fennell, Pierre Taboulet
BACKGROUND: Cardiologs® has developed the first electrocardiogram (ECG) algorithm that uses a deep neural network (DNN) for full 12‑lead ECG analysis, including rhythm, QRS and ST-T-U waves. We compared the accuracy of the first version of Cardiologs® DNN algorithm to the Mortara/Veritas® conventional algorithm in emergency department (ED) ECGs. METHODS: Individual ECG diagnoses were prospectively mapped to one of 16 pre-specified groups of ECG diagnoses, which were further classified as "major" ECG abnormality or not...
November 16, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476647/lack-of-influence-of-sex-hormones-on-brugada-syndrome-associated-mutant-nav1-5-sodium-channel
#2
Guodong Yang, Jing Liu, Ya Wang, Yuan Du, Aiqun Ma, Tingzhong Wang
Brugada syndrome (BS) is an autosomal dominant disease. The most common causes of BS are loss-of-function mutations occur in the SCN5A gene which encodes the sodium channel protein Nav1.5. BS has a higher incidence rate in males and the underlying mechanisms of the gender inequality are not yet fully understood. Considering sex hormones are among the most important factors behind gender differences and have previously been shown to regulate the activity of multiple cardiac ion channels, we hypothesized that sex hormones also affect Nav1...
November 14, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476642/a-case-of-successful-radiofrequency-catheter-ablation-of-ventricular-tachycardia-from-the-noncoronary-cusp
#3
Yasuhiro Yokoyama, Hitoshi Hachiya, Tomonori Watanabe, Ayako Yokota, Takahiro Komori, Tomoyuki Kabutoya, Yasushi Imai, Kazuomi Kario
Idiopathic ventricular tachycardias (VTs) originating from the non-coronary cusp (NCC) are very rare. The previous reports suggested NCC-VTs were characterized by a narrower QRS duration and smaller III/II ratio than VTs originating from other coronary-cusps. We present a rare case of an NCC-VT with a local fragmented potential recorded at the NCC inconsistent with the known ECG characteristics of NCC-VTs.
November 9, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476646/transient-left-septal-fascicular-block-in-a-patient-with-stable-effort-angina-and-critical-proximal-obstruction-of-left-anterior-descending-coronary-artery
#4
Andrés Ricardo Pérez-Riera, Raimundo Barbosa-Barros, Rodrigo Daminello-Raimundo, Luiz Carlos de Abreu, Kjell Nikus
Several publications from our group and others have shown that a main cause of middle fiber block or left septal fascicular block of the left bundle of His is proximal obstruction of the left anterior descending coronary artery, before its first septal perforator branch, since this fascicle is the only one of the three fascicles irrigated exclusively by this artery. We present a case in which the phenomenon occurred transiently, causing prominent anterior QRS forces, confirmed by coronary angiography.
November 6, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476645/unexpected-reappearance-of-st-elevation-in-the-anterior-precordial-leads-shortly-after-an-acute-anterior-myocardial-infarction
#5
Antonio Lippolis, Paola Maria Buzzi, Ilaria Jane Romano, Annalisa De Concilio, Francesco Gentile
No abstract text is available yet for this article.
November 6, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476644/the-role-of-heart-rate-variability-heart-rate-turbulence-and-deceleration-capacity-in-predicting-cause-specific-mortality-in-chronic-heart-failure
#6
Salah S Al-Zaiti, Grzegorz Pietrasik, Mary G Carey, Mohammad Alhamaydeh, John M Canty, James A Fallavollita
BACKGROUND: The volume of regional denervated myocardium (D-M) on positron emission tomography has been recently suggested as a strong independent predictor of cause-specific mortality from sudden cardiac arrest (SCA) in chronic heart failure. We sought to evaluate whether ECG indices of global autonomic function predict risk of SCA to a similar degree as regional D-M. METHODS: Subjects enrolled in the Prediction of Arrhythmic Events using Positron Emission Tomography (PAREPET) study were included in this study...
November 6, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476641/shift-in-the-retrograde-atrial-activation-sequence-after-radiofrequency-catheter-ablation-in-left-variant-atypical-atrioventricular-nodal-reentrant-tachycardia
#7
Takashi Nakashima, Nobuhiro Takasugi, Yuki Sahashi, Tomoki Kubota, Masanori Kawasaki
The role of left AV nodal (SVN) connections in the genesis of "left-variant" atypical atrioventricular nodal reentrant tachycardia (AVNRT) and those with multiple retrograde pathways remain unclear. We describe an unusual case of "left-variant" atypical AVNRT, where change in the retrograde earliest atrial activation site (REAAS) at the coronary sinus (CS) following radiofrequency catheter ablation (RFCA) was observed. Our observation suggests that the REAAS, that is, the left AVN connections, could participate in the formation of the reentrant circuit of "left-variant" atypical AVNRT...
