Micro-processor synthesis and analysis of the polarcardiogram.

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 automatic recorder function at specified intervals during electrocardiographic exercise stress testing. Polarcardiographic variables such as magnitude, longitude and latitude at particular temporal points are calculated and values displayed by the micro-processor. The configuration provides an economical, accurate and reliable alternative to larger systems and may easily be adapted to other applications.

journal_name

J Electrocardiol

authors

Grant ME,Hanson JS

doi

10.1016/s0022-0736(82)80047-2

subject

Has Abstract

pub_date

1982-01-01 00:00:00

pages

69-76

issue

1

eissn

0022-0736

issn

1532-8430

journal_volume

15

pub_type

杂志文章
  • Catheter ablation of atrial fibrillation in patients with concomitant sinus bradycardia-Insights from the German Ablation Registry.

    abstract:AIMS:This investigation addresses procedural characteristics of catheter ablation in patients with atrial fibrillation (AF) and sinus bradycardia. METHODS:From the prospective, multi-center German Ablation Registry 1073 patients with sinus rhythm at the time of AF ablation were divided into two groups according to hea...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章,多中心研究

    doi:10.1016/j.jelectrocard.2015.12.007

    authors: Zylla MM,Brachmann J,Lewalter T,Hoffmann E,Kuck KH,Andresen D,Willems S,Hochadel M,Senges J,Katus HA,Thomas D

    更新日期:2016-03-01 00:00:00

  • Transient left posterior hemiblock during myocardial ischemia-eliciting exercise treadmill testing: a report of a case and a critical analysis of the literature.

    abstract::We describe a 75-year-old male patient with two-vessel coronary artery disease, who developed transient left posterior hemiblock (LPH) while undergoing an exercise treadmill test (ETT). The intraventricular conduction abnormality initially had the features of alternating LPH, which evolved to stable LPH prior to dissi...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章,评审

    doi:10.1016/s0022-0736(99)90022-5

    authors: Madias JE,Knez P

    更新日期:1999-01-01 00:00:00

  • Dilated cardiomyopathy: utility of the transverse: frontal plane QRS voltage ratio.

    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

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(85)80032-7

    authors: Goldberger AL,Dresselhaus T,Bhargava V

    更新日期:1985-01-01 00:00:00

  • Clinical alarm hazards: a "top ten" health technology safety concern.

    abstract::For the past several years ECRI Institute has published a list of Top Ten Health Technology Hazards. This list is based on ECRI's extensive research in health technology safety and on data provided to its problemreporting systems. For every year that the Top Ten list has been published, Alarm Hazards have been at or n...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章,评审

    doi:10.1016/j.jelectrocard.2012.08.050

    authors: Keller JP Jr

    更新日期:2012-11-01 00:00:00

  • Electromechanical mapping with MRI tagging and epicardial sock electrodes.

    abstract::Methods currently exist for the precise measurement of local three-dimensional myocardial motion noninvasivly with magnetic resonace imaging tagging. From these motion estimates, strain images representing the local deformation of the myocardium can be formed to show local myocardial contraction. These images clearly ...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1054/jelc.2002.37156

    authors: McVeigh E,Faris O,Ennis D,Helm P,Evans F

    更新日期:2002-01-01 00:00:00

  • Impact of number of co-existing rotors and inter-electrode distance on accuracy of rotor localization.

    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

    authors: Aronis KN,Ashikaga H

    更新日期:2018-01-01 00:00:00

  • Time-domain and frequency-domain analyses of the signal-averaged ECG in patients with sustained ventricular tachyarrhythmia and nonischemic heart diseases.

    abstract::Signal-averaged electrocardiogram (ECG) variables were analyzed in 81 patients with ventricular tachyarrhythmia and nonischemic heart disease using the ART LVP 101 EPX system (Austin, TX): 15 ventricular tachycardia patients with arrhythmogenic right ventricular dysplasia (ARVD), 7 ventricular tachycardia patients wit...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(94)80091-x

    authors: Aihara N,Ohe T,Shimomura K

    更新日期:1994-01-01 00:00:00

  • A paucity of chronic electrocardiographic changes with adriamycin therapy.

    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

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

    更新日期:1978-07-01 00:00:00

  • Isomagnetic maps in right ventricular overloading.

    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

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(88)80013-x

    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

  • Critical evaluation of the twin peaked P wave ("pseudo-P mitrale") in orthogonal electrocardiograms.

