Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Comparative study of the normal vector magnetocardiogram and vector electrocardiogram.

J J Nousiainen, J O Lekkala, J A Malmivuo

    Journal of Electrocardiology
    |July 1, 1986
    PubMed
    Summary

    This study details normal vector magnetocardiography, finding magnetic and electric heart vectors have similar variability. Detector placement errors minimally impact magnetic vector direction due to self-centering effects.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Sensitivity distributions of impedance cardiography using band and spot electrodes analyzed by a three-dimensional computer model.

    Annals of biomedical engineering·1998
    Same author

    The influence of electromagnetic interference and ionizing radiation on cardiac pacemakers.

    Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al]·1990
    Same author

    Corrected unipositional lead system for vector magnetocardiography.

    IEEE transactions on bio-medical engineering·1987
    Same author

    A pressure curve monitor for intratracheal jet ventilation.

    Journal of biomedical engineering·1983
    Same author

    Accurate digital synthesizer for simulating vectorcardiogram.

    Medical & biological engineering & computing·1981
    Same author

    Distribution of m.e.g. detector sensitivity: an application of reciprocity.

    Medical & biological engineering & computing·1980

    Area of Science:

    • Biophysics
    • Cardiology
    • Biomagnetism

    Background:

    • Magnetocardiography (MCG) measures the magnetic fields produced by heart activity.
    • Understanding the normal vector magnetocardiogram and its variations is crucial for diagnostic applications.
    • Simultaneous electrocardiogram (ECG) recordings provide a reference for comparison.

    Purpose of the Study:

    • To describe the normal vector magnetocardiogram and its statistical variation.
    • To analyze the relationship between magnetic and electrical heart vectors.
    • To assess the impact of detector placement on magnetic field measurements.

    Main Methods:

    • Recorded vector magnetocardiograms and Frank vector electrocardiograms from 18 healthy subjects.
    • Utilized a corrected unipositional lead system for magnetic field detection.

    Related Experiment Videos

  • Employed digital computer analysis to calculate mean values and standard errors for magnetic QRS and T waves.

    • Main Results:

    • Interindividual variability of normal magnetic and electric heart vectors was comparable.
    • Detector placement inaccuracy at the fourth intercostal space caused minimal error in magnetic vector direction.
    • The magnetic heart vector exhibited greater sensitivity to the terminal phase of ventricular depolarization compared to the electrical vector.

    Conclusions:

    • The self-centering effect of lead fields minimizes directional errors from detector placement.
    • The magnetic heart vector provides unique insights into cardiac electrical activity, particularly late depolarization phases.
    • MCG and ECG offer complementary information regarding cardiac electrophysiology.