Wide complex tachycardia cycle length shorter than the narrow complex tachycardia. What is the mechanism?

abstract：:Recent studies have reported the relation between Torsade de Pointes (TdP) and midmyocardial (M) cell function associated with long QT syndrome. To investigate this relation, we conducted a simulation study with a three-dimensional (3D) heart model incorporating M cells in the anterolateral areas of the model. Paramet...

journal_title：Journal of electrocardiology

authors： Okazaki O,Wei D,Harumi K

更新日期：1998-01-01 00:00:00

abstract：:An 85-year-old male was implanted with a single-chamber permanent pacemaker because of atrial fibrillation with slow ventricular response. The patient had a chronic hearing impairment and decided to buy a hearing aid device. The MyLink device (MyLink, Phonak, Stafa, Switzerland) is a multifrequency FM transmitter/rece...

journal_title：Journal of electrocardiology

authors： Baranchuk AM,Kang J,Shaw C,Witjes R

更新日期：2008-09-01 00:00:00

abstract：:Drugs with diverse structures and from several therapeutic classes are reported to increase the risk that a patient will experience ventricular tachyarrhythmias (e.g., torsades de pointes [TdP]) during drug therapy. This review discusses the use of preclinical assays to assess the risk that a QT-prolonging drug will c...

journal_title：Journal of electrocardiology

authors： Shryock JC,Song Y,Wu L,Fraser H,Belardinelli L

更新日期：2004-01-01 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

abstract：:The goal of the 2007 PhysioNet/Computers in Cardiology Challenge was to try to establish how well it is possible to characterize the location and extent of old myocardial infarcts using electrocardiographic evidence supplemented by anatomical imaging information. A brief overview of the challenge and how different cha...

journal_title：Journal of electrocardiology

authors： Dawoud F,Wagner GS,Moody G,Horácek BM

更新日期：2008-11-01 00:00:00

abstract：:This contribution demonstrates some applications of the most recent release of ECGSIM, an interactive simulation program that enables the user to study the relationship between the electric current sources of the heart and the resulting electrocardiographic signals on the body surface as well as those on the surface o...

journal_title：Journal of electrocardiology

authors： van Oosterom A,Oostendorp TF,van Dam PM

更新日期：2011-09-01 00:00:00

abstract：:Bidirectional tachycardia was observed on Holter tracings recorded from a dog three days after the production of a small freeze lesion on the wall of the left ventricle. A bigeminal rhythm with fixed coupling of ventricular premature contractions was interrupted by a burst of ventricular tachycardia of different morph...

journal_title：Journal of electrocardiology

authors： Klein GJ,Wallace AG,Gallagher JJ

更新日期：1979-01-01 00:00:00

abstract：:Traditional electrocardiographic (ECG) and vectorcardiographic (VCG) criteria for left ventricular enlargement (LVE) understandably emphasize the increased tendency of the maximal electrical forces of ventricular depolarization to be directed toward the left. This tendency is manifested on the ECG by increased amplitu...

journal_title：Journal of electrocardiology

authors： Warner RA,Hill NE

更新日期：1987-10-01 00:00:00

abstract：:To investigate the effects of electrolytes on anterograde conduction via accessory pathways, 12 patients with Wolff-Parkinson-White syndrome received, while in sinus rhythm, intravenous KCl (7 mEq in 200 mL of 0.9% NaCl), MgSO4 (10 mL 20% in 200 mL of 0.9% NaCl), NaCl (0.9%, 200 mL), and procainamide (maximal dose, 10...

journal_title：Journal of electrocardiology

authors： Sideris AM,Galiatsu E,Filippatos GS,Kappos K,Anthopoulos LP

更新日期：1996-01-01 00:00:00

abstract：:The authors have proposed a new four-step screening algorithm to detect asymptomatic coronary artery disease (CAD) in flight school candidates, cadets, and rated flyers of the Unites States Air Force (USAF). In step 1, the USAF Armstrong Laboratory (USAF/AL) risk profile and improved 16-lead high-resolution electrocar...

