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 groups, and (3) the adjustment of LVH criteria for obesity and age. Using data obtained from large, community-based populations, this study explores prospects for improving ECG models for LVH classification and examines some of the general characteristics of newer ECG models for estimating left ventricular mass (LVM) on a continuous scale. The results indicate that the apparent ECG classification accuracy for LVH is substantially influenced by echocardiographic standards and criteria for LVH, LVH severity level, and selection criteria for test populations, and these differences explain some of the often substantial differences in test results from clinical versus community-based evaluation studies. The low reproducibility of echocardiographic LVM as the standard is a limiting factor in attempts to improve ECG criteria for LVH and LVM prediction models. Adjustment of ECG amplitudes to anthropometric factors that simultaneously influence LVM may result in confounding effects and may lead to the development of inappropriate models. The performance of ECG models for LVM prediction improved substantially by the inclusion of body weight as a covariate with ECG variables. The addition of standing height and various covariates reflecting obesity did not improve LVM prediction accuracy. Compared to the older LVM prediction models of the Novacode ECG program, the correlation between echocardiographic and ECG estimates of LVM increased sufficiently (from 0.33 to 0.54 in women and from 0.46 to 0.62 in men) to suggest that these improved ECG models are suitable for monitoring LVH progression/ regression in study groups participating in hypertension intervention trials.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Rautaharju PM,Zhou SH,Park LPdoi
10.1016/s0022-0736(96)80073-2subject
Has Abstractpub_date
1996-01-01 00:00:00pages
261-9eissn
0022-0736issn
1532-8430journal_volume
29 Supplpub_type
杂志文章abstract::Sudden cardiac death occurs as a result of a complex interplay of changes in myocardial substrate, imbalance of autonomic regulation of the heart, and myocardial vulnerability. Noninvasive electrocardiology serves as a comprehensive tool for investigating factors representing mechanistic pathways leading to cardiac ev...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2003.09.022
更新日期:2003-01-01 00:00:00
abstract::The de Winter electrocardiogram (ECG) pattern may signify proximal left anterior descending artery (LAD) occlusion and was suggested to be managed as ST-segment elevation myocardial infarction (STEMI) equivalent for urgent angiography and reperfusion therapy. However, cardiac catheter laboratory is not readily or time...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2019.06.010
更新日期:2019-01-01 00:00:00
abstract:INTRODUCTION:The right ventricular myocardial infarction (RVMI) has traditionally been mainly related to inferior wall ST elevation myocardial infarction (STEMI). This study assessed the RVMI electrocardiographic (ECG-RVMI) signs in relationship to ECG-based STEMI localization and to the infarct related artery in patie...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2016.08.001
更新日期:2016-01-01 00:00:00
abstract:BACKGROUND:It has been reported in the literature that the increase in body temperature shortens QT interval on electrocardiogram through heart rate modulation. However, the effects of fever on ventricular repolarization are not clearly known. This study elaborates on QT interval of isolated fever, corrected QT (cQT), ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2020.11.016
更新日期:2020-12-03 00:00:00
abstract::We found significant variation within each computer and cardiologist method for measurement of the ECG waveform intervals. Comparison between methods revealed that the HP system had a smaller variability than the MAC or the cardiologist, and that the MAC had a smaller variability than the cardiologist. No variability ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(07)80110-5
更新日期:1989-01-01 00:00:00
abstract:PURPOSE:We conducted a systematic review and meta-analysis of randomized and observational studies to evaluate the associations between QRS duration (QRSd) at baseline or in follow-up and outcomes with cardiac resynchronization therapy (CRT). METHODS:We searched online databases to December 2010 and included 6 randomi...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.jelectrocard.2012.12.003
更新日期:2013-03-01 00:00:00
abstract::The purpose of the present study is to assess QT-interval measurements from the EASI 12-lead electrocardiogram (ECG) as compared with the standard 12-lead ECG. The QT interval was automatically determined in simultaneously recorded standard and EASI 12-lead ECGs, using a validated wavelet-based delineator. The agreeme...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2006.08.089
更新日期:2007-04-01 00:00:00
abstract:BACKGROUND:The appearance of a discrete upward deflection of the ST segment, termed the ST hump sign during exercise testing has been associated with resting hypertension and exaggerated blood pressure response to exercise. OBJECTIVE:We investigated the correlation between the presence of hump sign during exercise tes...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2009.09.001
更新日期:2010-03-01 00:00:00
abstract:BACKGROUND:An association between paroxysmal supraventricular tachycardias (PSVT) and elevated cardiac troponin I (cTnI) has been reported in small studies, even in the absence of significant coronary artery or structural heart disease. We sought to explore the prognostic significance of elevated cTnI among patients pr...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2020.09.001
更新日期:2020-01-01 00:00:00
abstract::The accuracy of a real-time analysis Holter system (Oxford Medilog 4500) in detecting ventricular and supraventricular arrhythmias was evaluated. Hand-counted data from randomly selected hours of 152 ECG monitorings of 152 patients were used as the control standard. Accuracy of the system was evaluated on 606 hours fo...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(90)90119-m
更新日期:1990-10-01 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
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2008.06.016
更新日期:2008-11-01 00:00:00
abstract::The long QT syndrome is an inherited arrhythmogenic disease characterized by prolongation of QT interval, syncope, and sudden cardiac death because of ventricular tachycardia, mainly in the form of Torsades de Pointes. We present an unusual case of prolonged QT interval and cardiac arrest caused by Torsades de Pointes...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2010.12.001
更新日期:2011-05-01 00:00:00
abstract::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 un...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2017.01.012
更新日期:2017-01-01 00:00:00
abstract::A 63 year old man with angina pectoris was found to have frequent extrasystoles separated by odd as well as even numbers of conducted sinus beats. Analysis of 935 conducted sinus beats showed that premature ventricular beats without interpolation were separated by odd numbers of conducted sinus beats in 117 sequences ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(82)80033-2
更新日期:1982-01-01 00:00:00
abstract::Catheter ablation procedures are performed by highly trained and experienced cardiology subspecialists. Yet the massive amount of data produced during these procedures creates a data overload problem that can impede the performance of even the best practitioners. This may be evidenced by (1) overlooking important sign...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(96)80063-x
更新日期:1996-01-01 00:00:00
abstract::In treating atrial fibrillation (AF) the goal of ventricular rate reduction is still not determined. An animal model of AF was developed in which the relationship between ventricular rate and the parameters of cardiac function in AF can be studied. To simulate AF, complete heart block was chemically produced on open-c...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(05)80100-1
更新日期:1994-04-01 00:00:00
abstract:PURPOSE:Recent research has established that a tall R-wave in V1 indicates lateral wall involvement in non-anterior wall myocardial infarction (MI). The objective of this study was to assess the value of the admission electrocardiogram (ECG) to predict R-waves and consequently lateral wall damage in the late phase of n...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2015.02.005
更新日期:2015-07-01 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
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2015.03.001
更新日期:2015-05-01 00:00:00
abstract:BACKGROUND:Atrial fibrillation (AF) and ventricular arrhythmias (VAs) are associated with increased morbidity and mortality. However, data are lacking concerning the association of AF and VAs. This study aimed to clarify the association between AF and VAs and to investigate the effect of amiodarone on the incidence of ...
