Abstract：
:Voltage-sensitive dyes and high resolution optical mapping were used to analyze the characteristics of spiral waves of excitation in isolated ventricular myocardium. In addition, analytical techniques, which have been previously used in the study of the characteristics of spiral waves in chemical reactions, were applied to determine the voltage structure of the center of the rotating activity (ie, the core). During stable spiral wave activity local activation occurs in a periodic fashion (ie, 1:1 stimulus: response activation ratio) throughout the preparation, except at the core, which is a small elongated area where the activity is of low voltage and the activation ratio is 1:0. The voltage amplitude increases gradually from the center of the core to the periphery. In some cases, however, regular activation patterns at the periphery may coexist with irregular local activation patterns near the core. Such a spatiotemporal irregularity is attended by variations in the core size and shape and results from changes in the core position. The authors conclude that functionally determined reentrant activity in the heart may be the result of spiral waves of propagation and that local spatiotemporal irregularities in the activation pattern are the result of changes in the core position.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Davidenko JM,Pertsov AM,Salomonsz R,Baxter WP,Jalife Jdoi
10.1016/s0022-0736(10)80029-9keywords:
subject
Has Abstractpub_date
1992-01-01 00:00:00pages
113-22eissn
0022-0736issn
1532-8430journal_volume
24 Supplpub_type
杂志文章abstract：:The origin of ST depression in ischemia remains poorly understood. The accepted source is of intracellular current flowing between the ischemic and non ischaemic muscle both in systole and diastole such that the AC recorded electrocardiogram shows ST elevation over the ischemic area. The difficulty comes with partial ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2003.09.002
更新日期：2003-01-01 00:00:00
abstract：OBJECTIVE:The aim of our study was to investigate the value of the transtelephonic electrocardiogram (TTECG) monitoring system during a "blanking period" of 3 months after ablation by analyzing the frequency of atrial arrhythmias episodes and the relationship between the frequency of atrial fibrillation (AF) attacks an...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2010.06.007
更新日期：2010-11-01 00:00:00
abstract：:The electrocardiographic transient display of left ventricular hypertrophy (LVH), during rapid heart rates, in the setting of sinus/supraventricular tachycardias and atrial fibrillation, is illustrated via 3 case reports. This common occurrence is expressed by an increase in the S-waves in leads V2-V5, during tachycar...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2021.01.001
更新日期：2021-01-09 00:00:00
abstract：:An extremely rare case of intermittent ventricular parasystolic bigeminy is presented, in which coexisting reentrant ventricular extrasystoles of sinus origin, showing mainly trigeminy, and those of ventricular parasystolic origin, showing a close coupling to the ventricular parasystolic beat, are demonstrated. Such a...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/0022-0736(90)90139-s
更新日期：1990-04-01 00:00:00
abstract：:The Brugada syndrome (BS) accounts for approximately 20% of cases of sudden cardiac death in patients with structurally normal hearts. The electrophysiologic basis for ST-segment elevation in the precordial electrocardiogram (ECG) leads that characterize the Brugada phenotype and its strong linkage to ventricular tach...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2010.07.008
更新日期：2010-09-01 00:00:00
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
pub_type： 杂志文章
doi：10.1016/s0022-0736(78)80107-1
更新日期：1978-04-01 00:00:00
abstract：OBJECTIVE:Assess effect of right ventricular pacing (RVP) on left ventricular (LV) activation in heart failure patients with left bundle branch block (LBBB). BACKGROUND:LV activation during RVP is regarded as similar to LBBB; hence novel CRT algorithms may avoid RVP by adopting "fusion" pacing with intrinsic RBB-media...