journal_title：Journal of electrocardiology

authors： Selvester RH,Ahmed J,Tolan GD

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：:The relative contributions of left ventricular structural changes, dysfunction, and subendocardial ischemia in determining electrocardiographic repolarization abnormalities were assessed in 53 patients with chronic, pure aortic regurgitation and no evidence of coronary artery disease. Thirty-six patients with an abnor...

journal_title：Journal of electrocardiology

authors： Badano L,Rubartelli P,Giunta L,Della Rovere F,Miccoli F,Lucatti A

更新日期：1994-07-01 00:00:00

abstract：:This article shows the use of the equivalent surface source model in its application to the genesis of the surface ECG in which the sources are of the double layer type. This model has previously been shown to yield an accurate description of body surface potentials during the QRS interval. Its application to the gene...

journal_title：Journal of electrocardiology

authors： van Oosterom A

更新日期：2001-01-01 00:00:00

abstract：:We studied the influence of exercise level, severity of coronary artery disease (CAD), presence of previous myocardial infarction (MI), anterior or diaphragmatic, on the clinical value of exertional Q wave changes (Delta-Q). We retrospectively evaluated the exercise electrocardiograms of 62 patients without angiograph...

journal_title：Journal of electrocardiology

authors： DeCaprio L,Ascione L,Cuomo S,Vigorito C,Brienza A,Acanfora D,Papa M,Donatiello A,Chieffo C,Rengo F

更新日期：1988-01-01 00:00:00

abstract：:Time course evolution of R, Q, T and ST components of the electrocardiogram during the first 12 hours of an acute myocardial infarction was studied. A comparison between anterior-extensive and anteroseptal wall infarctions (anterior group), and inferior-extensive and inferior wall infarction (inferior group) showed ap...

journal_title：Journal of electrocardiology

authors： Klainman E,Sclarovsky S,Lewin RF,Topaz O,Farbstein H,Pinchas A,Fohoriles L,Agmon J

更新日期：1987-04-01 00:00:00

abstract：BACKGROUND AND AIM:Acute ST-elevation myocardial infarction (STEMI) is associated with fatal and non-fatal ventricular arrhythmic events (VAE). Although primary percutaneous intervention (PCI) is first-line treatment in STEMI, fibrinolytic therapy (FT) is still widely used in many countries. Tp-Te interval; Tp-Te/QT ra...

journal_title：Journal of electrocardiology

authors： Özbek SC,Sökmen E

更新日期：2019-01-01 00:00:00

abstract：BACKGROUND:For the assessment of patients with chest pain, the 12-lead electrocardiogram (ECG) is the initial investigation. Major management decisions are based on the ECG findings, both for attempted coronary artery revascularization and risk stratification. The aim of this study was to determine if the current 6 pre...

journal_title：Journal of electrocardiology

authors： Scott PJ,Navarro C,Stevenson M,Murphy JC,Bennett JR,Owens C,Hamilton A,Manoharan G,Adgey AA

更新日期：2011-07-01 00:00:00

abstract：:We have developed a computer program which simulates a paced cardiac rhythm strip, graphically generating the electrocardiogram (ECG) on a color monitor. Any pacemaker, programmed as desired, dynamically interacts with a preselected intrinsic rhythm. Utilizing symbols prevalent in the pacing industry, this graphics-or...

journal_title：Journal of electrocardiology

authors： Byrd CB,Byrd CL

更新日期：1987-10-01 00:00:00

abstract：:The authors investigated 244 consecutive patients with suspected coronary artery disease by coronary angiography and quantitative left ventriculography to compare the Minnesota Q/QS code (MC) with clinical electrocardiographic (ECG) interpretation. Patients who were suspected to have wall motion abnormalities for reas...

journal_title：Journal of electrocardiology

authors： Heinbuch S,Koenig W,Gehring J

更新日期：1993-04-01 00:00:00

abstract：:For the past several years ECRI Institute has published a list of Top Ten Health Technology Hazards. This list is based on ECRI's extensive research in health technology safety and on data provided to its problemreporting systems. For every year that the Top Ten list has been published, Alarm Hazards have been at or n...

journal_title：Journal of electrocardiology

authors： Keller JP Jr

更新日期：2012-11-01 00:00:00

abstract：:Repetitive nonreentrant ventriculoatrial synchrony during dual-chamber pacing is characterized by long intervals alternating with short intervals. This arrangement activated automatic mode switching in a St Jude dual-chamber pacemaker in which the algorithm requires an atrial sensed event for automatic mode switching ...

