Abstract:
:In recent years, it has become increasingly clear that for an important subset of patients with coronary artery disease, many or all of their ischemic episodes are not accompanied by anginal pain. For these patients, it is desirable to detect these ischemic episodes as periods of ST-segment depression on Holter tapes. In the past, such detection has been difficult because the analysis methods were artifact-sensitive and failed to differentiate ischemic from nonischemic ST-segment changes. This work describes a new ST-segment analysis algorithm that has been added to the existing computer-based Holter analysis system. This system is highly artifact-resistant and has been designed to minimize the loss of processing speed while maintaining extremely high accuracy.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Hubelbank Mdoi
10.1016/s0022-0736(10)80019-6keywords:
subject
Has Abstractpub_date
1992-01-01 00:00:00pages
68-71eissn
0022-0736issn
1532-8430journal_volume
24 Supplpub_type
杂志文章abstract:BACKGROUND:Coronary artery disease and myocardial ischemia cause substantial morbidity and mortality. While ischemia is traditionally diagnosed on the 12-lead electrocardiogram (ECG) by shifts in the ST segment, electrical changes are also produced within the QRS complex during depolarization of ischemic ventricular ti...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2014.09.005
更新日期:2015-01-01 00:00:00
abstract::We recently reported that signal averaged electrocardiograms (SAECG) measurements possess a circadian rhythm and are closely related to heart rate or heart rate variability in healthy volunteers. This study determines the influence of autonomic tone on the filtered QRS (f-QRS) duration from SAECG by using pharmacologi...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(00)80096-5
更新日期:2000-01-01 00:00:00
abstract::The pathophysiological mechanisms of altered transmembrane potentials in diseased human atria were investigated in 20 patients who were divided into group A (normal) and group B (diseased). The electrophysiological data of right atrial tissues measured with glass microelectrodes included maximum diastolic potentials (...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(86)80006-1
更新日期:1986-01-01 00:00:00
abstract::We describe a 75-year-old male patient with two-vessel coronary artery disease, who developed transient left posterior hemiblock (LPH) while undergoing an exercise treadmill test (ETT). The intraventricular conduction abnormality initially had the features of alternating LPH, which evolved to stable LPH prior to dissi...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/s0022-0736(99)90022-5
更新日期:1999-01-01 00:00:00
abstract::15-Year-old man's cardiac event monitor showed an episode of wide complex tachycardia which transitioned into narrow complex tachycardia. The tachycardia cycle length was shorter during wide complex tachycardia compared with narrow complex tachycardia. He underwent electrophysiology study in which an orthodromic atrio...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2020.02.002
更新日期:2020-01-01 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
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2011.05.006
更新日期:2011-09-01 00:00:00
abstract::The authors present a case of trifascicular block: complete right bundle branch block, tachycardia-dependent left anterior hemiblock, and bradycardia-dependent left posterior hemiblock. There is, in addition, a complicating independent AV junctional rhythm that is in most instances not affected by the conducted sinus ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(89)90037-x
更新日期:1989-07-01 00:00:00
abstract::One common variety of exercise-induced artifact is baseline wander resulting from movement, respiration, and poor electrode contact. Although filters can be designed to remove much of this baseline variation, they will distort the low-frequency components of the ECG complex, such as the TP-segment, the PR-segment, and...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(88)90083-0
更新日期:1988-01-01 00:00:00
abstract:OBJECTIVES:To define clinical correlates of low voltage isolated to precordial leads on the surface electrocardiogram (ECG). INTRODUCTION:Low voltage (V) on the ECG is defined as QRS V<5mm in all limb leads and <10mm in all precordial leads. The diagnostic use of ECGs with low voltage isolated to the precordial leads ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2017.04.016
更新日期:2017-01-01 00:00:00
abstract::Vagally mediated paroxysmal atrial fibrillation is typically described to occur in otherwise healthy young-to-middle aged males during periods of high vagal tone. We report a case of cardioinhibitory type neurocardiogenic syncope associated with atrial fibrillation in an elderly female during episodes of nausea. This ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2014.07.007
更新日期:2014-09-01 00:00:00
abstract::His bundle electrograms of 40 patients developing Wenckebach block during atrial pacing and four with spontaneous Wenckebach block above the His were reviewed to determine the frequency of classical Wenckebach periodicity. Thirty patients had 143 Wenckebach cycles that were suitable for analysis. Cycles were evaluated...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(75)80003-3
更新日期:1975-01-01 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::Cardiac gap junctions are responsible for normal conduction properties of the ventricles. Alteration in gap junction distribution (remodeling) in ischemic heart disease is likely to be an important cause of life threatening ventricular arrhythmias. ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1054/jelc.2001.28834
更新日期:2001-01-01 00:00:00
abstract::Pulmonary vein isolation (PVI) using cryoballoon (CB) technique and cavotricuspid isthmus (CTI) ablation using radiofrequency (RF) are established interventions for drug-resistant atrial fibrillation (AF) and typical atrial flutter (AFL). Twelve patients with a mean age of 62 ± 12 years underwent simultaneous delivery...
