Abstract：
:The long-term goal of electrocardiography is to relate electric potentials on the body surface with activities in the heart. Many previously reported studies have focused on direct links between heart and body surface potentials. The goals of this study were first to validate computational methods of determining volume potentials and currents with high-resolution experimental measurements and then to use interactive visualization of thoracic currents to understand features of the electrocardiographic fields from measured cardiac sources. We developed both simulation and experimental studies based on a realistic shaped torso phantom containing an isolated, perfused dog heart. Interventions included atrial pacing, single pacing and simultaneously pacing at multiple locations on the ventricles. Simulated torso volume potentials closely matched measured potentials in the torso-tank preparation (mean correlation coefficients of 0.95). Simulation further provided a means of estimating the current field in the torso from the computed torso volume potentials and the local geometric and conductive properties of the medium. Applying these techniques to the torso electric fields under a variety of pacing conditions, we have further demonstrated that thoracic current can provide many insights into the relationship between heart surface potential and body surface potentials. Specifically, we have shown that geometric factors including cardiac source configuration and location play an important role in determining to what extent electric activity in the heart is directly visible on the body surface electrocardiogram. The computation and visualization toolkit we developed in this study to explore current fields associated with cardiac events may provide new insights into electrocardiology.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Ni Q,MacLeod RS,Punske BB,Taccardi Bdoi
10.1054/jelc.2000.20309keywords:
subject
Has Abstractpub_date
2000-01-01 00:00:00pages
189-97eissn
0022-0736issn
1532-8430journal_volume
33 Supplpub_type
杂志文章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：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：:Standard 12-lead electrocardiograms with a Q wave in lead V1 were obtained from 32 subjects without organic cardiac disease and analyzed for features that might characterize an abnormal atrioventricular conduction through the fasciculoventricular Mahaim fiber. Following an infusion of ajmaline, the Q wave in V1 vanish...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/0022-0736(92)90030-4
更新日期：1992-10-01 00:00:00
abstract：:An image torso may be viewed as a one-to-one transform of a physical volume conductor to a geometric form which defines both the axis and sensitivity of any electrocardiographic connection. In this report, the image surfaces of laminar, spherical, rectangular and humanoid physical torsos are explored theoretically and...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(77)80037-x
更新日期：1977-01-01 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：BACKGROUND:Differentiation of wide complex tachycardias (WCTs) into ventricular tachycardia (VT) or supraventricular wide complex tachycardia (SWCT) using conventional manually-operated electrocardiogram (ECG) interpretation methods is difficult. Recent research has shown that accurate WCT differentiation may be accomp...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2020.05.004
更新日期：2020-01-01 00:00:00
abstract：:Vectorcardiograms were recorded by the canine modification of the axial lead system of McFee and Parungao from 38 necropsy-verified normal dogs placed in the recommended position of right lateral recumbency. A digital computer program was used to identify and analyze the spatial characteristics of the QRSsE loop. In o...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(83)80004-1
更新日期：1983-07-01 00:00:00
abstract：:From a population of 304 patients who were operated on for atrial septal defects, 25 patients with primum defects and 78 patients with secundum defects were studied with regard to the ability of various quantitative axial lead vectorcardiographic (VCG) data to predict the anatomical type of defect. The patients includ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(75)80023-9
更新日期：1975-01-01 00:00:00
abstract：:The purpose of this study was to describe the effects of gender and age on heart rate variability (HRV) in healthy volunteers (n = 111; 40 men and 71 women) and in persons after sudden cardiac arrest (SCA) (n = 95; 79 men and 16 women). Frequency-domain measurements and six time-domain measurements of HRV (SDANN, 24-h...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(94)80037-5
更新日期：1994-01-01 00:00:00
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journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(78)80098-3
更新日期：1978-04-01 00:00:00
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....
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(10)80019-6
更新日期：1992-01-01 00:00:00
abstract：:This article concerns a currently reported hypothesis explaining the alternations of conduction time during intra atrioventricular (AV) nodal reentrant tachycardia (AVNRT). This hypothesis supposes simple mutual influence of sequences of intranodal conduction during reentry tachycardia that use the same circuit in dif...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/0022-0736(89)90024-1
更新日期：1989-01-01 00:00:00
abstract：OBJECTIVE:The clinical benefit of percutaneous coronary intervention (PCI) is controversial in ST-segment elevation myocardial infarction (STEMI) patients presenting 12-72 hours after symptom onset. Several studies suggested this conflicting result was associated with myocardial area at risk (MaR) of enrolled patients....