journal_title：Journal of electrocardiology

authors： Barold SS,Stroobandt RX,Van Heuverswyn F

更新日期：2012-07-01 00:00:00

abstract：BACKGROUND:Case reports and unblinded studies suggest that human immunodeficiency virus (HIV) disease is associated with QT prolongation and torsade de pointes ventricular tachycardia. Hepatitis C coinfection is common in patients with HIV disease, and cirrhosis is also associated with QT prolongation. We therefore und...

journal_title：Journal of electrocardiology

authors： Nordin C,Kohli A,Beca S,Zaharia V,Grant T,Leider J,Marantz P

更新日期：2006-04-01 00:00:00

abstract：:Hypertrophic cardiomyopathy (HCM) with apical aneurysm (AA) is rare, but has been reported to be associated with refractory ventricular tachycardias (VTs). Majority of such cases had a central isthmus of the reentry circuit on the border zone of AA. In this report, we describe a rare case of the successful epicardial ...

journal_title：Journal of electrocardiology

authors： Nakao M,Watanabe M,Kamada R,Hagiwara H,Takahashi Y,Koya T,Kadosaka T,Koizumi T,Hirose M,Anzai T

更新日期：2020-01-01 00:00:00

abstract：:A low-cost micro-processor combined with a standard 3-channel electrocardiographic recorder was adapted to polar coordinate conversion of Frank orthogonal lead signals and display of the resultant polarcardiogram. The processor also functions as a computer of average transients for the ECG complexes and provides autom...

journal_title：Journal of electrocardiology

authors： Grant ME,Hanson JS

更新日期：1982-01-01 00:00:00

abstract：:We have analyzed the Wilson ventricular gradient in terms of body surface potential maps and of the reduction of such surface patterns to equivalent dipoles or vectors. While the ventricular gradient traditionally was treated as first a scalar, then a vector concept, we found that the three entities (QRS area, T area,...

journal_title：Journal of electrocardiology

authors： Sridharan MR,Horan LG,Hand RC,Johnson JC,Sohi GS,Flowers NC

更新日期：1981-10-01 00:00:00

abstract：BACKGROUND:Correct positioning of peripherally inserted central catheters (PICCs) is essential to avoid complications. We evaluated intravenous electrocardiogram (ECG) recordings during PICC placement to assess the effectiveness of this guidance technique to reduce complications resulting from incorrect catheter placem...

journal_title：Journal of electrocardiology

authors： Smith B,Neuharth RM,Hendrix MA,McDonnall D,Michaels AD

更新日期：2010-05-01 00:00:00

abstract：BACKGROUND:ECG cable interchange can generate erroneous diagnoses. For algorithms detecting ECG cable interchange, high specificity is required to maintain a low total false positive rate because the prevalence of interchange is low. In this study, we propose and evaluate an improved algorithm for automatic detection a...

journal_title：Journal of electrocardiology

authors： Han C,Gregg RE,Feild DQ,Babaeizadeh S

更新日期：2014-11-01 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：BACKGROUND:Accurate measurement of QRS complex duration (QRSd) remains crucial for the selection of patients for cardiac resynchronization therapy (CRT). However, assessment of QRSd on conventional surface electrocardiograms (ECG), especially when performed without computer assistance, may be challenging due to the lim...

journal_title：Journal of electrocardiology

authors： Caro-Codón J,Rey JR,Díaz Cruz J,Martínez Marín LA,García de Veas Marquéz JM,Castrejón S,Martínez Cossiani M,Rodríguez Sotelo L,López-Sendón JL,Merino JL

更新日期：2019-01-01 00:00:00

abstract：:We report a case of 54-year-old man who presented to hospital with severe prolonged retrosternal chest pain of anginal nature. Electrocardiogram taken by his general practitioner showed minimal ST elevation in chest leads V1 and V2; there was also marked right axis deviation of P wave (negative in lead I and aVL) and ...

journal_title：Journal of electrocardiology

authors： Khalil S,Kamal A,Ahmed S

更新日期：2005-10-01 00:00:00