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("ECG" OR " EKG") AND ("Ventricular Tachycardia" OR "VT")

Tanawat Attachaipanich, Rungroj Krittayaphong
BACKGROUND: Fragmented QRS (fQRS) complex is an electrocardiographic pattern that reflects the inhomogeneity of ventricular depolarization. The aims of this study were to determine the prognostic significance of fQRS for predicting in-hospital life-threatening arrhythmic complications in ST-elevation myocardial infarction (STEMI) patients, and to identify the most appropriate duration of cardiac rhythm monitoring in STEMI patients with fQRS. METHODS: Patients diagnosed with and treated for STEMI at Siriraj Hospital (Bangkok, Thailand) during 2009-2012 were enrolled...
August 17, 2018: Annals of Noninvasive Electrocardiology
Arina Prihestri Nugraheni, Irsad Andi Arso, Erika Maharani
Background: Idiopathic outflow tract ventricular premature contraction (VPC) can evolve into ventricular tachycardia (VT) via triggered activity mechanism. Transmural dispersion of repolarization (TDR) might play a role in idiopathic outflow tract VT by inducing phase 2 early afterdepolarization (EAD) and serve as the functional substrate for VT. Tp-Te/QT ratio as an arrhythmogenesis index has been reported to be associated with the incidence of ventricular arrhythmia. This study aims to investigate the association between Tp-Te/QT ratio with VT incidence in idiopathic outflow tract VPC...
August 2018: Cardiology Research
Alexandre Gamet, Bruno Degand, François Le Gal, Nicolas Bidegain, Anne Delaubier, Brigitte Gilbert-Dussardier, Luc Christiaens, Rodrigue Garcia
BACKGROUND: Patient prognosis in type 1 myotonic dystrophy (DM1) is very poor. Annual 24-hour holter ECG monitoring is recommended but its relevance is debated. Main objective was to determine whether holter ECG parameters could predict global death in DM1 patients and secondarily to assess whether they could predict cardiovascular events and sudden cardiac death, to compare DM1 patients and healthy controls, and to assess their evolution in DM1 over a 5-year period. METHODS: This retrospective study included genetically confirmed DM1...
August 12, 2018: Annals of Noninvasive Electrocardiology
Niek E G Beurskens, Quint A J Hagdorn, Thomas M Gorter, Rolf M F Berger, Karin M Vermeulen, Joost P van Melle, Tjark E Ebels, George K Lui, Scott R Ceresnak, Frandics P Chan, Tineke P Willems
Cardiac tachyarrhythmias are the leading cause of morbidity and mortality in patients with repaired tetralogy of Fallot (TOF). We evaluated risk factors for sustained ventricular tachyarrhythmia (VT) and atrial tachyarrhythmia (ATA) in these patients. Patients (n = 319) who underwent cardiac magnetic resonance (CMR) imaging at two tertiary centers between 2007 and 2016 were assessed. Potential risk markers, based on history, cardiac magnetic resonance imaging (CMR), electrocardiography (ECG) and echocardiography, were analyzed for prediction of the primary endpoint of VT, and the secondary endpoint of ATA...
August 9, 2018: International Journal of Cardiovascular Imaging
Christopher Reithmann, Michael Fiek, Zeinab Aynur, Michael Ulbrich
BACKGROUND: ECG criteria for identifying an epicardial origin of ventricular tachycardia (VT) have mainly been described for VTs with basal-superior and lateral origin. OBJECTIVE: The aim of this study was to determine ECG criteria for epicardial VTs with anterior origin as a guide for trans-pericardial ablation. RESULTS: Among 22 patients undergoing successful ablation of VTs from the anterior myocardial wall, 14 patients underwent endocardial ablation and 8 patients underwent epicardial ablation...
August 9, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
Krishnan Ganapathy, Dhavapalani Alagappan, Hubert Rajakumar, Baskar Dhanapal, Ganesh Rama Subbu, Lovakanth Nukala, Satgunam Premanand, Krishna Murthy Veerla, Saroj Kumar, Vikram Thaploo
INTRODUCTION: Nonavailability of emergency healthcare services in mountainous, isolated, and sparsely populated regions is a universal problem. In a first of its kind initiative, Tele-emergency Services (TES) was provided in Keylong and Kaza in Himachal Pradesh in Northern India, at an altitude of 3,353 meters with temperatures of -30°C during winter months. METHODS: Existing rooms in regional hospital (Keylong) and community health center (Kaza) were converted into tele-emergency centers by connecting them, to a state-of-the-art emergency department at the Joint Commission International-accredited Apollo Main Hospital at Chennai, 2,925 km away...
