abstract：:Many electrocardiographic criteria have been proposed for the differentiation of ventricular extrasystole and supraventricular conduction with aberrancy in atrial fibrillation but the validity of these have not been confirmed by intracardiac studies. We recorded His bundle electrograms in nineteen patients (eleven men...

journal_title：Journal of electrocardiology

authors： Gulamhusein S,Yee R,Ko PT,Klein GJ

更新日期：1985-01-01 00:00:00

abstract：:Exercise-induced changes in the ST segments of the electrocardiogram were compared with the results of coronary arteriography in 73 consecutive patients referred for preoperative evaluation of coronary artery disease. Eighteen patients had single-, 25 double-, and 30 triple-vessel disease. Thirteen were taking digital...

journal_title：Journal of electrocardiology

authors： Hajduczki I,Berenyi I,Enghoff E,Malmberg P,Erikson U

更新日期：1985-01-01 00:00:00

abstract：:From 81,000 ECGs we collected 83 cases that fulfilled the criteria of Interatrial Conduction Disturbances with Left Atrial Retrograde Activation (IACD-LARA) (P +/- in II, III and VF with P width greater than or equal to 120 msec.). We present the detailed study of 35 cases with surface ECG and VCG and 29 cases with or...

journal_title：Journal of electrocardiology

authors： Bayes de Luna A,Fort de Ribot R,Trilla E,Julia J,Garcia J,Sadurni J,Riba J,Sagues F

更新日期：1985-01-01 00:00:00

abstract：:Dilated cardiomyopathy is associated with an increase in transverse plane QRS voltage but a decrease in frontal plane QRS voltage. To study this paradoxical relationship further, electrocardiograms (ECGs) were retrospectively analyzed from five groups of men. Frontal plane QRS voltage was computed as the sum of peak-t...

journal_title：Journal of electrocardiology

authors： Goldberger AL,Dresselhaus T,Bhargava V

更新日期：1985-01-01 00:00:00

abstract：:A wide spectrum of types of right bundle branch block (RBBB) were studied utilizing the body surface potential maps (BSPMs) of 37 children. Although the spectrum varied from very advanced RBBB to minimal partial RBBB, a common diagnostic feature was the absence of evidence for right ventricular breakthrough in the map...

journal_title：Journal of electrocardiology

authors： Liebman J,Rudy Y,Diaz P,Thomas CW,Plonsey R

更新日期：1984-10-01 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：: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

authors： Piccolo E,Delise P,Trevi G,DiPede F,Allibardi P,Sheiban I,Reale A,Martuscelli E

更新日期：1984-04-01 00:00:00

abstract：:Under hypoxic (95% N2 + 5% CO2) perfusion, electrophysiological effects of L-carnitine on canine papillary muscles were studied using standard microelectrode techniques. During hypoxic perfusion for 60 min, resting membrane potential (RMP), action potential amplitude (APA) and maximum upstroke velocity of phase 0 were...

journal_title：Journal of electrocardiology

authors： Hayashi H,Suzuki Y,Abe M,Nishihara K,Masumura Y,Kamikawa T,Kobayashi A,Yamazaki N

更新日期：1984-01-01 00:00:00

abstract：:Five male patients with chronic stable ventricular arrhythmias underwent a placebo controlled ascending dose study with oral cibenzoline, a new type 1 antiarrhythmic drug. Ambulatory ECG (Holter) recordings and electrophysiologic studies were done while on placebo and on the maximum dose of cibenzoline. Drug toxicity,...

journal_title：Journal of electrocardiology

authors： Kushner M,Magiros E,Peters R,Carliner N,Plotnick G,Fisher M

更新日期：1984-01-01 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：: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

authors： Musselman EE

更新日期：1983-07-01 00:00:00

abstract：:A retrospective study was conducted to define the incidence of ventricular ectopic beats with exit block (concealed extrasystoles). Of 904 Holter recordings, 92 were admitted for study on the basis of sufficient ventricular ectopic beats on rhythm strips. Concealed bigeminy conforming to the equation of S = 2n - 1 (wh...

journal_title：Journal of electrocardiology

authors： Anderson GJ,Greenspan M

更新日期：1983-04-01 00:00:00

abstract：:The electrocardiographic criteria for isolated left anterior fascicular block are reviewed and illustrated. Left anterior fascicular block decreases the voltage in the chest leads and increases the voltage in the limb leads. The usual voltage criteria of left ventricular hypertrophy must be modified appropriately. Cha...

journal_title：Journal of electrocardiology

authors： Milliken JA

更新日期：1983-04-01 00:00:00

abstract：:The utility of vectorcardiographic relative QRS loop area criteria in identifying significant hemodynamic abnormality (a mean pulmonary artery pressure greater than 25 mmHg and/or a pulmonary to systemic flow ratio greater than 1.5) in patients with cardiac lesions associated with selective right ventricular overload ...