November 6, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476638/poor-reliability-of-p-wave-terminal-force-v-1-in-ischemic-stroke
#8
Jithin K Sajeev, Anoop N Koshy, Helen Dewey, Jonathan M Kalman, Manini Bhatia, Louise Roberts, Jennifer C Cooke, Tanya Frost, Rachel Denver, Andrew W Teh
INTRODUCTION: Several ECG markers are postulated to represent underlying atrial remodelling and have been associated with ischemic stroke. P-wave terminal force in lead V1 (PTFV1 ) is one such marker. We examined the factors that contribute to the reliability of PTFV1 and its association with ischemic stroke. MATERIAL AND METHODS: Four hundred and thirty-five patients that presented with an ischemic stroke or transient ischemic attack (TIA) were identified through a prospectively maintained multi-site institutional stroke database...
November 6, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476637/association-between-t-wave-discordance-and-the-development-of-heart-failure-in-left-bundle-branch-block-patients-results-from-the-copenhagen-ecg-study
#9
Johannes Riis Jensen, Kristian Kragholm, Karoline Willum Bødker, Rikke Mortensen, Claus Graff, Adrian Pietersen, Jonas Bille Nielsen, Christoffer Polcwiartek, Bhupendar Tayal, Christian Torp-Pedersen, Peter Søgaard, Steen Møller Hansen
BACKGROUND: In left bundle branch block (LBBB), discrepancies between depolarization and repolarization of the heart can be assessed by similar direction (concordant) or opposite direction (discordant) of the lateral T-waves compared to the direction of the QRS complex and by the QRS-T angle. We examined the association between discordant T-waves and high QRS-T angles for heart failure development in primary care LBBB patients. METHODS: Between 2001 and 2011, we identified 2540 patients from primary care with LBBB without overt heart failure...
November 5, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476636/case-report-apical-variant-hypertrophic-cardiomyopathy-simulating-an-acute-inferior-myocardial-infarction
#10
Juan Morales, Miller Giraldo
We present a female patient who arrived to the emergency department with chest pain without known medical history at the time of consultation. Considering her risk factors and electrocardiographic findings, it was decided to perform a coronary catheterization under the suspicion of acute myocardial infarction. The catheterization and another studies was negative for coronary artery disease. Additional studies were conclusive for apical variant hypertrophic cardiomyopathy or Yamaguchi syndrome.
November 2, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476635/electrocardiographic-changes-after-implantation-of-a-left-ventricular-assist-device-potential-implications-for-subcutaneous-defibrillator-therapy
#11
Christos Zormpas, Johanna Mueller-Leisse, Thorben Koenig, Jan D Schmitto, Christian Veltmann, David Duncker
BACKGROUND: Implantation of a left ventricular assist device (LVAD) leads to a diverse spectrum of changes on the twelve-lead surface electrocardiogram (ECG). We aimed to elucidate the changes of the surface ECG in patients after LVAD implantation potentially impacting ECG based screening tests of subcutaneous implantable cardioverter-defibrillators (S-ICD). METHODS: Patients from 2005 until 2017 with a documented twelve-lead ECG before and after LVAD implantation were included...
November 2, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476634/continuous-heart-rate-monitoring-for-automatic-detection-of-atrial-fibrillation-with-novel-bio-sensing-technology
#12
Aviram Hochstadt, Ehud Chorin, Sami Viskin, Arie Lorin Schwartz, Natan Lubman, Raphael Rosso
BACKGROUND: Asymptomatic atrial fibrillation [AF] is an important cause of fatal or disabling stroke. A continuous heart-rate monitoring device, comfortable enough to be worn continuously and reliable enough to detect AF, would allow for prompt initiation of anticoagulation therapy to prevent stroke. METHODS: We studied a new custom-made wearable photo-plethysmograph [PPG] wrist-watch sensor, specifically designed for continuous heart rate monitoring and incorporating contact and motion noise-filters...
November 1, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476640/the-predictive-value-of-avr-in-determining-the-infarct-related-artery-during-primary-percutaneous-coronary-intervention
#13
Ayman Gaballa, Wala Farid, Ahmad Al-Kersh, Rajesh Rajan, Mohammed Al Jarallah
BACKGROUND: Isolation of infract related artery and timely revascularisation remains vital in the setting of primary percutaneous coronary intervention. OBJECTIVES: To analyse the predictive value of ST-T changes in lead aVR in inferior myocardial infarction in terms of prognosis and timely risk stratification. METHODS: We conducted a prospective analysis of acute inferior wall myocardial infarction patients. One hundred patients were categorised into two groups according to the culprit artery: group I, right coronary artery (RCA) and group II, left circumflex coronary artery (LCX), with 50 patients in each group...
