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Coffee, tea is not necessarily dangerous for the heart rhythm



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  • This morning, the cup of coffee or espresso is not only safe for people with atrial fibrillation (AFIB) and other cardiac arrhythmias, but can also reduce the arrhythmia.
  • The authors concluded that they should be avoided by patients with pre-existing heart disease.

This morning, a cup of coffee or an espresso drink is sure to have other cardiac arrhythmias, not just for people with atrial fibrillation (AFIB) and atrial fibrillation, it can only reduce arrhythmia frequency, Australian researchers reported.

Based on a comprehensive review of studies investigating the influence of caffeine-containing beverages on heart rhythm, there was no evidence that drinking moderate amounts of coffee or tea afib and ventricular arrhythmias, according to Peter Kistler, MBBS, PhD, of Alfred Heart Center in Melbourne, and colleagues.

Coffee and tea consumption were associated In most studies with a reduced number of arrhythmia episodes, a large meta-analysis showed a 6% reduction in Afib frequency among normal coffee drinkers and a 1

3% reduction in AFib risk, they wrote in JACC (19659005) On the other hand, it was noted that drinking energy drinks is a potential inducer of arrhythmias, and the authors concluded that they should be avoided by patients with pre-existing cardiac conditions.

Energy drinks typically contain far more caffeine than coffee, up to 500 mg per drink. Three-quarters of patients with pre-existing heart disease in a study who consumed two or more energy drinks per day reported palpitations within 24 hours.

A single cup of coffee contains around 95 mg of caffeine and one shot of espresso 65 mg

"There is a public perception that is often based on anecdotal experiences that caffeine is a common acute trigger for cardiac arrhythmia problems," Kistler noted in one written press release. "Our comprehensive review of the medical literature suggests that this is not the case."

Researchers identified studies through studies from Medline, PubMed, EMBASE, and Web of Science to investigate the effects of coffee, tea, and energy drinks. Key words included caffeine, coffee, tea, and energy drinks in combination with arrhythmias, atrial fibrillation, sudden death, ectopic, and ventricular arrhythmias. [19659005] Your analysis showed a consistent response Decrease in Afib associated with coffee and tea and little effect on ventricular arrhythmias.

Kistler's group identified 11 studies of caffeine and Afib with nearly 361,000 participants.

They reported that in a In the population-based cohort study of 2016, higher coffee intake was associated with a lower rate of incident Afib. Compared with non-drinkers were two to three cups of coffee per day (odds ratio 0.86, 95% CI, 0.71 to 1.04) and six to seven cups per day (OR 0.79, 95% CI, 0.64 to 0.98) both associated with lower afib.

Also in a case-control study 2016 (dose-dependent multivariate OR 0.349, 95% CI, 0.25 to 0.48), green tea consumption was associated with lower AFib ( P = 0.00

1 for trend). In a population cohort study reported in 2015, there was no association between coffee consumption and infection risk at all consumption levels (multivariate RR 0.98 for 2-3 cups / day, RR 1.01 for ≥ 5 cups / day; P = 0.64 for trend)

In a retrospective cohort study from 2011, higher coffee intake was associated with lower hospitalization rates (HR: 0.81, 95% CI, 0.69 to 0.96 for ≥4 cups) /day).

Caffeine doses up to 500 mg daily (the equivalent of six cups of coffee) were not found to increase the severity or rate of ventricular arrhythmias.

In a randomized trial in 2016 that included 103 heart attacks survivors, regular caffeine intake (mean 353 mg / day) was associated with improved heart rate variability, increased parasympathetic activity, and no significant increase in arrhythmias compared to controls.

The researchers found that recent large epidemiological studies suggest that regular caffeine drinkers have lower levels of cardiovascular and all-cause mortality.

"Large population-based studies and randomized controlled trials suggest that coffee and tea are safe and may even reduce the incidence of arrhythmias, and although there is no well-defined threshold for caffeine damage, a regular intake of up to 300 mg / Day, and could even protect against cardiac arrhythmia, "they concluded.

The study was funded by the Government of Victoria Operational Infrastructure Funding

Kistler and coauthors revealed no relevant relationships with industry.

Two co-authors provided scholarships from the National Health and Medical Research Council (NHMRC), the National Heart Foundation, and Baker IDI Bright Sparks.

  • Reviewed by
    Robert Jasmer, MD Associate Clinical Professor of Medicine, University of California, San Francisco and Dorothy Caputo, MA, BSN, RN, Nurse Planner

2018-04-17T12: 30: 00-0400


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