journal_title：Journal of electrocardiology

authors： Curtiss EI,Cecchetti AA

更新日期：1983-01-01 00:00:00

abstract：:This study described the linear relationship of the myocardial infarct size, measured postmortem, to the integral of the sequential vector spatial magnitudes analyzed at 400 samples per second during the initial period of abnormal depolarization (IAD) in 25 patients with myocardial infarction (MI) and ten controls. Th...

journal_title：Journal of electrocardiology

authors： Cowan MJ,Reichenbach DD,Bruce RA,Fisher L

更新日期：1982-10-01 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：:Serial ECG's were reviewed in 93 consecutive patients who were proven to be susceptible to malignant hyperthermia by caffeine contracture and ATP depletion tests on skeletal muscle biopsies, but who were without a history of pyrexic crises. There were 46 males and 47 females with a mean age of 33 years. Abnormal ECG's...

journal_title：Journal of electrocardiology

authors： Huckell VF,Staniloff HM,Britt BA,Morch JE

更新日期：1982-04-01 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

authors： Yasuda T,Ribeiro LG,Holman BL,Alpert JS,Maroko PR

更新日期：1982-04-01 00:00:00

abstract：:A low-cost micro-processor combined with a standard 3-channel electrocardiographic recorder was adapted to polar coordinate conversion of Frank orthogonal lead signals and display of the resultant polarcardiogram. The processor also functions as a computer of average transients for the ECG complexes and provides autom...

journal_title：Journal of electrocardiology

authors： Grant ME,Hanson JS

更新日期：1982-01-01 00:00:00

abstract：:A 63 year old man with angina pectoris was found to have frequent extrasystoles separated by odd as well as even numbers of conducted sinus beats. Analysis of 935 conducted sinus beats showed that premature ventricular beats without interpolation were separated by odd numbers of conducted sinus beats in 117 sequences ...

journal_title：Journal of electrocardiology

authors： Bissett JK,Watson JW,Wanta-Matthews M,Ozemek H

更新日期：1982-01-01 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：:An inexpensive system was developed for automated on-line analysis of ST segment heights, Q, R, and S heights and areas under these peaks, using an LSI-11 microcomputer. System accuracy was evaluated using a computer graphics technique which enabled magnification and labelling of the computed peaks on 60 maps from 17 ...

journal_title：Journal of electrocardiology

authors： Henderson MB,Armstrong PW

更新日期：1982-01-01 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

authors： De Ambroggi L,Landolina M,Todeschini P,Galdangelo F,Ravizza P

更新日期：1981-10-01 00:00:00

abstract：:We have analyzed the Wilson ventricular gradient in terms of body surface potential maps and of the reduction of such surface patterns to equivalent dipoles or vectors. While the ventricular gradient traditionally was treated as first a scalar, then a vector concept, we found that the three entities (QRS area, T area,...

journal_title：Journal of electrocardiology

authors： Sridharan MR,Horan LG,Hand RC,Johnson JC,Sohi GS,Flowers NC

更新日期：1981-10-01 00:00:00

abstract：:Extra AV nodal Wenckebach periodicity was diagnosed in seven patients. The most frequent form of this conduction abnormality was an exit block. The underlying block was localized in the sinoatrial junction and in the atria in two patients; the AV junction and the ventricle were the site of the Wenckebach periodicity i...

journal_title：Journal of electrocardiology

authors： Schweitzer P,Choudhry M,Kunkes SH,Ress R,Mark H

更新日期：1981-07-01 00:00:00

abstract：:The amplitude of ECG wave forms can be evaluated rapidly and accurately with the help of a transparent overlay depicting images of the P-QRS-T complex in various leads. Such images are drawn between the upper and lower limits of normal amplitude values and by placing them over the corresponding P-QRS-T complexes in th...

journal_title：Journal of electrocardiology

authors： Wartak J

更新日期：1981-01-01 00:00:00

abstract：:In eighteen patients with atrioventricular conduction disturbance, His bundle electrograms were studied via the arm vein. A 6F Berkovits-Castellanos USCI hexapolar electrode catheter was introduced into the right atrium and looped across the tricuspid valve in a "golf club" shape. The main aim was to leave the two dis...

journal_title：Journal of electrocardiology

authors： Giuffrida G,Critelli G,Giudice P,Miceli D,Betocchi S,Mazza F,Chiariello M,Condorelli M

更新日期：1981-01-01 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

authors： Mitamura H,Ogawa S,Kobayashi H,Handa S,Nakamura Y

更新日期：1981-01-01 00:00:00

abstract：:Initial electrical forces emanating from interventricular septal depolarization, being directed to the right and anteriorly, normally produce an initial negative deflection or Q wave in leads I, aVL and V6 and an initial positive deflection or R wave in leads V1 and V2. The observations of hypertrophied interventricul...

