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 frequency domain to compute an average cardiac complex (P, QRS, and T). This complex is used for analysis of late potentials, bundle of His activity, and detection of coronary artery disease using its high-frequency content. Both time- and frequency-domain methods are implemented for analysis of ventricular late potentials. In the time-domain method, the average beat is bandpass filtered using three lower cutoff frequencies--25, 40, and 80 Hz--with the higher cutoff at 250 Hz. For each of these frequencies, the following features are extracted: RMS voltages in terminal 40 and 50 msec; ventricular activation time; and duration of high-frequency, low-amplitude signals. The frequency-domain analysis examines the spectral contents of the windowed segment of terminal QRS; ST-segment; and a combined segment of QRS and ST. The spectral features include ratios of magnitudes of Fourier coefficients and areas above 20 Hz, dB drop at 40 Hz, and areas after 60 dB offset. Initial testing of this system is complete, and it is due for clinical trials soon.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Reddy BR,Christenson DW,Rowlandson GIdoi
10.1016/0022-0736(88)90062-3subject
Has Abstractpub_date
1988-01-01 00:00:00pages
S74-9eissn
0022-0736issn
1532-8430journal_volume
21 Supplpub_type
杂志文章abstract：:Implantable cardioverter defibrillators (ICDs) detect and defibrillate ventricular fibrillation (VF) and ventricular tachycardia (VT). Other therapies which use less energy are also available to terminate VT. Previous studies have shown that ICD rate schemes often misdiagnose VT as VF. In this study, an improved VF cl...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(98)80060-5
更新日期：1998-01-01 00:00:00
abstract：BACKGROUND AND PURPOSE:Descriptions of the significance of ST segment or QRS abnormalities in myocarditis are limited because documentation of the diagnosis has previously required myocardial biopsy. Late gadolinium enhancement (LGE) and T2 weighted imaging in the midventricular wall on cardiac magnetic resonance imagi...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2014.07.018
更新日期：2014-11-01 00:00:00
abstract：:Strength-interval curves and conduction times were determined in anesthetized dogs during and following myocardial ischemia using a computerized system capable of determining a 5 point strength-interval curve with conduction times within 20 seconds. At the peak incidence of ligation arrhythmias (5 minutes of ischemia)...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(79)80060-6
更新日期：1979-07-01 00:00:00
abstract：BACKGROUND:Our aim was to evaluate the intermittent use of a handheld ECG system for detecting silent arrhythmias and cardiac autonomic dysfunction in children with univentricular hearts. METHODS:Twenty-seven patients performed intermittent ECG recordings with handheld devices during a 14-day period. A manual arrhythm...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2014.02.006
更新日期：2014-05-01 00:00:00
abstract：BACKGROUND:Reducing time to reperfusion treatment for patients with ST-segment elevation myocardial infarction (STEMI) improves patient outcomes. Few medical systems consistently meet current benchmarks regarding timely access to treatment. Studies have widely demonstrated that prehospital 12-lead electrocardiography c...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2009.03.011
更新日期：2009-09-01 00:00:00
abstract：:This report presents an unusual type of conduction disturbance of the left bundle branch which appeared in a patient with acute bacterial endocarditis of the aortic valve in which the septum was also invaded. This is the first case found in which the partial left bundle branch block (LBBB) was of acute inflammatory or...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(77)80073-3
更新日期：1977-07-01 00:00:00
abstract：OBJECTIVE:The objective of this study is to evaluate the incidence, predictors, and outcome of complete ST-segment resolution (STR) during transportation after pretreatment with dual or triple antiplatelet therapy in the Ongoing Tirofiban in Myocardial Infarction Evaluation (On-TIME) 2 trial. METHODS:Patients with ST-...
