abstract：:Atrial arrhythmias are diagnosed on the basis of the analysis of P wave morphology, timing and rate, the surface electrocardiogram, and intracardiac recordings. Recent intracardiac studies have demonstrated dissimilar atrial rhythms with direct intra-atrial recordings, the former otherwise not evident on the surface E...

journal_title：Journal of electrocardiology

authors： Martinez EE,Pontes S,dePaola AA,Gomes JA

更新日期：1991-04-01 00:00:00

abstract：:An asymptomatic 19-year-old top-level athlete had electrocardiographic evidence of intermittent cardiac preexcitation and intermittent left bundle branch block. The electrophysiologic study demonstrated the presence of a direct accessory pathway and enhanced atrioventricular node conduction that resulted in infrahisia...

journal_title：Journal of electrocardiology

authors： Buja G,Canciani B,Martini B,Scognamiglio R,Corrado D,Nava A

更新日期：1991-01-01 00:00:00

abstract：:The accuracy of a real-time analysis Holter system (Oxford Medilog 4500) in detecting ventricular and supraventricular arrhythmias was evaluated. Hand-counted data from randomly selected hours of 152 ECG monitorings of 152 patients were used as the control standard. Accuracy of the system was evaluated on 606 hours fo...

journal_title：Journal of electrocardiology

authors： Lanza GA,Lucente M,Rebuzzi AG,Cortellessa MC,Tamburi S,Mancuso P,Neri R,Manzoli U

更新日期：1990-10-01 00:00:00

abstract：:In a patient with Wolff-Parkinson-White syndrome and an inferior-posterior bypass tract, transient restoration of normal conduction occurred during an attack of angina. The ECG pattern of inferior posterior ischemia was present when the conduction was normal. Thallium scintigraphy showed a reversible posterolateral pe...

journal_title：Journal of electrocardiology

authors： Mangiafico RA,Petralito A,Grimaldi DR

更新日期：1990-07-01 00:00:00

abstract：:A successive RR interval plot was developed to analyze arrhythmia. The plot consisted of a set of points with the x-value of (N)th RR interval and the y-value of (N + 1)th RR interval. This method was applied in the arrhythmia analysis of Holter electrocardiograms obtained from 35 patients. In the analysis of ventricu...

journal_title：Journal of electrocardiology

authors： Anan T,Sunagawa K,Araki H,Nakamura M

更新日期：1990-07-01 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

authors： Izumi K

更新日期：1990-04-01 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

authors： Watabe S,Hayashi H,Yamada Y,Miyaji K,Yabe S,Sotobata I,Iwata A,Suzumura N

更新日期：1990-01-01 00:00:00

abstract：:A prolonged QT interval is an important prognostic indicator for cardiac arrhythmias and sudden death. The conventional QT interval measurement, however, includes in its measure the cardiac depolarization (QRS) as well as the cardiac repolarization (JT) intervals. To evaluate the relative contribution of the depolariz...

journal_title：Journal of electrocardiology

authors： Das G

更新日期：1990-01-01 00:00:00

abstract：:Hidden Markov modelling (HMM) is a powerful stochastic modelling technique that has been successfully applied to automatic speech recognition problems. We are currently investigating the application of HMM to electrocardiographic signal analysis with the goal of improving ambulatory ECG analysis. The HMM approach spec...

journal_title：Journal of electrocardiology

authors： Coast DA,Cano GG,Briller SA

更新日期：1990-01-01 00:00:00

abstract：:The widespread clinical application of implantable electrical defibrillation devices has engendered considerable interest into the mechanism of action of such devices. In addition, better means of rapid detection of postshock efficacy have been sought. The authors performed this study to test the following hypotheses:...

journal_title：Journal of electrocardiology

authors： Witkowski FX,Penkoske PA

更新日期：1990-01-01 00:00:00

abstract：:Pacemaker capture during the supernormal period was seen in a case of modulated parasystole where ectopic cycles occurred without any interposed nonparasystolic beat. This contrasts with previous clinical reports, since, in the latter, the parasystolic cycle length could not be measured directly. As in experimental st...

journal_title：Journal of electrocardiology

authors： Castellanos A,De La Hera A,Luceri RM,Mendoza IJ,Myerburg RJ

更新日期：1989-10-01 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

authors： Oreto G,Satullo G,Luzza F,Carerj S,Arrigo F,Schamroth L

更新日期：1989-07-01 00:00:00

abstract：:Electrocardiographic manifestation mimicking the hyperacute phase of myocardial infarction and the electrical alternans of the elevated ST-segment in association with subarachnoid hemorrhage were reported in two patients with no evidence of heart disease. In both cases the ST-segment changes were transient and there w...

