What is ventricular fibrillation undersensing?

abstract：:In order to differentiate the vectorcardiogram (VCG) in high posterior infarction (HPI) from VCGs of normal subjects, right ventricular hypertrophy (RVH) and primary myocardial disease (PMD), the following criteria were presented; cases satisfying the criteria could be diagnosed as high posterior infarction. In cases ...

journal_title：Journal of electrocardiology

authors： Suzuki K,Toyama S

更新日期：1978-04-01 00:00:00

abstract：BACKGROUND:QRS-duration predicts mortality in patients with heart failure and, to a lesser extent, the general population. However, in patients with diabetes, its prognostic significance is unknown. To better understand how QRS-duration relates to mortality among those with diabetes, we explored survival as a function ...

journal_title：Journal of electrocardiology

authors： Singleton MJ,German C,Hari KJ,Saylor G,Herrington DM,Soliman EZ,Freedman BI,Bowden DW,Bhave PD,Yeboah J

更新日期：2020-01-01 00:00:00

abstract：BACKGROUND:Electrocution injury (EI) is a major problem in developing countries. The aim of this study is to investigate the effect of EI on electrocardiographic (ECG) parameters. METHODS:A total of 43 patients hospitalized with diagnosis of EI were prospectively enrolled. Admission ECGs were compared with follow-up E...

journal_title：Journal of electrocardiology

authors： Karataş MB,Onuk T,Güngör B,İpek G,Özcan KS,Kaplangöray M,Çanga Y,Durmuş G,Çakıllı Y,Bolca O

更新日期：2015-09-01 00:00:00

abstract：BACKGROUND:Several studies have documented the prognostic significance of the signal-averaged electrocardiogram (SAECG) both after myocardial infarction and nonischemic cardiomyopathy. However, whether the SAECG can identify patients with implantable cardioverter-defibrillator (ICD) who receive appropriate therapy has ...

journal_title：Journal of electrocardiology

authors： Haghjoo M,Arya A,Parsaie M,Dehghani MR,Sadr-Ameli MA

更新日期：2006-04-01 00:00:00

abstract：:A 57-year-old man without prior history of organic heart disease was admitted with a diagnosis of unstable angina because of chest pain and new electrocardiographic (ECG) changes of global T wave inversion and QT interval prolongation. Left and right heart catheterization with coronary angiography, pulmonary angiograp...

journal_title：Journal of electrocardiology

authors： Lui CY

更新日期：1993-01-01 00:00:00

abstract：:We are reporting a series of 13 out of a total of 16 patients in whom sinus nodal activity was recorded with the use of intra-atrial electrodes, during diagnostic His-bundle electrocardiography investigations. The protocol consisted of the simultaneous monitoring of the following intra-atrial points: high right atrium...

journal_title：Journal of electrocardiology

authors： Hombach V,Gil-Sanchez D,Zanker R,Behrenbeck DW,Tauchert M,Hilger HH

更新日期：1979-10-01 00:00:00

abstract：:There is increasing evidence that regular intense endurance exercise can promote structural and electrical remodeling of the right ventricle (RV). These physiological changes can be profound and are frequently accompanied by ECG changes in the right precordial leads, thereby mimicking features observed in arrhythmogen...

journal_title：Journal of electrocardiology

authors： Claessen G,Brosnan M,La Gerche A,Heidbuchel H

更新日期：2015-05-01 00:00:00

abstract：:Body surface potential mapping was performed in 60 clinical cases and an ideal 0 potential was calculated in each case at 2msec intervals, which corresponds to the potential at infinity. Maximal deviation of the Wilson terminal voltage the ideal potential was 0.14mv on the average. Time course of potential variations ...

journal_title：Journal of electrocardiology

authors： Miyamoto N,Shimizu Y,Nishiyama G,Mashima S,Okamoto Y

更新日期：1995-10-01 00:00:00

abstract：:The JTp interval gained interest as a marker differentiating effects of drugs on cardiac ion channels. For JTp interval, both the beginning - identification of J point and identification of T wave end remains the subject of substantial variability. We aimed to analyze diagnostic and prognostic performance of JTp inter...

journal_title：Journal of electrocardiology

authors： Zareba W,McNitt S,Polonsky S,Couderc JP

更新日期：2017-01-01 00:00:00

abstract：:Many electrocardiographic criteria have been proposed for the differentiation of ventricular extrasystole and supraventricular conduction with aberrancy in atrial fibrillation but the validity of these have not been confirmed by intracardiac studies. We recorded His bundle electrograms in nineteen patients (eleven men...