July 23, 2018: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
Michael Kostrzewa, Erol Tueluemen, Boris Rudic, Nils Rathmann, Ibrahim Akin, Thomas Henzler, Volker Liebe, Stefan O Schoenberg, Martin Borggrefe, Steffen J Diehl
BACKGROUND: Irreversible electroporation (IRE) is a novel tumor ablative therapy technique, using electric fields to induce apoptosis in target tissues. It is unclear whether these electric pulses of high field strength can cause cardiac damage and/or ablation induced arrhythmias. OBJECTIVE: To systematically evaluate the safety of ECG gated IRE in regards to cardiac side effects. METHODS: In all patients 12-lead electrocardiogram (ECG), signal-averaged ECG (SAECG) recordings were performed before and after IRE and 24-hour Holter recording on the day of the IRE procedure...
July 12, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Kirstine Calloe, Gary L Aistrup, José M Di Diego, Robert J Goodrow, Jacqueline A Treat, Jonathan M Cordeiro
Brugada syndrome (BrS) is an inherited disease associated with ST elevation in the right precordial leads, polymorphic ventricular tachycardia (PVT), and sudden cardiac death in adults. Mutations in the cardiac sodium channel account for a large fraction of BrS cases. BrS manifests in the right ventricle (RV), which led us to examine the biophysical and molecular properties of sodium channel in myocytes isolated from the left (LV) and right ventricle. Patch clamp was used to record sodium current (INa ) in single canine RV and LV epicardial (epi) and endocardial (endo) myocytes...
July 2018: Physiological Reports
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
Yaqub Alwan, Zoran Cvetkovic, Michael Curtis
Differentiating between ventricular tachycardia and ventricular fibrillation in clinical and preclinical research is based on subjective definitions that have yet to be validated using objective criteria. This is partly due to shortcomings in the discrimination ability of current objective approaches, typified by the algorithms that perform cardiac rhythm classification using low-dimensional feature representations of electrocardiogram (ECG) signals. These identify ventricular tachyarrhythmias, but do not discriminate between ventricular tachycardia and ventricular fibrillation...
December 20, 2017: IEEE Transactions on Bio-medical Engineering
Wei Xia, Xiao-Yan Feng
BACKGROUND ST-segment elevation myocardial infarction (STEMI) is an acute and life-threatening disease. Adverse cardiac events (ACEs) are defined as cardiovascular death or worsening congestive heart failure in STEMI patients. The present study investigated the predictive role of fragmented QRS complex (fQRS) in risks of ACEs in STEMI. MATERIAL AND METHODS This study was a retrospective analysis involving patients who underwent percutaneous coronary intervention (PCI) or thrombolysis. STEMI patients were divided into the fQRS group (259 cases) and the non-fQRS group (161 cases)...
July 5, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Shirin Hajeb-Mohammadalipour, Mohsen Ahmadi, Reza Shahghadami, Ki H Chon
We developed an automated approach to differentiate between different types of arrhythmic episodes in electrocardiogram (ECG) signals, because, in real-life scenarios, a software application does not know in advance the type of arrhythmia a patient experiences. Our approach has four main stages: (1) Classification of ventricular fibrillation (VF) versus non-VF segments—including atrial fibrillation (AF), ventricular tachycardia (VT), normal sinus rhythm (NSR), and sinus arrhythmias, such as bigeminy, trigeminy, quadrigeminy, couplet, triplet—using four image-based phase plot features, one frequency domain feature, and the Shannon entropy index...
June 29, 2018: Sensors
Victor Bazan, Francis E Marchlinski
No abstract text is available yet for this article.
June 28, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Lu Zhao Di, Maxime Pichette, Réginald Nadeau, Daniel G Bichet, Frédéric Poulin
BACKGROUND: Fabry disease (FD) is a lysosomal storage disorder caused by an enzymatic deficiency. Conduction abnormalities and bradyarrhythmias are common and can occur prior to the onset of left ventricular (LV) hypertrophy. We aimed to describe the clinical, electrocardiographic and echocardiographic, including left atrial (LA) function, determinants of bradyarrhythmic events in FD. METHODS: We designed a cross-sectional study that includes 53 FD patients (mean age, 45 years; 42% male)...