journal_title：Journal of electrocardiology

authors： Nakamura Y,Kaseno K,Kubo T

更新日期：1989-04-01 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

authors： Malik M,Camm AJ

更新日期：1989-01-01 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 ...

journal_title：Journal of electrocardiology

authors： Gitter MJ,Salerno DM,Berry DA,Fifield JH,Farmer CK

更新日期：1989-01-01 00:00:00

abstract：:The authors focus on computational separation of the individual patterns of occlusion of the major segments of the right coronary artery. The raw patterns of occlusion throughout 15 standard subdivisions of the coronary arterial tree and body surface isoarea maps for 8 consecutive 10-msec intervals of QRS were examine...

journal_title：Journal of electrocardiology

authors： Horan LG,Sridharan MR,Flowers NC,Killam HA

更新日期：1989-01-01 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

authors： Klainman E,Sclarovsky S,Mager A,Topaz O,Agmon J

更新日期：1988-11-01 00:00:00

abstract：:Sintered Ag-AgCl needle electrodes were used to record unipolar directly coupled (DC) electrograms transmurally from right and left ventricular myocardium. Direct coupling yields unfiltered low-frequency signal content, preserving repolarization waveform morphology. These electrograms were analyzed using completely au...

journal_title：Journal of electrocardiology

authors： Witkowski FX,Penkoske PA

更新日期：1988-08-01 00:00:00

abstract：:Isomagnetic maps were recorded in normal subjects and in patients with systolic overloading of the right ventricle. The isomagnetic maps examined in this study indicated the instantaneous current source of the heart by applying the "corkscrew rule." The magnetic field recorded by a second derivative gradiometer detect...

journal_title：Journal of electrocardiology

authors： Nakaya Y,Takeuchi A,Nii H,Katayama M,Nomura M,Fujino K,Saito K,Mori H

更新日期：1988-04-01 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

authors： Froning JN,Olson MD,Froelicher VF

更新日期：1988-01-01 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

authors： Reddy BR,Christenson DW,Rowlandson GI

更新日期：1988-01-01 00:00:00

abstract：:We studied the influence of exercise level, severity of coronary artery disease (CAD), presence of previous myocardial infarction (MI), anterior or diaphragmatic, on the clinical value of exertional Q wave changes (Delta-Q). We retrospectively evaluated the exercise electrocardiograms of 62 patients without angiograph...

journal_title：Journal of electrocardiology

authors： DeCaprio L,Ascione L,Cuomo S,Vigorito C,Brienza A,Acanfora D,Papa M,Donatiello A,Chieffo C,Rengo F

更新日期：1988-01-01 00:00:00

abstract：:The authors comment on the present status of computerized electro-cardiogram (ECG) works in Japan and demonstrate the preliminary tentative results of CSE (common standards for quantitative electrocardiography) data analysis using the Nagoya program. The more detailed results of the performance of several programs in ...

journal_title：Journal of electrocardiology

authors： Okamoto N,Ohsawa N

更新日期：1988-01-01 00:00:00

abstract：:The addition of propranolol to mexiletine may reduce the adverse effects of mexiletine and possibly increase its efficacy. We compared the cellular electrophysiologic effects of this combination with mexiletine and propranolol alone, over concentration ranges of 3.2 to 100 microM mexiletine and 0.80 to 25.0 microM pro...

journal_title：Journal of electrocardiology

authors： Berman ND,Loukides JE

更新日期：1987-11-01 00:00:00

abstract：:A rigorous mathematical analysis of Electrocardiogram (ECG) data is presented in this paper, as a decision support system for ECG interpretation. The mathematical analysis: provides a new insight to the ECG data, provides flexibility for future understanding of the heart system or the ECG, and avoids the need of measu...

journal_title：Journal of electrocardiology

authors： Marcus M,Cohen A,Hammerman H,Inbar G

更新日期：1987-10-01 00:00:00

abstract：:Traditional electrocardiographic (ECG) and vectorcardiographic (VCG) criteria for left ventricular enlargement (LVE) understandably emphasize the increased tendency of the maximal electrical forces of ventricular depolarization to be directed toward the left. This tendency is manifested on the ECG by increased amplitu...

journal_title：Journal of electrocardiology

authors： Warner RA,Hill NE

更新日期：1987-10-01 00:00:00

abstract：:Sources of error in averaging for late ventricular potentials include variations in the magnitude and timing of late potentials as well as variability in the temporal alignment of successive cardiac cycles during averaging. Since these errors can both attenuate high frequency signals and add artifactual components to ...