    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

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(80)80051-3

    authors: Ishikawa K,Pipberger HV

    更新日期:1980-04-01 00:00:00

  • Body surface potential mapping investigating the ventricular activation patterns in the cardiac resynchronization of patients with left bundle-branch block and heart failure.

    abstract::Body surface potential mapping assessed mean cardiac electrical activation times displayed by isochronal maps in the right ventricle (RV; right ventricle mean activation time [mRV]), anterior septal area (anterior septal area mean activation time [mAS]), and left ventricle (left ventricle mean activation time [mLV]) o...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/j.jelectrocard.2005.07.004

    authors: Pastore CA,Tobias N,Samesima N,Filho MM,Pedrosa A,Nishioka S,Douglas RA,Moreira LF,Ramires JF

    更新日期:2006-01-01 00:00:00

  • Application of the Karhunen-Loeve expansion to evaluate regional cardiac excitation in body surface potential maps.

    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

    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

  • Performance of seven ECG interpretation programs in identifying arrhythmia and acute cardiovascular syndrome.

    abstract:BACKGROUND:No direct comparison of current electrocardiogram (ECG) interpretation programs exists. OBJECTIVE:Assess the accuracy of ECG interpretation programs in detecting abnormal rhythms and flagging for priority review records with alterations secondary to acute coronary syndrome (ACS). METHODS:More than 2,000 di...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/j.jelectrocard.2019.11.043

    authors: De Bie J,Martignani C,Massaro G,Diemberger I

    更新日期:2020-01-01 00:00:00

  • Long-term favorable cardiovascular risk profile and 39-year development of major and minor electrocardiographic abnormalities - The Chicago Healthy Aging Study (CHAS).

    abstract:BACKGROUND:Data are limited on long-term associations of favorable cardiovascular risk profile (i.e., low-risk) and changes in risk profile with ECG abnormality development. METHODS:The Chicago Healthy Aging Study (CHAS) involved re-examination of 1395 participants, ages 65-84 years in 2007-10, free of baseline major ...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/j.jelectrocard.2018.06.015

    authors: Vu TT,Daviglus ML,Liu K,Allen NB,Garside DB,Lloyd-Jones DM

    更新日期:2018-01-01 00:00:00

  • Prime number variant of concealed trigeminy.

    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

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(85)80024-8

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

    更新日期:1985-10-01 00:00:00

  • Asymptomatic coronary artery disease detection: update 1996. A screening protocol using 16-lead high-resolution ECG, ultrafast CT, exercise testing, and radionuclear imaging.

    abstract::The authors have proposed a new four-step screening algorithm to detect asymptomatic coronary artery disease (CAD) in flight school candidates, cadets, and rated flyers of the Unites States Air Force (USAF). In step 1, the USAF Armstrong Laboratory (USAF/AL) risk profile and improved 16-lead high-resolution electrocar...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章,评审

    doi:10.1016/s0022-0736(96)80043-4

    authors: Selvester RH,Ahmed J,Tolan GD

    更新日期:1996-01-01 00:00:00

  • Performance of an automated real-time ST-segment analysis program to detect coronary occlusion and reperfusion.

    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

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(96)80090-2

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

    更新日期:1996-10-01 00:00:00

  • Ventricular ectopic beats with exit block: a retrospective Holter monitor study.

    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

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(83)80017-x

    authors: Anderson GJ,Greenspan M

    更新日期:1983-04-01 00:00:00

  • Ordinal discrimination of ECG orthogonal features.

    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

    pub_type: 杂志文章

    doi:

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

    更新日期:1987-10-01 00:00:00

  • Fractal mechanisms and heart rate dynamics. Long-range correlations and their breakdown with disease.

    abstract::Under healthy conditions, the normal cardiac (sinus) interbeat interval fluctuates in a complex manner. Quantitative analysis using techniques adapted from statistical physics reveals the presence of long-range power-law correlations extending over thousands of heartbeats. This scale-invariant (fractal) behavior sugge...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(95)80017-4

    authors: Peng CK,Havlin S,Hausdorff JM,Mietus JE,Stanley HE,Goldberger AL

    更新日期:1995-01-01 00:00:00

  • Importance of hepatitis C coinfection in the development of QT prolongation in HIV-infected patients.

    abstract:BACKGROUND:Case reports and unblinded studies suggest that human immunodeficiency virus (HIV) disease is associated with QT prolongation and torsade de pointes ventricular tachycardia. Hepatitis C coinfection is common in patients with HIV disease, and cirrhosis is also associated with QT prolongation. We therefore und...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/j.jelectrocard.2005.09.001

    authors: Nordin C,Kohli A,Beca S,Zaharia V,Grant T,Leider J,Marantz P

    更新日期:2006-04-01 00:00:00

  • Effect of pacing drive cycle length on induction of sustained monomorphic ventricular tachycardia.

    abstract::To assess the effect of pacing drive cycle length on induction of sustained monomorphic ventricular tachycardia, 40 patients were prospectively studied in the drug-free state. Ventricular extrastimuli were sequentially delivered at the same coupling interval at each of three drive cycle lengths (600, 500, and 400 ms) ...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/0022-0736(92)90127-l

    authors: Mann DE,Florek RC,Reiter MJ

    更新日期:1992-01-01 00:00:00

  • An algorithm for the differentiation of the infarct territory in difficult to discern electrocardiograms.

