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Journal of Electrocardiology

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https://www.readbyqxmd.com/read/28330682/the-impact-of-posture-on-the-cardiac-depolarization-and-repolarization-phases-of-the-qt-interval-in-healthy-subjects
#1
Yurie Obata, Pavel Ruzankin, Qi Jia Ong, Dan E Berkowitz, Ronald D Berger, Jochen Steppan, Viachaslau Barodka
BACKGROUND: Postural changes affect both heart rate and the QT interval. OBJECTIVE: To investigate the effects of postural changes on the depolarization and repolarization phases of the QT interval. METHODS: A three lead ECG from 12 healthy young volunteers was recorded in the standing, sitting and in the supine positions. For the purpose of this study, we defined the depolarization phase as the QRS complex plus the ST segment and the repolarization phase as the duration of the T wave...
March 12, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28284434/a-simple-ecg
#2
EDITORIAL
Adrian Baranchuk
No abstract text is available yet for this article.
March 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28274543/electrocardiographic-conundrum-what-is-the-reason-of-qrs-axis-variability
#3
Giuseppe Picciolo, Lilia Oreto
No abstract text is available yet for this article.
February 22, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28274541/atrial-fibrillation-in-transcatheter-aortic-valve-implantation-patients-incidence-outcome-and-predictors-of-new-onset
#4
David Zweiker, Mario Fröschl, Stephanie Tiede, Paul Weidinger, Johannes Schmid, Martin Manninger, Helmut Brussee, Robert Zweiker, Josepha Binder, Heinrich Mächler, Wolfgang Marte, Robert Maier, Olev Luha, Albrecht Schmidt, Daniel Scherr
BACKGROUND: There is controversial evidence if atrial fibrillation (AF) alters outcome after transcatheter aortic valve implantation (TAVI). TAVI itself may promote new-onset AF (NOAF). METHODS: We performed a single-center study including 398 consecutive patients undergoing TAVI. Before TAVI, patients were divided into a sinus rhythm (SR) group (n=226, 57%) and baseline AF group (n=172, 43%) according to clinical records and electrocardiograms. Furthermore, incidence and predictors of NOAF were recorded...
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28274540/the-effect-of-metilpheniydate-risperidone-and-combination-therapy-on-ecg-in-children-with-attention-deficit-hyperactivity-disorder
#5
Derya Karpuz, Olgu Hallioglu, Fevziye Toros, Bahar Tasdelen
INTRODUCTION: This study is to investigate ventricular repolarization on electrocardiogram (ECG) in a pediatric population receiving methylphenidate (MPH), risperidone (RIS) and combined therapy. METHODS: A total of 215 patients between 6 and 12years with ADHD/conduct disorder receiving methylphenidate, risperidone and combined therapy for minimum 3months and an untreated ADHD group (n=76) was consecutively included in the study. Twelve lead ECG parameters including mean QT, QTc, T-peak to T-end (TpTe) intervals, TpTe dispersion and TpTe/QT ratio were compared...
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28262259/diagnostical-mistakes-in-ablation-procedures-associated-with-a-high-placement-of-the-leads-v1-v3
#6
Damián Longo, Claudio Poliserpi, Francisco Toscano Quilon, Pedro Díaz Uberti, Carlos López, Javier García-Niebla, Irma Ramella
The misplacement of electrodes for surface electrocardiogram (ECG) recording that we use daily as a reference for mapping precise locations in invasive procedures may, besides inducing diagnostical mistakes, greatly increase the duration of the procedure and making more feasible the incidence of complications, especially in ablation of arrhythmic substrates of ventricular outflow tracts such as premature ventricular contractions (PVC's) and accessory pathways, if the right precordial electrodes (V1-V3) are higher positioned...
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28262258/safer-and-escape-junctional-rhythm-a-singular-trigger-for-pacemaker-mediated-tachycardia
#7
Pasquale Crea, Teresa Crea, Giuseppe Picciolo, Francesco Luzza
A 70-year-old man, who previously received a dual chamber pacemaker for paroxysmal AV block (Sorin Symphony DR 2550), was noted on telemetry to have multiple episodes of rapid ventricular pacing at approximately 120bpm. Evaluation of the telemetry strips revealed that all of the rapid ventricular pacing episodes were initiated by brief runs of escape junctional rhythm. Programmed bradycardia parameters were AAI SafeR with lower rate limit of 50bpm.