journal_title：Journal of electrocardiology

authors： Gulamhusein S,Yee R,Ko PT,Klein GJ

更新日期：1985-01-01 00:00:00

abstract：:Extra AV nodal Wenckebach periodicity was diagnosed in seven patients. The most frequent form of this conduction abnormality was an exit block. The underlying block was localized in the sinoatrial junction and in the atria in two patients; the AV junction and the ventricle were the site of the Wenckebach periodicity i...

journal_title：Journal of electrocardiology

authors： Schweitzer P,Choudhry M,Kunkes SH,Ress R,Mark H

更新日期：1981-07-01 00:00:00

abstract：:Ventricular fibrillation (VF) is the most common arrhythmia leading to sudden cardiac death, but in rare cases VF can manifest as a syncope, provided that it will self-terminate. We present a case of a 45-year old female with a history of unexplained syncopal episodes despite exhaustive diagnostics. Implantable loop r...

journal_title：Journal of electrocardiology

authors： Przyżycka P,Kałowski M,Poddębska I,Kaczmarek K,Ptaszyński P,Wranicz JK,Cygankiewicz I

更新日期：2018-01-01 00:00:00

abstract：:Atrioventricular node reentry tachycardia is an incompletely understood substrate for supraventricular tachycardia. Although there is agreement that the mechanism involves functionally separate fast and slow AV node pathways, which are somewhat anatomically discrete, the anatomical basis for the reentrant circuit is n...

journal_title：Journal of electrocardiology

authors： Van Hare GF

更新日期：2008-11-01 00:00:00

abstract：AIM:LBBB in heart failure patients has prognostic significance. Subtypes of LBBB (concordant and discordant) have not been considered when considering management. The aim of this study is to explore the clinical difference between the two subtypes. METHODS:216 patients with LBBB were included and categorized into conc...

journal_title：Journal of electrocardiology

authors： Khalil J,Bernard AS,Maurice K,Zaheer Y,Marwan R,Abdallah R,Samir A,Hadi S

更新日期：2016-01-01 00:00:00

abstract：:Inferior paraseptal accessory pathways (APs) have a wide distribution and prediction of AP location before radiofrequency ablation is very important in such pathways. We aimed to estimate successful ablation site based on electrocardiogram in 137 patients (mean age: 25.8±9.0; 126 males) with single manifest inferior p...

journal_title：Journal of electrocardiology

authors： Kabul HK,Ulus T,Barcın C,Unlu M,Samedli S,Kose S

更新日期：2016-03-01 00:00:00

abstract：:The long-term goal of electrocardiography is to relate electric potentials on the body surface with activities in the heart. Many previously reported studies have focused on direct links between heart and body surface potentials. The goals of this study were first to validate computational methods of determining volum...

journal_title：Journal of electrocardiology

authors： Ni Q,MacLeod RS,Punske BB,Taccardi B

更新日期：2000-01-01 00:00:00

abstract：BACKGROUND AND PURPOSE:Descriptions of the significance of ST segment or QRS abnormalities in myocarditis are limited because documentation of the diagnosis has previously required myocardial biopsy. Late gadolinium enhancement (LGE) and T2 weighted imaging in the midventricular wall on cardiac magnetic resonance imagi...

journal_title：Journal of electrocardiology

authors： Jhamnani S,Fuisz A,Lindsay J

更新日期：2014-11-01 00:00:00

abstract：BACKGROUND:There is a controversy regarding the association between QRS width and ventricular arrhythmias (VAs). We hypothesized that predictive value of the QRS width could be improved if QRS width were considered in the context of the sum magnitude of the absolute QRST integral in 3 orthogonal leads sum absolute QRST...

journal_title：Journal of electrocardiology

authors： Tereshchenko LG,Cheng A,Fetics BJ,Marine JE,Spragg DD,Sinha S,Calkins H,Tomaselli GF,Berger RD

更新日期：2010-11-01 00:00:00

abstract：UNLABELLED:By definition, the electrocardiographic (ECG) patterns of left bundle-branch block (LBBB) represent distinctive changes in duration and shape of the QRS complex caused by intraventricular conduction delay in the left ventricle (LV) due to structural abnormalities in the His-Purkinje conduction system and/or ...

journal_title：Journal of electrocardiology

authors： Bacharova L,Szathmary V,Mateasik A

更新日期：2011-11-01 00:00:00

abstract：:Morphology of ventricular ectopic complexes was examined in 1,746 ECGs of 149 patients with permanent ventricular pacemakers. In 20 of 80 patients (25%) the morphology of ventricular ectopic complexes was similar to that of the paced complex. This resulted in a ventricular couplet where the spontaneous premature compl...