journal_title：Journal of electrocardiology
pub_type： 临床试验,杂志文章
doi：10.1016/j.jelectrocard.2014.09.002
更新日期：2015-01-01 00:00:00
abstract：:Hypertrophic cardiomyopathy (HCM) have been reported to display impaired heart rate variability, although little is known regarding its prognostic value. By using fast Fourier transformation of 24-hour Holter recordings in 73 HCM patients at a stable clinical condition, we computed 4 spectral components: very low freq...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2003.08.005
更新日期：2003-10-01 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...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(75)80030-6
更新日期：1975-01-01 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
pub_type： 杂志文章,评审
doi：10.1016/j.jelectrocard.2005.06.101
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
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2018.07.017
更新日期：2018-01-01 00:00:00
abstract：:Until recently, ECG accuracy in localizing acute myocardial infarction (AMI) could be assessed only by comparing the ECGs with autopsy findings. This approach, however, preselected patients, including only those who died. It is possible that this postmortem group of patients would be different from the whole populatio...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(82)80014-9
更新日期：1982-04-01 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
doi：10.1016/j.jelectrocard.2010.03.007
更新日期：2010-07-01 00:00:00
abstract：:The behavior of the sino-atrial mechanism in isorhythmic dissociation (IRD) was studied in 21 patients, nine with spontaneous IRD and 12 with artificially pacemaker-induced IRD following electrode placement for heart block. Successive P-P, R-R and P-R intervals and blood pressure (BP) fluctuations were determined and ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(77)80052-6
更新日期：1977-04-01 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：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
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2014.08.006
更新日期：2014-11-01 00:00:00
abstract：:A common basis of orthogonal waveform functions was derived from 128 lead body surface potential maps of 405 subjects. Twelve such orthogonal functions or frames were adequate for reconstruction of original ECGs from the beginning of QRS to the end of T. A larger number of frames (18) was required when basis functions...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(85)80016-9
更新日期：1985-10-01 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
pub_type： 杂志文章
doi：10.1016/s0022-0736(96)80073-2
更新日期：1996-01-01 00:00:00
abstract：:High-resolution (HI-RES) ECG analysis software and a new front end have been designed for a standard 12-lead ECG cart, MAC-12. The front end acquires orthogonal ECG at 1,000 samples/sec and 1.2 microV/bit and transmits to the cart. The HI-RES software delineates QRS complexes and correlates them with a template in fre...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/0022-0736(88)90062-3
更新日期：1988-01-01 00:00:00
abstract：OBJECTIVE:This study was undertaken to evaluate the nature and onset of changes in the QRS complex in the offspring of patients with diabetes mellitus (DM) and metabolic syndrome (MetS). METHODS AND METHODS:A total of 529 subjects, divided into 5 groups, were included in the study: (i) group DM (n = 92), patients with...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2012.02.004
更新日期：2012-05-01 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：:The authors present an original method for the discrimination of patients prone to ventricular tachycardia. The wavelet transform, which is a new time-scale technique suitable for transient signal detection, was applied to bipolar unfiltered X, Y, Z signal-averaged electrocardiograms in 20 postinfarction patients with...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/0022-0736(93)90052-f
更新日期：1993-10-01 00:00:00
abstract：:To assess the significance of recovery time (RT) dispersion measured by body surface mapping, we investigated body surface RT isochrone maps of 40 patients with anterior old myocardial infarction (OMI), 40 patients with dilated cardiomyopathy (DCM), and 40 controls. Among the OMI and DCM groups, 20 patients per group ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1054/jelc.2001.23358
更新日期：2001-04-01 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：:Brugada phenocopies are clinical entities characterized by electrocardiographic patterns that are identical to true Brugada syndrome, but are elicited by a number of clinical circumstances. ECG normalizes upon resolution of underlying condition, family history of arrhythmic syncope or ventricular arrhythmias is strict...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2019.04.003
更新日期：2019-01-01 00:00:00
abstract：:Computer analysis of electrocardiograms (ECGs) provides a large amount of ECG measurement data, which may be used for diagnostic classification and storage in ECG databases. Until now, neither error limits for ECG measurements have been specified nor has their influence on diagnostic statements been systematically inv...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(96)80022-7
更新日期：1996-01-01 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：:In the last 10 years the molecular substrate of a diversity of primary electrical diseases has been unraveled. Disease-causing mutations in ion-channel genes have been identified and have challenged clinical and basic electrophysiologists to mechanistically link the observed genetic aberrancies to the phenotype. Indee...
journal_title：Journal of electrocardiology
pub_type： 杂志文章,评审
doi：10.1016/j.jelectrocard.2005.06.103
更新日期：2005-10-01 00:00:00
abstract：BACKGROUND:In a minority of the patients presenting with ST-segment elevation (STE) myocardial infarction (MI), electrocardiogram (ECG) may show a balanced STE in both anterior and inferior lead groups and may cause diagnostic confusion about involved myocardial territory. In this study, we sought ECG clues which may f...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2018.09.006
更新日期：2018-01-01 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