    abstract:BACKGROUND:In a minority of the patients presenting with ST-segment elevation (STE) myocardial infarction (MI), electrocardiogram (ECG) may show a balanced STE in both anterior and inferior lead groups and may cause diagnostic confusion about involved myocardial territory. In this study, we sought ECG clues which may f...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/j.jelectrocard.2018.09.006

    authors: Bozbeyoğlu E,Aslanger E,Yıldırımtürk Ö,Şimşek B,Karabay CY,Türer A,Kozan Ö,Değertekin M

    更新日期:2018-01-01 00:00:00

  • ST-deviation reconstruction in missing leads on the 12-lead ECG: applicability in studies on ST-segment resolution during thrombolysis.

    abstract::Quantitative analysis of ST-segment deviations (STdev) and their resolution by treatment (STR; calculated from a combined sum of STdev in multiple leads) are used in trials on reperfusion for myocardial infarction (MI). Unreadable or unavailable electrocardiogram (ECG) leads are a common reason for exclusion, decreasi...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(03)00030-x

    authors: Kaluzay J,Vandenberghe K,Fontaine D,Herbots L,Anné W,Van de Werf F,Heidbüchel H

    更新日期:2003-07-01 00:00:00

  • Pre-hospital evaluation of electrocardiographic grade 3 ischemia predicts infarct progression and final infarct size in ST elevation myocardial infarction patients treated with primary percutaneous coronary intervention.

    abstract:BACKGROUND:In STEMI, grade-3 ischemia (G3) on admission ECG predicts larger infarct size (IS) than grade-2 (G2). We evaluated whether pre-hospital G3 and its temporal behavior are associated with IS and salvage after pPCI. METHODS:In 401 STEMI patients, pre-hospital and pre-PCI ECGs were classified as G3 or G2. IS was...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章,随机对照试验

    doi:10.1016/j.jelectrocard.2014.04.012

    authors: Ringborn M,Birnbaum Y,Nielsen SS,Kaltoft AK,Bøtker HE,Pahlm O,Wagner GS,Platonov PG,Terkelsen CJ

    更新日期:2014-07-01 00:00:00

  • Intra-QRS high-frequency ECG changes with ischemia. Is it possible to evaluate these changes using the signal-averaged Holter ECG in dogs?

    abstract::The purpose of this experiment is to study the possibility of intra-QRS high-frequency electrocardiographic (HFECG) changes for the evaluation of and recovery from myocardial ischemia in both the time-domain and spectral-turbulence analyses on the signal-averaged ECG using the Holter ECG monitoring (Holter SAECG) syst...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(95)80064-6

    authors: Yakubo S,Ozawa Y,Komaki K

    更新日期:1995-01-01 00:00:00

  • Electrocardiographic changes of ST-elevation myocardial infarction in patients with complete occlusion of the left main trunk without collateral circulation: differential diagnosis and clinical considerations.

    abstract::Acute coronary syndromes due to involvement of the left main trunk usually present with subtotal occlusion and electrocardiographic pattern with predominant ST depression (non-ST-elevation myocardial infarction). The cases with complete occlusion frequently present an ST-elevation myocardial infarction pattern, but th...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/j.jelectrocard.2012.05.001

    authors: Fiol M,Carrillo A,Rodríguez A,Pascual M,Bethencourt A,Bayés de Luna A

    更新日期:2012-09-01 00:00:00

  • Atrial flutter vector loops derived from the surface ECG: does the plane of the loop correspond anatomically to the macroreentrant circuit?

    abstract::We hypothesized that if the right atrial circuit during isthmus dependent atrial flutter provides the dominant contribution to the surface electrocardiogram (ECG), the three-dimensional vector loop of the flutter waves would primarily be in a plane approximately parallel to the tricuspid ring. Twenty vectorcardiograms...

    journal_title:Journal of electrocardiology

    pub_type: 杂志文章

    doi:10.1016/j.jelectrocard.2003.09.055

    authors: Ng J,Sahakian AV,Fisher WG,Swiryn S

    更新日期:2003-01-01 00:00:00

  • Influence of right ventricular site of stimulation and infarct location on the inducibility of ventricular tachycardia in patients with coronary artery disease.

    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

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(98)90012-7

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

    更新日期:1998-10-01 00:00:00

  • A device for producing high frequency electrocardiograms on a conventional direct writing electrocardiograph.

    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

    pub_type: 杂志文章

    doi:10.1016/s0022-0736(75)80054-9

    authors: Geselowitz DB,Balogh J,Bishop RR

    更新日期:1975-07-01 00:00:00