Arrhythmogenic foods - A growing medical problem
1University of Arizona, College of Medicine-Phoenix, AZCERT, Inc, Tucson, Arizona USA.
Trends in Cardiovascular Medicine
|September 4, 2019
Summary
Certain foods like grapefruit juice and energy drinks can prolong the QTc interval, posing a risk for arrhythmias, especially in patients with congenital long QT syndrome (cLQTS). Further research is needed to identify other at-risk populations and ensure food product safety.
Area of Science:
- Cardiology
- Clinical Pharmacology
- Dietary Science
Background:
- Dietary components are recognized as rare causes of arrhythmias.
- Anecdotal evidence suggested grapefruit juice and energy drinks may cause arrhythmias, particularly in congenital long QT syndrome (cLQTS).
Purpose of the Study:
- To investigate the arrhythmogenic potential of common dietary ingredients.
- To assess the risk of QTc interval prolongation in patients with cLQTS.
Main Methods:
- Utilized the industry-standard "thorough QT" trial design.
- Evaluated the effects of grapefruit juice and energy drinks on QTc interval.
Main Results:
- Confirmed that grapefruit juice and some energy drinks prolong the QTc interval.
- Observed QTc prolongation exceeding 500 msec in some patients with cLQTS, indicating imminent danger.
Conclusions:
- Grapefruit juice and energy drinks pose a significant risk for arrhythmias, especially in individuals with cLQTS.
- Patients with risk factors for torsades de pointes (TdP) may also be susceptible.
- Urgent research is required to evaluate food product safety and warn vulnerable populations.
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