journal_title：Journal of electrocardiology

authors： Surawicz B,Kuo CS,Reddy CP

更新日期：1980-04-01 00:00:00

abstract：:Isolated occlusion of the septal perforating branch of the left anterior descending coronary artery is extremely rare. As a result, little is known about its electrocardiographic manifestations compared with those of an anteroseptal myocardial infarction. We present the case of an isolated septal myocardial infarction...

journal_title：Journal of electrocardiology

authors： Tomcsanyi J,Bozsik B,Zsoldos A,Simor T

更新日期：2012-05-01 00:00:00

abstract：:Heart muscle diseases are traditionally classified according to their peculiar pathophysiologic features such as "dilated," "hypertrophic," "restrictive," and "arrhythmogenic right ventricular" cardiomyopathy. The extraordinary advances accomplished in the last two decades in molecular genetics have allowed the identi...

journal_title：Journal of electrocardiology

authors： Corrado D,Basso C,Thiene G

更新日期：2005-10-01 00:00:00

abstract：:We present a case of an anterior ST-segment elevation acute coronary syndrome secondary to occlusion of a non-dominant right coronary artery. Usually, an anterior ST-segment elevation corresponds to a left anterior descending artery occlusion; however, in rare cases it can be secondary to a non-dominant right coronary...

journal_title：Journal of electrocardiology

authors： Cecconi A,Gonzalez Bartol E,Bastante T,Jimenez-Borreguero LJ,Alfonso F

更新日期：2018-01-01 00:00:00

abstract：:The importance of plasma electrolytes and pH levels in determining heart rate is not yet well grounded. Hemodynamic and biochemical data were collected during 8 purely diffusive hemodialysis, which allowed changes in extracellular fluid to be achieved without eliciting notable changes in the autonomic control of heart...

journal_title：Journal of electrocardiology

authors： Severi S,Cavalcanti S,Mancini E,Santoro A

更新日期：2002-04-01 00:00:00

abstract：:Patients with paroxysmal atrial fibrillation (AF) have greater overall P wave magnitude than control subjects, but the temporal localization of the increased energy is unknown. P wave spectral turbulence has not been investigated in such patients, and the optimum methodology for studying P wave signals has not been de...

journal_title：Journal of electrocardiology

authors： Stafford PJ,Vincent R

更新日期：1997-04-01 00:00:00

abstract：:Placement of the precordial electrodes for recording a 12-lead electrocardiogram (ECG) is subject to variation. Previous research has shown that displacement, especially in the longitudinal direction, can lead to changes in diagnosis. In practice, both the displacement and the effects of displacement on an individual ...

journal_title：Journal of electrocardiology

authors： Schijvenaars RJ,Kors JA,van Herpen G,van Bemmel JH

更新日期：1996-01-01 00:00:00

abstract：:Considerable efforts have been invested recently to improve electrocardiographic (ECG) classification accuracy for left ventricular hypertrophy (LVH). This study examines how LVH classification accuracy is influenced by (1) the selection of an echocardiographic standard for LVH, (2) LVH severity level in the test grou...

journal_title：Journal of electrocardiology

authors： Rautaharju PM,Zhou SH,Park LP

更新日期：1996-01-01 00:00:00

abstract：:Normal pacemaker and defibrillator function can occasionally mimic device malfunction. A thorough understanding of timing cycles and familiarity with company-specific pacing algorithms can often avoid unnecessary confusion. ...

journal_title：Journal of electrocardiology

authors： Ortman M

更新日期：2012-11-01 00:00:00

abstract：:Ventricular tachycardia arising from a healed myocardial infarction scar continues to be a significant cause of morbidity and mortality. Drug therapy has been inadequate to meet this challenge, and implantable devices are limited by expense and technical problems. We have proposed the use of gene therapy for cardiac a...

journal_title：Journal of electrocardiology

authors： Donahue JK,Sasano T,Kelemen K

更新日期：2007-11-01 00:00:00

abstract：:In order to examine the clinical usefulness of the vulnerability map, body surface mapping was performed in ten normal subjects and 32 patients with CAD using dipyridamole infusion to induce ventricular arrhythmias. A vulnerability map and the vulnerability index (VI) proposed by Urie et al. were constructed from QRS ...

journal_title：Journal of electrocardiology

authors： Yasumura S,Kubota I,Ikeda K,Tsuiki K,Yasui S

更新日期：1987-04-01 00:00:00