October 30, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476633/long-term-prognostic-significance-of-terminal-qrs-distortion-on-patients-with-stemi-and-its-correlation-with-the-grace-scoring-system
#14
Ahmet Yılmaz, Kenan Demir, Recep Karataş, Mustafa Çelik, Ahmet Avcı, Fikret Keleş, Ahmet Erseçgin, Nazif Aygül, Bülent Behlül Altunkeser
No abstract text is available yet for this article.
October 30, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476631/prevalence-of-junctional-st-depression-with-tall-symmetrical-t-waves-in-a-pre-hospital-field-triage-system-for-stemi-patients
#15
Ruben W de Winter, Rob Adams, Giovanni Amoroso, Yolande Appelman, Lucia Ten Brinke, Bart Huybrechts, Pieternel van Exter, Robbert J de Winter
INTRODUCTION: The prevalence of the junctional ST-depression with tall symmetrical T-waves in a field triage system for ST-Elevation Myocardial Infarction (STEMI) is unknown. MATERIAL AND METHODS: We prospectively collected all transmitted 12-lead electrocardiograms (ECGs) from the STEMI field triage system in Amsterdam from 2011 to 2013. Electrocardiograms with junctional ST-depression with tall symmetrical T-waves were recognized and angiographic documentation and clinical follow up were collected...
October 18, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30413248/ideal-admission-electrocardiographic-parameters-in-stemi-what-else-do-we-need-to-learn
#16
LETTER
Mert İlker Hayıroğlu, Ceyhan Türkkan, Ahmet İlker Tekkeşin
No abstract text is available yet for this article.
October 13, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476632/atrial-flutter-and-embolic-risk-the-relationship-between-atrial-flutter-cycle-length-and-left-atrial-appendage-function
#17
EDITORIAL
Ana Paula Susin Osório, Luciana Eder Martins Barros Simoni, Antonio Lessa Gaudie Ley, Grasiele Bess de Oliveira, Roberto Tofani Santanna, Marcelo Haertel Miglioranza, Gustavo Glotz de Lima, Vidal Essebag, Tiago Luiz Luz Leiria
BACKGROUND: The potential for thromboembolism in atrial flutter (AFL) is different from atrial fibrillation. AFL cycle length (AFL-CL) may be related to reduced left atrial appendage (LAA) function. Very rapid AFL-CL can lead to mechanical and electrophysiological disorders that contribute to lower LAA emptying velocity (LAEV). The aim of this study is to relate atrial flutter cycle length with LAEV and its role in thrombogenesis. METHODS: Cross-sectional study of patients with atrial flutter AFL who underwent transoesophageal echocardiography (TEE) before catheter ablation or electric cardioversion...
October 9, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476639/electrocardiographic-characteristics-before-and-after-correction-of-right-sided-congenital-heart-defects-in-children-and-its-relation-to-prognosis
#18
REVIEW
Vivian P Kamphuis, Daphne Raad, Martina Nassif, Cees A Swenne, Nico A Blom, Arend D J Ten Harkel
No abstract text is available yet for this article.
October 4, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30476643/flecainide-overdose-presenting-with-long-qt-and-acute-takotsubo-cardiomyopathy
#19
George Bodziock, Chadwick Armstrong, Jay Montgomery
No abstract text is available yet for this article.
September 27, 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30497763/yield-and-consistency-of-arrhythmia-detection-with-patch-electrocardiographic-monitoring-the-multi-ethnic-study-of-atherosclerosis
#20
Susan R Heckbert, Thomas R Austin, Paul N Jensen, James S Floyd, Bruce M Psaty, Elsayed Z Soliman, Richard A Kronmal
BACKGROUND: Patch electrocardiographic (ECG) monitors permit extended noninvasive ambulatory monitoring. To guide use of these devices, information is needed about their performance. We sought to determine in a large general population sample the acceptability of patch ECG monitors, the yield of arrhythmia detection, and the consistency of findings in participants monitored twice. METHODS: In the Multi-Ethnic Study of Atherosclerosis, 1122 participants completed one or two monitoring episodes using the Zio Patch XT, a single-channel ECG patch monitor capable of recording for 14 days...
November 2018: Journal of Electrocardiology
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