journal_title：Journal of electrocardiology
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jelectrocard.2010.09.010
更新日期：2011-01-01 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：:The American College of Cardiology recommends that patients with high risk acute myocardial infarction (AMI) be triaged to hospitals with percutaneous transluminal coronary angioplasty capability. However, there are no prehospital triage criteria to select candidates for bypassing community hospitals and being taken d...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1054/jelc.2000.20299
更新日期：2000-01-01 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：UNLABELLED:By definition, the electrocardiographic (ECG) patterns of left bundle-branch block (LBBB) represent distinctive changes in duration and shape of the QRS complex caused by intraventricular conduction delay in the left ventricle (LV) due to structural abnormalities in the His-Purkinje conduction system and/or ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2011.03.007
更新日期：2011-11-01 00:00:00
abstract：:Serial electrocardiograms (ECGs) of 49 patients receiving adriamycin were analyzed for the development of persistent changes. The ECG changes were compared with those of a control group of 20 patients receiving other chemotherapeutic drugs, which were comparable to the additional chemotherapy received by the adriamyci...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(78)80122-8
更新日期：1978-07-01 00:00:00
abstract：:Thoracic electromaps were recorded before and after sublingual nitroglycerin (NG) in 26 subjects 15 and 30 days after acute myocardial infarction (MI), in order to evaluate the effect of the drug on injury potentials. Ten patients with documented left ventricular aneurysm were also studied 5 to 46 months after acute M...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(81)81007-2
更新日期：1981-10-01 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：:This article shows the use of the equivalent surface source model in its application to the genesis of the surface ECG in which the sources are of the double layer type. This model has previously been shown to yield an accurate description of body surface potentials during the QRS interval. Its application to the gene...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1054/jelc.2001.28896
更新日期：2001-01-01 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：:The vectorcardiographic basis of indeterminate QRS axis has not been elucidated. Accordingly, Frank lead VCGs were obtained on ten consecutive subjects with biphasic QRS complexes in the six extremity leads. The frontal plane vector in each case showed a very narrow loop inscribed in a symmetrical fashion around the E...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(82)80022-8
更新日期：1982-01-01 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：:We reported a case of Wolff-Parkinson-White syndrome with atrial double potential in coronary sinus (CS) electrograms during paroxysmal supraventricular tachycardia and ventricular pacing. The first component was low in frequency, and its timing was the same as atrial potential recorded by ablation catheter above the ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2007.02.002
更新日期：2007-09-01 00:00:00
abstract：:Ventricular fibrillation (VF) had been traditionally considered as a highly disorganized process of random electrical activity emanating from multiple, short-lived, reentrant electrical waves. It is the incessant breakup of wave fronts and the creation of new daughter waves (wavebreaks) that perpetuate VF. Other studi...
journal_title：Journal of electrocardiology
pub_type： 杂志文章,评审
doi：10.1016/j.jelectrocard.2007.06.021
更新日期：2007-11-01 00:00:00
abstract：:We present a case of a woman with an asymptomatic intermittent 2:1 atrioventricular block. The baseline ECG showed a wide QRS with right bundle branch block pattern. Measurement of the HV interval during electrophysiological study was normal. During electrophysiological stimulation, a unique pattern of paradoxical con...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2017.03.003
更新日期：2017-01-01 00:00:00
abstract：:The authors investigated the usefulness of the Karhunen-Loeve technique applied to body surface maps to study regional cardiac excitation. Eigenvectors were derived from the body surface potential maps of 120 healthy adults using the Karhunen-Loeve expansion theory. Then, in the maps of various types of ventricular hy...
journal_title：Journal of electrocardiology
pub_type： 临床试验,杂志文章
doi：10.1016/0022-0736(90)90148-u
更新日期：1990-01-01 00:00:00
abstract：:The ability of ECG-VCG to predict the severity of postinfarction LV asynergy was evaluated in 152 patients with previous myocardial infarction who underwent left cineventriculography in the right anterior oblique view. Various ECG and VCG signs were examined in order to predict the existence of severe asynergy in gene...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(84)81092-4
更新日期：1984-04-01 00:00:00
abstract：BACKGROUND:Conflicting evidence exists on the efficacy of focal impulse and rotor modulation on atrial fibrillation ablation. A potential explanation is inaccurate rotor localization from multiple rotors coexistence and a relatively large (9-11mm) inter-electrode distance (IED) of the multi-electrode basket catheter. ...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2017.08.032
更新日期：2018-01-01 00:00:00
abstract：:Electrocardiograms and His bundle electrograms were presented from a patient with a rare combination of intermittent bilateral bundle branch block. Critical analyses of R-R intervals and evolution of bundle branch block patterns revealed both tachycardia dependent right bundle branch block and bradycardia dependent le...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(81)80057-x
更新日期：1981-01-01 00:00:00
abstract：:The present study describes the successful radiofrequency ablation of an uncommon type of A-V nodal tachycardia. Electroanatomical mapping of the right atria was used to locate the region of the earliest atrial activation and allowed for positioning of the ablation catheter and a successful 25-watt radiofrequency burn...
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：:The objective of this article is to present a set of methods for constructing realistic computational models of cardiac structure from high-resolution structural and diffusion tensor magnetic resonance images and to demonstrate the applicability of the models in simulation studies. The structural image is segmented to...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2008.12.003
更新日期：2009-03-01 00:00:00
abstract：:This study was designed to clarify the mechanism of reperfusion arrhythmia. In the mongrel dogs, the left anterior descending coronary artery was occluded for 15 min and then the ligation was released. The dogs were divided into two groups: one was the control group, and the other the indomethacin group in which indom...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(82)81012-1
更新日期：1982-10-01 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：BACKGROUND:We assessed the specificity of wide QRS complex tachycardia (WCT) differentiating algorithms in patients with preexistent left bundle branch block (LBBB) and heart failure. METHODS:Three hundred fourteen patients with resynchronization devices were retrospectively screened. electrocardiograms with supravent...
journal_title：Journal of electrocardiology
pub_type： 临床试验,杂志文章
doi：10.1016/j.jelectrocard.2011.08.012
更新日期：2012-05-01 00:00:00