journal_title:Journal of electrocardiology
pub_type: 临床试验,杂志文章
doi:10.1016/j.jelectrocard.2015.03.013
更新日期:2015-07-01 00:00:00
abstract::This contribution discusses the dominant T wave, a concept providing an overall view on the repolarization currents of the ventricular myocardium. The dominant T wave is a weighted mean of the T waves on the body surface. It can be estimated from the matrix of sampled observed potentials. The timing of its peak reveal...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2004.08.056
更新日期:2004-01-01 00:00:00
abstract:BACKGROUND:Performance of ambulatory electrocardiography (AECG) may provide data useful for counseling patients regarding prognosis and for selecting potential patients for defibrillator implantation, but this practice remains controversial. METHODS:We reviewed clinical and AECG data on 355 patients diagnosed with dil...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2004.09.007
更新日期:2005-01-01 00:00:00
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
pub_type: 杂志文章
doi:10.1016/s0022-0736(98)90308-9
更新日期:1998-01-01 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
pub_type: 杂志文章
doi:10.1016/0022-0736(93)90070-t
更新日期:1993-01-01 00:00:00
abstract::A comparison was performed between the points measured using the Selvester QRS scoring system in 60 electrocardiograms (ECGs) displayed in both a standard format as well as a 4-fold magnified (quad-plot) format. Fifty criteria (a maximum possibility of 31 points) were evaluated in each ECG. The data indicate that in 5...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2006.07.008
更新日期:2007-07-01 00:00:00
abstract::Dilated cardiomyopathy is associated with an increase in transverse plane QRS voltage but a decrease in frontal plane QRS voltage. To study this paradoxical relationship further, electrocardiograms (ECGs) were retrospectively analyzed from five groups of men. Frontal plane QRS voltage was computed as the sum of peak-t...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(85)80032-7
更新日期:1985-01-01 00:00:00
abstract::Body surface potential mapping assessed mean cardiac electrical activation times displayed by isochronal maps in the right ventricle (RV; right ventricle mean activation time [mRV]), anterior septal area (anterior septal area mean activation time [mAS]), and left ventricle (left ventricle mean activation time [mLV]) o...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2005.07.004
更新日期:2006-01-01 00:00:00
abstract::Although solid angle analysis has been considered to be reasonable for explaining the distribution of ST segment deviation following ischemia, it has not been tested fully, especially for ST segment changes in various sites at different lead surfaces. Thus, we investigated the applicability of solid angle theory to th...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(86)80033-4
更新日期:1986-07-01 00:00:00
abstract::Left ventricular systolic function, determined mainly by final infarct size, has a major influence on prognosis after acute myocardial infarction (MI). It was found that infarct size and left ventricular ejection fraction can be predicted using the Selvester QRS-score in patients not receiving reperfusion therapy. We ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1054/jelc.200.20345
更新日期:2000-01-01 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
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2011.03.010
更新日期:2011-07-01 00:00:00
abstract::Benign Early Repolarization is seen most commonly in young males and is thought to arise from left ventricular hypertrophy, vagal tone and hereditary predilection. This case describes an elderly man with Early Repolarization mimicking acute myocardial infarction after a carotid stent procedure. ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2020.05.002
更新日期:2020-01-01 00:00:00
abstract::Five male patients with chronic stable ventricular arrhythmias underwent a placebo controlled ascending dose study with oral cibenzoline, a new type 1 antiarrhythmic drug. Ambulatory ECG (Holter) recordings and electrophysiologic studies were done while on placebo and on the maximum dose of cibenzoline. Drug toxicity,...
journal_title:Journal of electrocardiology
pub_type: 临床试验,杂志文章
doi:10.1016/s0022-0736(84)80020-5
更新日期:1984-01-01 00:00:00
abstract::Body surface potential mapping is superior to 12-lead electrocardiogram in detection of acute and old myocardial infarctions. We examined the capability of the ST-T integral and T wave to detect exercise-induced ischemia in body surface potential mapping. Body surface potential mapping with 123 channels was recorded i...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1054/jelc.2003.50013
更新日期:2003-04-01 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
pub_type: 杂志文章
doi:10.1016/s0022-0736(81)80003-9
更新日期:1981-07-01 00:00:00
abstract:AIMS:The objective of the study was to develop normal limits of the ECG in an apparently healthy population of South Asians living in India. METHODS:Three centres contributed to recording 12 lead ECGs on identical digital electrocardiographs. Apparently healthy volunteers were recruited and ECGs were first transferred...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.jelectrocard.2015.04.013
更新日期:2015-07-01 00:00:00
abstract::Forty-three patients with their first acute inferior wall myocardial infarction (IWMI) were divided into three groups according to the R/Q ratio in standard lead II. This was done to correlate these groups with the characteristic course of electrocardiographic stages. The R/Q ratio was measured on the ninth day of fol...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(88)90105-7
更新日期:1988-11-01 00:00:00