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：:Bidirectional tachycardia was observed on Holter tracings recorded from a dog three days after the production of a small freeze lesion on the wall of the left ventricle. A bigeminal rhythm with fixed coupling of ventricular premature contractions was interrupted by a burst of ventricular tachycardia of different morph...

journal_title：Journal of electrocardiology

authors： Klein GJ,Wallace AG,Gallagher JJ

更新日期：1979-01-01 00:00:00

abstract：:A His bundle electrogram was obtained in a 70 year old male with syncopal episodes. A split bundle of His deflection was recorded. After the intravenous administration of phentolamine, a marked shortening of the H-H' interval was observed. This signifies an improvement in conduction at the bundle of His level. ...

journal_title：Journal of electrocardiology

authors： Gould L,Reddy CV,Oh KC,Kim SG,Becker W

更新日期：1978-10-01 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：:A 65-year old male originally presented with repetitive ventricular bigeminal sequences demonstrating progressive prolongation of successive coupling intervals suggesting Wenckeback-type exit block. An even number distribution of conducted beats always intervened between bigeminal sequences. Subsequent analysis proved...

journal_title：Journal of electrocardiology

authors： Lightfoot PR

更新日期：1978-10-01 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：:Isolated T wave alternans (TWA) could be consistently induced in 13 dogs by infusion of an acid dextrose solution (ACD) and in nine with a 2% EDTA disodium solution. To study the factors concerned in evoking TWA, serial determinations of total and ionized serum calcium (ICa), Mg, K, pH, pCO2 and pO2 were performed. Ar...

journal_title：Journal of electrocardiology

authors： Navarro-Lopez F,Cinca J,Sanz G,Magriña J,Betriu A

更新日期：1978-04-01 00:00:00

abstract：:Two cases of transient hemiblock occurring during the course of acute myocardial infarction are reported. The transient manifestation permits the accurate evaluation of the diagnostic features of the hemiblocks as modified by acute infarction. One case reflects the development of left bundle branch block due to bilate...

journal_title：Journal of electrocardiology

authors： Schamroth L,Friedberg HD,de Kock J

更新日期：1978-04-01 00:00:00

abstract：:In order to differentiate the vectorcardiogram (VCG) in high posterior infarction (HPI) from VCGs of normal subjects, right ventricular hypertrophy (RVH) and primary myocardial disease (PMD), the following criteria were presented; cases satisfying the criteria could be diagnosed as high posterior infarction. In cases ...

journal_title：Journal of electrocardiology

authors： Suzuki K,Toyama S

更新日期：1978-04-01 00:00:00

abstract：:The long term prognosis was studied in 50 patients treated for the sick sinus syndrome with pacemaker insertion. The mean age of the patients was 71 years. There were 31 females and 19 males in the series. Nine patients (18%) died during the average follow-up period of 19 months. Dizzy and syncopal episodes were aboli...

journal_title：Journal of electrocardiology

authors： Gould L,Reddy CV,Becker WH

更新日期：1978-01-01 00:00:00

abstract：:An electrocardiogram is presented which shows sinus rhythm with alternating Wolff-Parkinson-White (preexcitation) pattern. The frequency of intermittent preexcitation and mechanisms for its production are discussed. ...

journal_title：Journal of electrocardiology

authors： Lichstein E,Goyal S,Chadda K,Gupta PK

更新日期：1978-01-01 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

authors： Fenichel NM,Jimenez FA,Polachek AA

更新日期：1977-07-01 00:00:00

abstract：:The behavior of the sino-atrial mechanism in isorhythmic dissociation (IRD) was studied in 21 patients, nine with spontaneous IRD and 12 with artificially pacemaker-induced IRD following electrode placement for heart block. Successive P-P, R-R and P-R intervals and blood pressure (BP) fluctuations were determined and ...

journal_title：Journal of electrocardiology

authors： Kaplinsky E,Aronson R,Neufeld HN

更新日期：1977-04-01 00:00:00

abstract：:An interpolated premature ventricular contraction (PVC) may produce either complete block of the next sinus impulse or depression of A-V nodal conduction with a prolonged A-H interval. When a PVC results in partial depression of a A-V nodal conduction, the effect on subsequent premature atrial stimuli is unknown. The ...