journal_title：Journal of electrocardiology

authors： Das G,Collins J,Weissler AM

更新日期：1981-01-01 00:00:00

abstract：:VPC morphology was studied in the surface 12-leads ECGs (resting) in one hundred and thirty-six patients over a none-month period (January-September, 1978). Seventy four (54%) of these had coronary artery disease proven by cardiac catheterization (61) or by evidence of acute transmural myocardial infarction (13) diagn...

journal_title：Journal of electrocardiology

authors： Sharma PR,Chung EK

更新日期：1980-10-01 00:00:00

abstract：:A superficial accessory pathway was demonstrated by electrophysiologic techniques and surgical histopathology in 30-year-old male with Wolff-Parkinson-White syndrome, severe mitral valve disease and medically uncontrollable arrhythmias. In this patient, electrode catheter studies in the cardiac catheterization laborat...

journal_title：Journal of electrocardiology

authors： Untereker WJ,Litwak RS,Mindich BP,Wiemann G,Goldberg S,Gorlin R,Kupersmith J

更新日期：1980-10-01 00:00:00

abstract：:This study is a descriptive report of the occurrence of ventricular arrhythmias in a large, prospectively designed follow-up study of postcoronary patients. Six-hour Holter recordings were obtained on 954 postinfarction patients prior to hospital discharge and at 4 (n = 837), 8 (n = 762), 12 (n = 713), and 24 (n = 487...

journal_title：Journal of electrocardiology

authors： DeCamilla JJ,Davis HT,Moss AJ

更新日期：1980-04-01 00:00:00

abstract：:Morphology of ventricular ectopic complexes was examined in 1,746 ECGs of 149 patients with permanent ventricular pacemakers. In 20 of 80 patients (25%) the morphology of ventricular ectopic complexes was similar to that of the paced complex. This resulted in a ventricular couplet where the spontaneous premature compl...

journal_title：Journal of electrocardiology

authors： Surawicz B,Kuo CS,Reddy CP

更新日期：1980-04-01 00:00:00

abstract：:The present study was performed to evaluate the specificity of twin peaked P wave (TWPP) for left atrial overload (LOA) in orthogonal ECGs. A total of 2093 ECGs recorded with Frank's corrected orthogonal leads were used for analysis. It can be concluded from the present study that (1) TWPP is diagnostically non-specif...

journal_title：Journal of electrocardiology

authors： Ishikawa K,Pipberger HV

更新日期：1980-04-01 00:00:00

abstract：:A comparison was made of the electrophysiological properties of the fibers between the previously reported conduction pathways from the left atrium to the right atrium and to the ventricle (left A-V ring pathways) and the ordinary atrial muscle, using perfused isolated rabbit hearts. Each fiber within these pathways s...

journal_title：Journal of electrocardiology

authors： Tsuchihashi H,Suzuki F,Sano T

更新日期：1980-01-01 00:00:00

abstract：:A patient with acute extensive anterior and old inferior wall myocardial infarction developed left anterior hemiblock, resulting in loss of the electrocardiographic evidence of infarction. While the vectorcardiogram has generally been found useful in diagnosing coexistent hemiblock and inferior myocardial infarction, ...

journal_title：Journal of electrocardiology

authors： Khair GZ,Tristani FE,Brooks HL

更新日期：1980-01-01 00:00:00

abstract：:Direct Wenckebach periods in the left bundle branch with periods of 4:3 and 5:4 conduction alternating with 2:1 left bundle branch block (LBBB) were observed in a patient who was admitted because of congestive heart failure. There was no previous documented LBBB and serial electrocardiographic (ECG) mainfestations aft...

journal_title：Journal of electrocardiology

authors： Izumi K

更新日期：1980-01-01 00:00:00

abstract：:We are reporting a series of 13 out of a total of 16 patients in whom sinus nodal activity was recorded with the use of intra-atrial electrodes, during diagnostic His-bundle electrocardiography investigations. The protocol consisted of the simultaneous monitoring of the following intra-atrial points: high right atrium...

journal_title：Journal of electrocardiology

authors： Hombach V,Gil-Sanchez D,Zanker R,Behrenbeck DW,Tauchert M,Hilger HH

更新日期：1979-10-01 00:00:00

abstract：:A graph consisting of small squares of equal size preprinted on a transparent plastic chart can be used for a quick and accurate calculation of the VCG loop area in each quadrant of the three conventional planes. ...

journal_title：Journal of electrocardiology

authors： Wartak J

更新日期：1979-10-01 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

authors： Avitall B,Naimi S,Levine HJ,Mieszala J

更新日期：1979-07-01 00:00:00