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28262257/t-wave-axis-deviation-and-qrs-t-angle-controversial-indicators-of-incident-coronary-heart-events
#8
REVIEW
Polychronis Dilaveris, Christos-Konstantinos Antoniou, Konstantinos Gatzoulis, Dimitrios Tousoulis
Abnormal orientation of the T-wave axis and increased angle between the QRS complex (depolarization) and the T-wave (repolarization) have long been assumed to provide a global measure of repolarization abnormality, and have been used to assess ventricular repolarization. The ability of the T wave axis deviation and the QRS-T angle to predict incident coronary heart events was examined in several studies. However, conflicting results have led to significant controversy in the literature concerning their purported ability...
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28256215/mechanism-and-prognostic-role-of-qr-in-v1-in-patients-with-pulmonary-arterial-hypertension
#9
Marcin Waligóra, Grzegorz Kopeć, Kamil Jonas, Anna Tyrka, Agnieszka Sarnecka, Tomasz Miszalski-Jamka, Małgorzata Urbańczyk-Zawadzka, Piotr Podolec
BACKGROUND: The presence of qR pattern in lead V1 of the 12-lead surface ECG has been proposed as a risk marker of death in patients with pulmonary arterial hypertension (PAH). We aimed to validate these findings in the modern era of PAH treatment and additionally to assess the relation of qR in V1 to PAH severity. We also investigated the possible mechanisms underlying this ECG sign. METHODS: Consecutive patients with PAH excluding patients with congenital heart defect were recruited between February 2008 and January 2016...
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28249683/electrocardiogram-qrs-duration-and-associations-with-telomere-length-a-cross-sectional-analysis-in-australian-rural-diabetic-and-non-diabetic-population
#10
Yuling Zhou, Herbert Jelinek, Brett D Hambly, Craig S McLachlan
Prolonged electrocardiogram QRS durations are often present in aging populations. Shorter telomere length is considered a biomarker of cellular aging. Decreased telomere length has been associated with coronary artery risk, and ventricular remodeling. However, the association between telomeres and cardiac conduction abnormalities, such as increased QRS duration are not well understood. A retrospective cross-sectional population was obtained from the CSU Diabetes Screening Research Initiative database where 273 participants had both ECG-derived QRS duration and DNA to permit leukocyte telomere length (LTL) determination...
February 20, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28238439/insights-into-channelopathies-progress-in-clinical-practice-and-research
#11
LETTER
Paweł Tomasz Matusik
No abstract text is available yet for this article.
February 13, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28292523/exercise-qtc-is-associated-with-diffuse-interstitial-fibrosis-reflected-by-lower-approximated-t1-relaxation-time-in-hypertrophic-cardiomyopathy-patients
#12
Celia P Corona-Villalobos, Sudip Saha, Iraklis Pozios, David Hurtado-de-Mendoza Paz, Lars Sorensen, Jorge Gonzalez Cordoba, Ketty Dolores-Cerna, Ihab R Kamel, Wilfredo Mormontoy Laurel, David A Bluemke, Theodore P Abraham, Stefan L Zimmerman, M Roselle Abraham
No abstract text is available yet for this article.
February 12, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28274542/hypokalemia-in-women-and-methadone-therapy-are-the-strongest-non-cardiologic-factors-associated-with-qt-prolongation-in-an-emergency-department-setting
#13
Keith A Marill, Emily S Miller
BACKGROUND: Our primary objective was to determine the adjusted quantitative associations of clinical predictors with QT prolongation, a defining cause of Torsades de Pointes (TdP). METHODS: A retrospective cohort study was performed on consecutive emergency department patients identified by ECG acquisition date, and heart rate corrected QT (QTc) and QRS durations. QTc was modeled as a function of clinical predictors with multiple linear regression. RESULTS: 1010 patients were included...