journal_title:Journal of electrocardiology
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1016/j.jelectrocard.2018.10.083
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND:Atrial fibrillation occurs in 20% to 40% of patients post cardiac surgery. Prophylactic amiodarone decreases the incidence of atrial fibrillation, especially in those not taking β-blockers. Studies, however, vary in dosage, duration of treatment, and route of administration. Limited studies evaluating short ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jelectrocard.2012.07.005
更新日期:2012-11-01 00:00:00
abstract::In a patient with Wolff-Parkinson-White syndrome and an inferior-posterior bypass tract, transient restoration of normal conduction occurred during an attack of angina. The ECG pattern of inferior posterior ischemia was present when the conduction was normal. Thallium scintigraphy showed a reversible posterolateral pe...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(90)90165-x
更新日期:1990-07-01 00:00:00
abstract::The electrocardiographic criteria for isolated left anterior fascicular block are reviewed and illustrated. Left anterior fascicular block decreases the voltage in the chest leads and increases the voltage in the limb leads. The usual voltage criteria of left ventricular hypertrophy must be modified appropriately. Cha...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(83)80024-7
更新日期:1983-04-01 00:00:00
abstract::The objective of this study is to assess the performance of patient-specific segment-specific (PSSS) synthesis in QRST complexes using CAVIAR, a new method of the serial comparison for electrocardiograms and vectorcardiograms. A collection of 250 multi-lead recordings from the Common Standards for Quantitative Electro...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(92)90080-j
更新日期:1992-01-01 00:00:00
abstract::Electrocardiographic estimation of myocardial injury has, in some studies, correlated poorly with the extent of nuclear perfusion defects at rest and with changes in the left ventricular ejection fraction after acute reperfusion therapy. The authors investigated 16 patients with fatty acid scintigraphy and with the Se...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(05)80256-0
更新日期:1995-07-01 00:00:00
abstract::In order to differentiate posterior (posterolateral) myocardial infarction (PMI) from the anterior shift of the QRS loop in "normal variant" cases using a vectorcardiogram, the T loop as well as the QRS loop in the transverse plane (TP) were analyzed in 34 elderly Japanese males with angiographically-proven PMI and in...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(86)80017-6
更新日期:1986-04-01 00:00:00
abstract:BACKGROUND:We aimed to evaluate possible association between QRS duration (QRSD), R wave peak time (RWPT), and coronary artery disease severity identified using the SYNTAX score (SS) in patients with unstable angina pectoris (USAP) or non-ST segment elevation myocardial infarction (NSTEMI). METHOD:A total of 176 USAP/...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2017.09.009
更新日期:2018-01-01 00:00:00
abstract::Intracellular and extracellular recording techniques were used to study triggered activity in tissues isolated from the inferior right atrium of the dog. In the presence of norepinephrine (greater than 10(-7) M) single stimuli or short rapid pacing elicited action potentials with delayed after-depolarizations, leading...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(87)90005-7
更新日期:1987-01-01 00:00:00
abstract::Body surface isopotential maps around early ventricular activation were investigated in 30 normal subjects by the use of the authors' signal-averaged body surface mapping system. The number of beats averaged was 96-154 (mean, 127). Two distinct patterns were recognized in the appearance of a maximum at the onset of ve...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(91)90025-h
更新日期:1991-07-01 00:00:00
abstract::Sudden cardiac death (SCD) in hypertrophic cardiomyopathy (HCM) is caused by ventricular tachyarrhythmia that can be effectively treated by implantable cardioverter defibrillator (ICD) therapy. We report of a 28-year-old man with HCM and a dual chamber ICD, originally implanted for primary prevention of SCD, (programm...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2017.06.005
更新日期:2017-01-01 00:00:00
abstract::A 65-year old male originally presented with repetitive ventricular bigeminal sequences demonstrating progressive prolongation of successive coupling intervals suggesting Wenckeback-type exit block. An even number distribution of conducted beats always intervened between bigeminal sequences. Subsequent analysis proved...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(78)80146-0
更新日期:1978-10-01 00:00:00