Ventriculoatrial conduction in complete atrioventricular block.

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

authors： Jhamnani S,Fuisz A,Lindsay J

更新日期：2014-11-01 00:00:00

abstract：BACKGROUND:Analysis of ST-segment elevation for assessment of patients with suspected acute coronary occlusion is in widespread use for diagnostic and prognostic purposes. In this study, changes in the QRS complex also were analyzed to determine if these changes that are seldom used clinically can provide additional pr...

journal_title：Journal of electrocardiology

authors： Weston P,Johanson P,Schwartz LM,Maynard C,Jennings RB,Wagner GS

更新日期：2007-01-01 00:00:00

abstract：:The typical QRS patterns of myocardial infarction (MI-QRS) are commonly attributed to myocardial cellular death. However, observation of a transient appearance of MI-QRS during coronary insufficiency, the disappearance of MI-QRS after coronary by-pass surgery and the appearance of MI-QRS after intracranial hemorrhage ...

journal_title：Journal of electrocardiology

authors： Piccolo E,Delise P,Raviele A,D'Este D,Lucangeli F,Pascotto P,Dainese F,Di Pede F

更新日期：1983-10-01 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：: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：: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：:Continuously updated ST-segment recovery analysis has been shown to accurately predict infarct-related artery patency. Salient principles were converted into algorithms and incorporated into a portable ST monitor for optimal application. This study tested the automated program's ability to detect occlusion and reperfu...

journal_title：Journal of electrocardiology

authors： Veldkamp RF,Sawchak S,Pope JE,Califf RM,Krucoff MW

更新日期：1996-10-01 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

authors： Morlet D,Peyrin F,Desseigne P,Touboul P,Rubel P

更新日期：1993-10-01 00:00:00

abstract：:The sensitivity of an extensive electrocardiographic examination to local cardiac regions was evaluated by comparison with findings in vectorcardiographic leads. Evaluation consisted of comparing QRS areas during different ventricular activation patterns. The ratio of areas from the vector-cardiogram (VCG) and extensi...

journal_title：Journal of electrocardiology

authors： Abildskov JA

更新日期：1976-01-01 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：: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

authors： Zywietz C,Celikag D,Joseph G

更新日期：1996-01-01 00:00:00

abstract：:Vagally mediated paroxysmal atrial fibrillation is typically described to occur in otherwise healthy young-to-middle aged males during periods of high vagal tone. We report a case of cardioinhibitory type neurocardiogenic syncope associated with atrial fibrillation in an elderly female during episodes of nausea. This ...

journal_title：Journal of electrocardiology

authors： Sriram CS,Naccarelli GV,Luck JC

更新日期：2014-09-01 00:00:00

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

authors： Bryant AR,Wilton SB,Lai MP,Exner DV

更新日期：2013-03-01 00:00:00

abstract：:A 66-year-old woman with a long history of hypertension had an electrocardiogram with giant negative U waves in left precordial leads despite hypokalemia. This seems to be the first report of giant negative U waves induced by uncontrolled hypertension with hypokalemia. The occurrence of negative U waves in the presenc...

journal_title：Journal of electrocardiology

authors： Kanemoto N,Nakayama K,Ide M,Goto Y

更新日期：1992-04-01 00:00:00

abstract：BACKGROUND:Performance of ambulatory electrocardiography (AECG) may provide data useful for counseling patients regarding prognosis and for selecting potential patients for defibrillator implantation, but this practice remains controversial. METHODS:We reviewed clinical and AECG data on 355 patients diagnosed with dil...

journal_title：Journal of electrocardiology

authors： Baker RL,Koelling TM

更新日期：2005-01-01 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

authors： Weaver SK,Fulkerson PK,Lewis RP,Leier CV

更新日期：1978-07-01 00:00:00

abstract：:No prior studies have evaluated the relationship between the site of right ventricular stimulation, the site of prior infarction, and the inducibility of ventricular tachycardia (VT). This study was performed to determine if the location of pathologic Q waves influences the inducibility of VT at various right ventricu...

journal_title：Journal of electrocardiology

authors： Harvey M,Goyal R,Knight BP,Man KC,Strickberger SA,Morady F

更新日期：1998-10-01 00:00:00

abstract：:Exercise testing was evaluated in 51 patients with critical left coronary artery disease (LCA) documented by coronary arteriography within two weeks of their bicycle ergometer (26 patients) or treadmill (25 patients) electrocardiographic study. Adequate tests, as defined by the patient having reached 85% of predicted ...

