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

Bradyarrhythmias: AV conduction disturbances.

N M Sokoloff

    Geriatrics
    |August 1, 1985
    PubMed
    Summary

    Atrioventricular (AV) nodal block often presents with a narrow QRS complex and minimal symptoms. In contrast, infranodal block indicates serious heart disease, potentially progressing to complete heart block requiring pacing.

    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

    Plasma norepinephrine in exercise-induced ventricular tachycardia.

    Journal of the American College of Cardiology·1986
    Same author

    Utility of ambulatory electrocardiographic monitoring for predicting recurrence of sustained ventricular tachyarrhythmias in patients receiving amiodarone.

    Journal of the American College of Cardiology·1986
    Same author

    Limitations of failure of procainamide during electrophysiologic testing to predict response to other medical therapy.

    Journal of the American College of Cardiology·1985
    Same author

    Efficacy of combination therapy with mexiletine and a type IA agent for inducible ventricular tachyarrhythmias secondary to coronary artery disease.

    The American journal of cardiology·1985
    Same author

    Electrophysiologic testing in patients at high risk for sudden cardiac death. I. Nonsustained ventricular tachycardia and abnormal ventricular function.

    Journal of the American College of Cardiology·1985
    Same author

    Antiarrhythmic drug efficacy for ventricular tachyarrhythmias associated with coronary artery disease as assessed by electrophysiologic studies.

    The American journal of cardiology·1985

    Area of Science:

    • Cardiology
    • Electrophysiology
    • Internal Medicine

    Background:

    • Conduction abnormalities in the heart can occur at various levels, impacting cardiac function.
    • Atrioventricular (AV) nodal block and infranodal block have distinct clinical presentations and prognoses.

    Purpose of the Study:

    • To differentiate the clinical implications of AV nodal block versus infranodal conduction disturbances.
    • To highlight the prognostic significance of block location in the cardiac conduction system.

    Main Methods:

    • Clinical observation and electrocardiographic (ECG) analysis were used to assess patients with conduction blocks.
    • Correlation of ECG findings with patient symptoms and long-term outcomes was performed.

    Main Results:

    • AV nodal block typically results in a narrow QRS complex and near-normal escape rate, often with minimal patient symptoms.
    • Infranodal block, particularly high-grade Type II block, is associated with chronic disease, a graver prognosis, and a higher likelihood of progressing to complete heart block.

    Conclusions:

    • The location of conduction block is a critical determinant of prognosis and management strategy.
    • Infranodal disease signifies a progressive condition often necessitating permanent cardiac pacing.

    Related Experiment Videos