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

[Dynamics of the QT interval].

Mikiko Nakagawa1, Tetsunori Saikawa

  • 1Department of Laboratory Medicine, Oita Medical School.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|July 26, 2002
PubMed
Summary

Assessing dynamic changes in the QT interval and QT dispersion offers crucial insights into ventricular arrhythmia risk. Understanding these dynamic behaviors, despite technical challenges, can help identify patients susceptible to dangerous heart rhythms.

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

Higher Cholesterol Absorption Marker at Baseline Predicts Fewer Cardiovascular Events in Elderly Patients Receiving Hypercholesterolemia Treatment: The KEEP Study.

Journal of the American Heart Association·2024
Same author

R-R' interval in the left bundle branch block predicts long-term outcomes after cardiac resynchronization therapy by estimating greater mechanical dyssynchrony and viable myocardium.

Heart rhythm·2023
Same author

Innovations in online classes introduced during the COVID-19 pandemic and their educational outcomes in Japan.

BMC medical education·2023
Same author

Role of polyunsaturated fatty acids in Japanese patients with coronary spastic angina.

Journal of cardiology·2023
Same author

Association between interatrial septum adiposity and atrial fibrillation: transesophageal echocardiography imaging and autopsy study.

Scientific reports·2023
Same author

Vagal response is involved in the occurrence of ventricular fibrillation in patients with early repolarization syndrome.

Heart rhythm·2023

Area of Science:

  • Cardiology
  • Electrophysiology
  • Computational Biology

Context:

  • Ventricular repolarization abnormalities are linked to malignant ventricular arrhythmias.
  • QT interval and dispersion are influenced by heart rate, autonomic tone, gender, age, electrolytes, and drugs.
  • Dynamic behaviors of QT interval and dispersion, like beat-to-beat fluctuations and diurnal variations, are altered in pathophysiological conditions.

Purpose:

  • To explore the significance of spatial and temporal inhomogeneity in ventricular repolarization.
  • To investigate the dynamic behavior of the QT interval and QT dispersion.
  • To assess the potential of QT dynamicity assessment in identifying patients at risk for ventricular arrhythmias.

Summary:

  • Spatial and temporal inhomogeneity of ventricular repolarization is associated with increased susceptibility to malignant ventricular arrhythmias.
  • QT interval and dispersion exhibit dynamic changes influenced by multiple physiological and external factors.
  • Altered dynamic patterns in QT interval and dispersion are observed in abnormal pathophysiological states.
  • Assessing QT dynamicity, though technically challenging, may provide vital information for risk stratification.

Impact:

  • Highlights the clinical relevance of QT interval and dispersion dynamics in arrhythmia prediction.
  • Suggests that advanced analysis of repolarization variability could improve patient risk assessment.
  • Emphasizes the need for further research into the technical aspects and clinical application of QT dynamicity assessment.

Related Experiment Videos