journal_title：Journal of electrocardiology

authors： Bissett JK,Kane JJ,de Soyza N,McConnell J,Schmitt N

更新日期：1977-01-01 00:00:00

abstract：:The spatial loop of the heart vector can be projected on the Aitoff projection of the globe. The complete information that is contained in the orthogonal leads in displayed on a single graph when the vector magnitudes are indicated by the diameter of circles drawn around the vector projection in short time intervals (...

journal_title：Journal of electrocardiology

authors： Niederberger M,Joskowicz G

更新日期：1977-01-01 00:00:00

abstract：:Frank vectorcardiograms (VCGs) were collected on magnetic tape for 666 normal newborn infants at 1, 6, 12, 24, 36, 48, 60, and 72 hours after birth and analyzed by computers. The final total included 1,337 VCGs for white babies and 413 for blacks. No previous report has been made for the normal neonate with such a lar...

journal_title：Journal of electrocardiology

authors： Guller B,Lau FY,Dunn RA,Pipberger HA,Pipberger HV

更新日期：1977-01-01 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

authors： Brody DA,Mirvis DM,Keller FW,Cox JW,Ideker RE

更新日期：1977-01-01 00:00:00

abstract：:Sinus rhythm tracings, including sinus tachycardia and bradycardia, are characterized quantitatively by means of an ECG measurement program which has been subjected to rigorous evaluation. The analysis is performed on tracings of short duration (10 sec). The features of regularity and stability are considered for the ...

journal_title：Journal of electrocardiology

authors： LeBlanc AR,Nadeau RA,Roberge FA

更新日期：1976-04-01 00:00:00

abstract：:Using standard biopolar, temporary pacing catheters, thresholds were measured in four configurations: (1) bipolar (distal electrode negative, proximal electrode positive); (2) distal unipolar (distal electrode negative, right arm electrode positive); (3) proximal unipolar (proximal electrode negative, right arm electr...

journal_title：Journal of electrocardiology

authors： Preston TA

更新日期：1976-04-01 00:00:00

abstract：:Precordial electrocardiographic leads V1, V2, V5, V6, and limb leads I and II were recorded simultaneously utilizing radio transparent electrodes and wire leads during coronary angiography in 35 patients with obstructive coronary disease and in 17 subjects with normal coronary angiograms. The pattern of electrocardiog...

journal_title：Journal of electrocardiology

authors： McCans JL,Castillo HT,Swanick EJ,Marriott HJ

更新日期：1976-01-01 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：:Frank-lead electrocardiograms (ECGs) were recorded from 59 adult males with suspected coronary artery disease. Three records were recorded consecutively on frequency modulated tape for each patient in (1) supine position, (2) sitting position with arms relaxed, and (3) sitting position on bicycle with arms on bicycle ...

journal_title：Journal of electrocardiology

authors： Shapiro W,Berson AS,Pipberger HV

更新日期：1976-01-01 00:00:00

abstract：:A device has been developed which can be used in conjunction with a direct-writing electrocardiograph to record the high frequency electrocardiogram (ECG) including notches and slurs in the waveform. The device operates on the principle of temporarily storing the QRS complex and then reproducing it at a rate 10 times ...

journal_title：Journal of electrocardiology

authors： Geselowitz DB,Balogh J,Bishop RR

更新日期：1975-07-01 00:00:00

abstract：:His bundle electrograms of 40 patients developing Wenckebach block during atrial pacing and four with spontaneous Wenckebach block above the His were reviewed to determine the frequency of classical Wenckebach periodicity. Thirty patients had 143 Wenckebach cycles that were suitable for analysis. Cycles were evaluated...

journal_title：Journal of electrocardiology

authors： Friedman HS,Gomes JA,Haft JI

更新日期：1975-01-01 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

authors： Rasmussen K

更新日期：1975-01-01 00:00:00

abstract：:A patient who had chronic coarse atrial fibrillation developed severe hyperkalemia accompanied by total loss of fibrillatory waves while an irregularly irregular ventricular rhythm persisted. Correction of hyperkalemia resulted in prompt return of coarse atrial fibrillation. This sequence of events renders strong supp...

journal_title：Journal of electrocardiology

authors： Bashour TT,Cheng TO

更新日期：1975-01-01 00:00:00

abstract：:Extensive experience has been obtained with Medtronic pacemakers, in Glasgow where over 400 patients have received their primary implant. In this review, which covers a period of seven and a half years ending December 31, 1973, the technical reliability of electrode-leads is considered in terms of failed implant lifet...

journal_title：Journal of electrocardiology

authors： Green GD

更新日期：1975-01-01 00:00:00