June 30, 2018: Clinical Cardiology
Hiroaki Kise, Seiko Ohno, Yosuke Kono, Masashi Yoshizawa, Daisuke Harama, Asami Okafuji, Takako Toda, Keiichi Koizumi, Minako Hoshiai, Kanji Sugita, Minoru Horie
A 10-month-old infant experienced cardiac arrest caused by ventricular fibrillation (VF). His electrocardiogram (ECG) at rest was within the normal range. Amiodarone was indispensable due to its refractoriness to defibrillation. After implantable cardioverter defibrillator (ICD) implantation, ICD shock was delivered. ICD recordings documented VF and ventricular tachycardia (VT) triggered by premature ventricular contractions with an extremely short coupling interval (240 ms), which were controlled by verapamil...
June 2018: Journal of Arrhythmia
Takahiro Kamihara, Fumihiko Yasuma, Toyoaki Murohara
Background: Nonsustained ventricular tachycardia (NSVT) is sometimes observed in patients with neuromuscular diseases (NMDs). The aim of this study was to assess the role of NSVT in the survival prognosis of NMD patients. Methods: We retrospectively analyzed the patients with NMDs who had undergone Holter ECG recordings at a single center between February and August 2012. Sixty-eight patients were enrolled in this study. The 5 year follow-up was assessed according to the cumulative event-free rate...
June 2018: Journal of Arrhythmia
Rajesh K Tripathy, Alejandro Zamora-Mendez, José A de la O Serna, Mario R Arrieta Paternina, Juan G Arrieta, Ganesh R Naik
Accurate detection and classification of life-threatening ventricular arrhythmia episodes such as ventricular fibrillation (VF) and rapid ventricular tachycardia (VT) from electrocardiogram (ECG) is a challenging problem for patient monitoring and defibrillation therapy. This paper introduces a novel method for detection and classification of life-threatening ventricular arrhythmia episodes. The ECG signal is decomposed into various oscillatory modes using digital Taylor-Fourier transform (DTFT). The magnitude feature and a novel phase feature namely the phase difference (PD) are evaluated from the mode Taylor-Fourier coefficients of ECG signal...
2018: Frontiers in Physiology
Sung Il Im, Seok Hyun Kim, Bong Joon Kim, Kyoung Im Cho, Hyun Su Kim, Jung Ho Heo
Introduction: Premature ventricular complex (PVCs) detected from long-term ECG recordings have been associated with an increased risk of ischemic stroke. However, there was limited data about the association between high PVCs burdens (>10%) and stroke-like symptoms without a prior diagnosis of stroke or transient ischemic attack in the long-term follow up. Methods: The Kosin University 24-hours holter monitoring, echocardiography, electrocardiogram (ECG) database were reviewed from 2013 to 2015 to identify patients with frequent PVCs (>10%)...
June 2018: IJC Heart & Vasculature
Marta Cvijić, Bor Antolič, Luka Klemen, Igor Zupan
BACKGROUND: Cardiac resynchronization therapy (CRT) has been shown to induce left ventricular reverse remodeling, but little is known about its influence on ventricular repolarization. OBJECTIVE: The purpose of this study was to evaluate changes in ventricular repolarization of native conduction after CRT and its relation to ventricular tachycardia (VT) and ventricular fibrillation (VF) during long-term follow-up. METHODS: We prospectively included 64 patients with heart failure treated with CRT...
June 13, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
David Andreu, Juan Fernández-Armenta, Juan Acosta, Diego Penela, Beatriz Jáuregui, David Soto-Iglesias, Vladimir Syrovnev, Elena Arbelo, José María Tolosana, Antonio Berruezo
BACKGROUND: Previously proposed algorithms to predict the ventricular tachycardia (VT) exit site have been based on diverse left ventricular models, but none of them identify the precise region of origin in the electroanatomic map. Moreover, no electrocardiographic (ECG) algorithm has been tested to predict the region of origin of scar-related VTs in patients with nonischemic cardiomyopathy. OBJECTIVE: The purpose of this study was to validate a simple ECG algorithm to identify the segment of origin (SgO) of VT relative to the 17-segment American Heart Association model in patients with structural heart disease (SHD)...
June 11, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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