journal_title：Journal of electrocardiology

authors： Timmis GC,Westveer DC,Gordon S,Ramos RG,Gangadharan V

更新日期：1979-07-01 00:00:00

abstract：:Have we a challenge of credibility in the invasive treatment of atrial fibrillation (AFIB)? The incidence of AFIB in the European Union (EU) is about 600,000 cases per year, while only 100,000 get an invasive treatment with a failure rate of close to 40%. Those that remain in AFIB need two times more hospitalizations ...

journal_title：Journal of electrocardiology

authors： Azpilicueta J,Chmelevsky M,Potyagaylo D

更新日期：2018-01-01 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

authors： Miyazaki Y,Kotaka K,Ogawa K,Satake T,Sugiyama S,Ozawa T

更新日期：1982-10-01 00:00:00

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

authors： Caswell SA,Jenkins JM,DiCarlo LA

更新日期：1998-01-01 00:00:00

abstract：:In 37 consecutive patients with acute myocardial infarction undergoing Streptokinase infusion and acute coronary angiography, the electrocardiographic findings were compared with the findings during angiography. All 15 patients with an occluded right coronary artery demonstrated an electrocardiographic pattern of an a...

journal_title：Journal of electrocardiology

authors： Niggemann B,Gann D

更新日期：1984-07-01 00:00:00

abstract：:Effects of pirmenol hydrochloride and lidocaine hydrochloride on intraventricular conduction were examined in the infarcted heart of anesthetized dogs. The effects of the drugs on the excitation induced by ventricular stimulations were determined with coupling intervals between 150 and 1,000 ms. Effects of the drugs o...

journal_title：Journal of electrocardiology

authors： Hashimoto H,Ozaki T,Nagashima S,Nakashima M

更新日期：1991-10-01 00:00:00

abstract：:Left bundle branch block (LBBB), traditionally viewed as an electrophysiologic abnormality, is increasingly recognized for its profound hemodynamic effects. LBBB causes asynchronous myocardial activation, which, in turn, may trigger ventricular remodeling. Exercise nuclear studies frequently show reversible perfusion ...

journal_title：Journal of electrocardiology

authors： Littmann L,Symanski JD

更新日期：2000-01-01 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

authors： Goldberger AL

更新日期：1982-01-01 00:00:00

abstract：:Previous studies indicate that the predictive value of atrial fibrillatory rate in patients undergoing cardioversion of atrial fibrillation (AF) of long duration is limited. The present study investigates signal entropy in this setting. Standard 12-lead electrocardiograms (ECGs) were recorded from 66 consecutive patie...

journal_title：Journal of electrocardiology

authors： Petersson R,Sandberg F,Platonov PG,Holmqvist F

更新日期：2011-03-01 00:00:00

abstract：:A method has been developed for establishing a "University Without Walls" for the purpose of studying the relationship between electrocardiographic estimation and magnetic resonance imaging measurements of myocardial infarct size. The research team includes faculty and students from 4 medical centers, with expertise e...

journal_title：Journal of electrocardiology

authors： Wagner GS,Engblom H,Billgren T,Carlsson M,Hedstrom E,Ugander M,Selvester RH,Arheden H,Eisenstein E,Kasper J,White R

更新日期：2001-01-01 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

authors： Dahlqvist JA,Karlsson M,Wiklund U,Hörnsten R,Rydberg A

更新日期：2014-05-01 00:00:00

abstract：:An analytical study was performed to estimate the magnitude of the visual Q wave duration bias produced by pressurized ink round stylus electrocardiographic (ECG) recorders. With a paper speed of 25 mm/sec and the ECG tracing width of 0.25 mm, the visually measured Q waves are on the average 8 msec too short. The corr...

journal_title：Journal of electrocardiology

authors： Rautaharju PM,Seale D,Prineas R,Wolf H,Crow R,Warren J

更新日期：1978-10-01 00:00:00

abstract：:The electrocardiogram (ECG) is a relatively insensitive tool for the detection of right ventricular hypertrophy (RVH), but some criteria have high specificity. The recommended ECG screening criteria for RVH are not sufficiently sensitive or specific for screening for mild RVH in adults without clinical cardiovascular ...

journal_title：Journal of electrocardiology

authors： Nikus K,Pérez-Riera AR,Konttila K,Barbosa-Barros R

更新日期：2018-01-01 00:00:00