February 10, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28190561/correlation-between-the-high-frequency-content-of-the-qrs-on-murine-surface-electrocardiogram-and-the-sympathetic-nerves-density-in-left-ventricle-after-myocardial-infarction-experimental-study
#14
Golriz Sedaghat, Ryan T Gardner, Muammar M Kabir, Elyar Ghafoori, Beth A Habecker, Larisa G Tereshchenko
Denervated post-infarct scar is arrhythmogenic. Our aim was to compare QRS frequency content in denervated and innervated left ventricular (LV) scar. In-vivo single lead ECG telemetry device was implanted in 17 heterozygous PTPσ (HET) and 7 lacking PTPσ (KO) transgenic mice. Myocardial infarction (MI) with reperfusion and sham surgery was performed. HET mice developed a denervated scar, whereas KO mice developed innervated scar. The power spectral density was used to assess the QRS frequency content. Denervated as compared to innervated post-MI scar was characterized by the higher relative contribution of 300-500Hz (14±1 vs...
February 3, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28215710/altered-mental-status-in-the-emergency-department-can-an-electrocardiogram-show-the-right-way-to-go
#15
Andre Dias, Emiliana Franco, Jasmine Martinez, Vincent M Figueredo
A 38-year-old African American male patient with a past medical history of human immunodeficiency virus and schizophrenia who was noncompliant with medications presented to the emergency department (ED) after activation of the local crisis response center for altered mental status. Upon arrival he was lethargic and uncooperative, unable to provide any significant details apart from pleuritic chest pain. His blood pressure was 133/88 mmHg, heart rate 43 beats per minute and initial body temperature 36.1 °C which prompted an electrocardiogram (EKG)...
February 2, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28202194/study-of-factors-affecting-the-progression-and-termination-of-drug-induced-torsade-de-pointes-in-two-dimensional-cardiac-tissue
#16
Ponnuraj Kirthi Priya, M Ramasubba Reddy
INTRODUCTION: To study the conditions leading to the initiation and termination of drug induced Torsade de pointes (TdP) along with QT prolongation. METHODS: A 2D anisotropic transmural section of the ventricular myocardium is modeled using the TP06 equations and the cells are interconnected with gap junction conductances (GJC). The tissue is remodeled by reducing the repolarization reserve (by increasing calcium current (ICaL)) of all cells thus making them vulnerable to development of early after depolarizations (EADs)...
February 2, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28189281/ecg-quiz-murphy-s-law-strikes-again
#17
Vanessa Al Rashida, J Evan Astin, Irwin Hoffman
ECG Quiz: An unusual ECG in a 77year old man with chest pain.
February 2, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28189280/junctional-ectopic-tachycardia-in-late-period-after-early-postoperative-complete-atrioventricular-block-messenger-of-return-to-normal-sinus-rhythm-explanation-with-four-case-series
#18
Isa Ozyilmaz, Yakup Ergul, Sinem Ozyilmaz, Alper Guzeltas
Junctional ectopic tachycardia(JET) is a rare childhood arrhythmia originating from the area adjacent to the atrioventricular(AV) node. It often occurs after surgical procedures like repair of Tetralogy of Fallot, atrioventricular septal defect and ventricular septal defect, which are all performed in that area. While AV block (AVB) can occur after JET, it is very rare for late JET occurring after early postoperative AVB to be followed by normal sinus rhythm (NSR). There is no information in the literature related to the pathophysiology of this phenomenon...
February 1, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28118928/atrial-fibrillation-detected-by-external-loop-recording-for-seven-days-or-two-day-simultaneous-holter-recording-a-comparison-in-patients-with-ischemic-stroke-or-transient-ischemic-attack
#19
Michala Herskind Sejr, Jens Cosedis Nielsen, Dorte Damgaard, Birgitte Forsom Sandal, Ole May
Atrial fibrillation (AF) is the most common cardiac cause of ischemic stroke and transient ischemic attack (IS/TIA). AIM: To compare the diagnostic value of seven-day external loop recording (ELR) and two-day Holter recording for detecting AF after IS/TIA. METHODS: 191 IS/TIA patients without AF history. Endpoint was AF >30s. We started two-day Holter recording and seven-day ELR simultaneously. RESULTS: Seven-day ELR and two-day Holter recording detected the same three AF patients...
January 17, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28117102/a-challenging-case-of-narrow-complex-tachycardia
#20
Vivek Reddy, Shanker Kundumadam, Pradeep Kathi, Nadia Nasser, Mazhar Khan
No abstract text is available yet for this article.
January 17, 2017: Journal of Electrocardiology
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