Abstract:
:Left ventricular (LV) dysfunction after myocardial infarction is associated with higher risk of serious ventricular arrhythmias and sudden death. We suspected that heterogeneity in ventricular repolarization contributes to these arrhythmias. To quantify this heterogeneity, we measured the recovery time (the interval between QRS onset and the time of maximum dV/dt in the ST-T segment) using an 87-lead body surface mapping electrocardiogram and estimated recovery time dispersion (the difference between maximum recovery time and minimum recovery time) in each lead. Differences between 110 patients with previous myocardial infarction and 31 healthy controls were compared. Recovery time dispersion [medians (25th, 75th percentiles)] was greatest in patients with a dilated LV [169 ms (154, 201) vs. 155 ms (137, 172), P <.005], impaired ejection fraction [173 ms (155, 202) vs. 152 ms (138, 165), P <.0005] and LV dyskinesis [175 ms (159, 201) vs. 155 ms (137, 161), P <.0005]. This study suggests that LV dysfunction associated with myocardial infarction leads to heterogeneous ventricular repolarization and may provide the electrical substrate for ventricular arrhythmias.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Mine T,Shimizu H,Inazumi T,Iwasaki Tdoi
10.1054/jelc.2003.50005keywords:
subject
Has Abstractpub_date
2003-01-01 00:00:00pages
1-9issue
1eissn
0022-0736issn
1532-8430pii
S0022073602304564journal_volume
36pub_type
杂志文章abstract:BACKGROUND:Cardiac magnetic resonance (CMR) is currently considered the reference standard for in vivo assessment of myocardial infarction (MI). There is, however, no international consensus on how MI quantification from CMR should be performed. The aim of this study was to test how previously published manual quantifi...
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更新日期:2011-09-01 00:00:00
abstract::QT and RR intervals' fluctuations are implicated in the development of malignant arrhythmias. Recent research has quantified repolarization lability using stochastic and linear methods. However, QT-RR intervals are nonlinearly coupled. To this end, QT and RR intervals were extracted from twenty four patients with acut...
journal_title:Journal of electrocardiology
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更新日期:1988-04-01 00:00:00
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pub_type: 临床试验,杂志文章
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更新日期:2015-07-01 00:00:00
abstract:UNLABELLED:PROBLEM PRESENTED: A novel study of catheter ablation of the right pulmonary artery ganglionated plexi (RPA GP) to reduce atrial fibrillation (AF) originating in the pulmonary veins (PVs) is presented. STUDIES UNDERTAKEN:In 20 dogs, atrial effective refractory periods (AERPs), PVERP, and the dispersion of A...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
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journal_title:Journal of electrocardiology
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1054/jelc.2002.37156
更新日期:2002-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2014-11-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
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更新日期:2015-03-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
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更新日期:1976-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2012.03.005
更新日期:2012-07-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2011.02.003
更新日期:2011-11-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1054/jelc.2002.29943
更新日期:2002-01-01 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::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:BACKGROUND:While J-waves were observed in healthy populations, variations in their reported incidence may be partly explicable by the ECG filter setting. METHODS:We obtained resting 12-lead ECG recordings in 665 consecutive patients and enrolled 112 (56 men, 56 women, mean age 59.3±16.1years) who manifested J-waves on...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2013.10.001
更新日期:2014-01-01 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
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2012.04.003
更新日期:2012-07-01 00:00:00
abstract::The Electrocardiogram has extensively been used for evaluation and triage of patients with acute chest pain. The clinician admitting a patient with ST elevation acute myocardial infarction should be able to estimate the size and location of the ischemic area at risk, how much of the ischemic myocardium has already und...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2005.01.003
更新日期:2005-04-01 00:00:00
abstract::A case of concealed ventricular bigeminy is reported in which the number of sinus QRS complexes intervening between two successive noninterpolated extrasystoles was always uneven. Coupling intervals of manifest extrasystoles to the preceding sinus QRS complexes were almost fixed and much longer than sinus QT intervals...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
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更新日期:1996-10-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
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更新日期:1979-10-01 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
pub_type: 杂志文章
doi:10.1016/s0022-0736(87)80100-0
更新日期:1987-04-01 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:BACKGROUND:Some patients with ongoing heart failure symptoms after treatment with cardiac resynchronization therapy (CRT) demonstrate QRS prolongation during exercise. We investigated whether the optimal CRT pacing configuration changes during dobutamine stress. METHODS:Seven patients undergoing CRT implantation under...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2020.08.012
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Conflicting results have been reported on the predictive value of the electrocardiographic left ventricular hypertrophy (LVH) in the general population. This meta-analysis sought to compare the predictive value of different electrocardiographic criteria of LVH in the general population. METHODS:We comprehen...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2020.07.001
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND AND PURPOSE:ECG screening of young athletes for risk of sudden cardiac death has grown in popularity throughout the world. The purpose of this study is to assess the technical error rate of ECGs acquired by appropriately trained community volunteers compared to that reported in the literature utilizing train...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2015.02.007
更新日期:2015-05-01 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
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2015.08.031
更新日期:2016-01-01 00:00:00
abstract::New developments in instrumentation, in clinical application, as well as in data analysis and visualization have provided new momentum to magnetocardiography (MCG). On one hand robust, easy to use and budget-priced MCG-systems entered the market and are applied to a multi-centred clinical study. On the other hand high...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2004.08.035
更新日期:2004-01-01 00:00:00
abstract::Extensive experience has been obtained with Medtronic pacemakers, in Glasgow where over 400 patients have received their primary implant. In this review, which covers a period of seven and a half years ending December 31, 1973, the technical reliability of electrode-leads is considered in terms of failed implant lifet...
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更新日期:1975-01-01 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 ...
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pub_type: 杂志文章
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更新日期:1989-01-01 00:00:00