journal_title：Journal of electrocardiology

authors： Craelius W,Restivo M,el-Sherif N

更新日期：1987-10-01 00:00:00

abstract：:We have developed a computer program which simulates a paced cardiac rhythm strip, graphically generating the electrocardiogram (ECG) on a color monitor. Any pacemaker, programmed as desired, dynamically interacts with a preselected intrinsic rhythm. Utilizing symbols prevalent in the pacing industry, this graphics-or...

journal_title：Journal of electrocardiology

authors： Byrd CB,Byrd CL

更新日期：1987-10-01 00:00:00

abstract：:We measured action potential duration (APD) from the endocardium (Endo) and epicardium (Epi) of the left ventricular free wall in Japanese monkey hearts and found that the APD of Endo is significantly longer than that of Epi at a stimulus cycle length of 1500 msec in normal Tyrode solution (control condition). We then...

journal_title：Journal of electrocardiology

authors： Imanishi S,Arita M

更新日期：1987-07-01 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

authors： Yasumura S,Kubota I,Ikeda K,Tsuiki K,Yasui S

更新日期：1987-04-01 00:00:00

abstract：:Time course evolution of R, Q, T and ST components of the electrocardiogram during the first 12 hours of an acute myocardial infarction was studied. A comparison between anterior-extensive and anteroseptal wall infarctions (anterior group), and inferior-extensive and inferior wall infarction (inferior group) showed ap...

journal_title：Journal of electrocardiology

authors： Klainman E,Sclarovsky S,Lewin RF,Topaz O,Farbstein H,Pinchas A,Fohoriles L,Agmon J

更新日期：1987-04-01 00:00:00

abstract：:Intracellular and extracellular recording techniques were used to study triggered activity in tissues isolated from the inferior right atrium of the dog. In the presence of norepinephrine (greater than 10(-7) M) single stimuli or short rapid pacing elicited action potentials with delayed after-depolarizations, leading...

journal_title：Journal of electrocardiology

authors： Lipsius SL

更新日期：1987-01-01 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

authors： Maehara K,Kyono H,Kitaoka S,Shimizu Y,Maruyama Y,Ashikawa K,Ino-Oka E,Takishima T

更新日期：1986-07-01 00:00:00

abstract：:In order to differentiate posterior (posterolateral) myocardial infarction (PMI) from the anterior shift of the QRS loop in "normal variant" cases using a vectorcardiogram, the T loop as well as the QRS loop in the transverse plane (TP) were analyzed in 34 elderly Japanese males with angiographically-proven PMI and in...

journal_title：Journal of electrocardiology

authors： Takatsu F,Osugi J,Nagaya T,Uwatoko M,Watabe S,Ishikawa H

更新日期：1986-04-01 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

authors： Lee YS

更新日期：1986-01-01 00:00:00

abstract：:In a patient with the sick sinus syndrome and near syncope a prolonged sinus pause was documented and reproduced thereafter during sustained deep inspiration. Administration of intravenous atropine abolished this phenomenon, most probably indicating a hyperresponsiveness of the sinus node and AV junction to a vagotoni...

journal_title：Journal of electrocardiology

authors： Strasberg B,Sclarovsky S,Arditti A,Lewin RF,Agmon J

更新日期：1986-01-01 00:00:00

abstract：:To assess the prognostic significance and the clinical implications of the electrocardiographic findings of the first acute myocardial infarction, the in-hospital mortality and complications and three-year follow-up of 180 patients were analyzed. The patients were divided according to the infarction type (transmural, ...

journal_title：Journal of electrocardiology

authors： Aysha MH,Shayib MA

更新日期：1985-10-01 00:00:00

abstract：:A 53-year-old man with myocardial infarction was found to have frequent premature ventricular beats. The predominant pattern was classical concealed trigeminy; i.e., the number of conducted sinus beats, S, between extrasystoles satisfied the equation S = 3n + 2, where "n" is zero or any positive integer. Two other tra...

journal_title：Journal of electrocardiology

authors： Medeiros CM,Medeiros NP,de Nonohay NC,Rodrigues R

更新日期：1985-10-01 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

authors： Kornreich F,Rautaharju PM,Warren JW,Horacek BM,Dramaix M

更新日期：1985-10-01 00:00:00

abstract：:The ECG phenomena in 20 outpatients (121 episodes) suffering from variant angina with transient ST segment elevation greater than 1.5 mm. (Prinzmetal angina) were studied by Holter monitoring. The most important changes in the ECG morphology were: a) increased height of the R wave in all cases, b) the S wave decreased...

journal_title：Journal of electrocardiology

authors： Bayes de Luna A,Carreras F,Cladellas M,Oca F,Sagues F,Garcia Moll M

更新日期：1985-07-01 00:00:00