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2015.01.004
更新日期：2015-03-01 00:00:00
abstract：:Acute coronary syndromes due to involvement of the left main trunk usually present with subtotal occlusion and electrocardiographic pattern with predominant ST depression (non-ST-elevation myocardial infarction). The cases with complete occlusion frequently present an ST-elevation myocardial infarction pattern, but th...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2012.05.001
更新日期：2012-09-01 00:00:00
abstract：:This is the first report on the stable occurrence of ventricular quadrigeminy as a manifestation of concealed bigeminy in a case of fixed and late coupled ventricular extrasystoles. A 46-year-old man is reported in whom the period of ventricular bigeminy alternated with the period of ventricular quadrigeminy. Coupling...
journal_title：Journal of electrocardiology
pub_type： 杂志文章,评审
doi：10.1016/s0022-0736(00)80106-5
更新日期：2000-01-01 00:00:00
abstract：:Brugada syndrome is a clinical-electrocardiographic entity predisposing to malignant ventricular arrhythmias. The typical arrhythmia is polymorphic ventricular tachycardia, which can potentially degenerate to ventricular fibrillation. Monomorphic ventricular tachycardia is uncommon. Our group is reporting the case of ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2011.12.009
更新日期：2012-05-01 00:00:00
abstract：BACKGROUND:QRS-duration predicts mortality in patients with heart failure and, to a lesser extent, the general population. However, in patients with diabetes, its prognostic significance is unknown. To better understand how QRS-duration relates to mortality among those with diabetes, we explored survival as a function ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2019.11.053
更新日期：2020-01-01 00:00:00
abstract：INTRODUCTION:Structural right atrial abnormalities have been described in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC). However, little is known about electrocardiographic signs of atrial involvement in ARVC because no systematic studies have been conducted. METHODS:P-wave-triggered signal-aver...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2010.08.008
更新日期：2011-03-01 00:00:00
abstract：:The modified Sgarbossa criteria have been established to aid in the diagnosis of ST-elevation myocardial infarction in patients with left bundle branch block. Thus far, the sensitivities and specificities of the Sgarbossa signs have only been evaluated retrospectively in cohorts of patients with and without occlusive ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2020.09.011
更新日期：2020-01-01 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
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2019.08.011
更新日期：2019-01-01 00:00:00
abstract：:A 52-year-old woman exhibited Mobitz type II atrioventricular block with right bundle branch block and 1:1 atrioventricular conduction at or slower than 80 beats/min. Electrophysiologic study revealed transient HV interval block followed by recovery from the block at shorter coupling intervals without prolongation of ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(98)90009-7
更新日期：1998-01-01 00:00:00
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journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2005.08.009
更新日期：2006-04-01 00:00:00
abstract：:Different genetic types of the long QT syndrome (LQTS) are associated with distinct ECG manifestations, which relate to the type and magnitude of ion channel dysfunction. The QTc duration does not differentiate LQTS types, and therefore other static and dynamic ECG parameters reflecting changes in T wave morphology ar...
journal_title：Journal of electrocardiology
pub_type： 杂志文章,评审
doi：10.1016/j.jelectrocard.2006.05.017
更新日期：2006-10-01 00:00:00
abstract：BACKGROUND:Coronary artery disease (CAD) is a leading cause of death and disability. Conventional non-invasive diagnostic modalities for the detection of stable CAD at rest are subject to significant limitations: low sensitivity, and personal expertise. We aimed to develop a reliable and time-cost efficient screening t...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2019.12.018
更新日期：2020-01-01 00:00:00
abstract：BACKGROUND:No direct comparison of current electrocardiogram (ECG) interpretation programs exists. OBJECTIVE:Assess the accuracy of ECG interpretation programs in detecting abnormal rhythms and flagging for priority review records with alterations secondary to acute coronary syndrome (ACS). METHODS:More than 2,000 di...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2019.11.043
更新日期：2020-01-01 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：: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
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2020.06.014
更新日期：2020-01-01 00:00:00
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：:We present an example of sudden modification in QRS morphology during ventricular pacing inside a scar-related isthmus. This is explained by a "concealed" sudden block in both the orthodromic and antidromic wavefront directions, allowing then the activation to proceed through a now overt antidromic conduction. ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2016.07.035
更新日期：2016-01-01 00:00:00
abstract：BACKGROUND:Temporary-permanent pacemakers [TPPM] are externally placed permanent generators attached to active fixation transvenous leads. TPPM can be used as an alternative to standard temporary pacing leads when placement of a permanent pacemaker is contraindicated. We sought to determine the incidence and risk facto...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2016.05.004
更新日期：2016-07-01 00:00:00
