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

High dose caffeine and ventricular arrhythmias.

M G Myers1, L Harris

  • 1Division of Cardiology, Sunnybrook Medical Centre, Toronto, Ontario.

The Canadian Journal of Cardiology
|April 1, 1990
PubMed
Summary

High-dose caffeine (450 mg) did not increase ventricular arrhythmias in patients recovering from myocardial infarction. This study found similar rates of ventricular ectopy between caffeine and placebo groups, suggesting moderate doses are safe.

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

Successful treatment of pulmonary melioidosis in an Australian dog.

Australian veterinary journal·2026
Same author

Review of the first 5 years of dedicated FDG PET/CT for Cardiac Inflammation.

Irish medical journal·2025
Same author

Environmental considerations for the decommissioning of subsea cables.

Journal of environmental management·2025
Same author

Halting the progression of chronic kidney disease: an audit of the use of RAASi and SGLT2i.

Irish medical journal·2025
Same author

Toronto ACHD program: A 65 year legacy.

International journal of cardiology. Congenital heart disease·2025
Same author

Use of real-time electronic extremity dosimeters for monitoring and optimisation of radiopharmacy technique.

Journal of radiological protection : official journal of the Society for Radiological Protection·2024

Area of Science:

  • Cardiology
  • Pharmacology

Background:

  • Recent myocardial infarction (MI) patients are at risk for ventricular arrhythmias.
  • Caffeine's pro-arrhythmic effects are a concern in cardiac patients.

Purpose of the Study:

  • To investigate the effect of high-dose caffeine on ventricular arrhythmias in patients with recent MI.

Main Methods:

  • A randomized, double-blind, placebo-controlled study.
  • 35 patients with recent MI received 450 mg caffeine or placebo on separate days.
  • 8-hour continuous Holter electrocardiographic monitoring was performed.

Main Results:

  • Caffeine did not increase the frequency or complexity of ventricular ectopy.
  • Ventricular arrhythmias occurred in 19/35 patients after caffeine versus 24/35 after placebo.
  • Serious ventricular ectopic activity (couplets, tachycardia) was similar between groups.

Conclusions:

  • Moderately high doses of caffeine do not appear to increase ventricular arrhythmias in patients with ischemic heart disease.
  • Caffeine may be safely used in this patient population at the doses studied.

Related Experiment Videos