If coffee owes part of its success to its stimulating properties, is it then dangerous? for heart rate ? Indeed, some consumers evoke palpitations or abnormalities of the heart rhythm after taking this “stimulant”. But a new study on the subject is reassuring and emphasizes that in the majority of cases, there is no relationship between the occurrence of arrhythmia attacks and coffee intake. Published in the journal “JAMA Internal Medicine”, this shows that most people can benefit of their morning coffee worry-free because caffeine does not appear to increase the risk of arrhythmia in most consumers.
“We see no evidence of this general recommendation to avoid coffee. Says study co-author Dr. Gregory Marcus of the University of California at San Francisco. “There might be some individuals for whom caffeine is a trigger, but I think there’s a growing body of evidence that these cases are actually quite rare. “. The scientific team even discovered that each additional cup of coffee that a person drinks daily could reduce their risk of arrhythmia by about 3% on average. “There may be some people for whom caffeine or coffee can actually help reduce their risk. He adds.
What is the relationship between caffeine and heart health?
To determine if caffeine can really cause increased heart rate or an abnormal heartbeat, the researchers analyzed data from more than 386,000 people participating in a long-term British health study, asked about their coffee consumption. Of these, approximately 17,000 developed a heart rhythm problem during an average follow-up of 4.5 years. Result: there was no link between the consumption of caffeine and the occurrence heart rhythm disturbances, even when researchers took into account genetic factors that might influence how individuals metabolize caffeine.
“We could not find any evidence at the population level that those who consumed more coffee or those who were exposed to more caffeine had an increased risk of arrhythmia. The results of the study show that there is an unfounded dogma that coffee can cause arrhythmias. “, Add the researchers. The latter, on the other hand, are more mixed when it comes to their finding on the potential protective benefits of coffee, given that the effect was very weak: if the coffee can do not cause arrhythmias, it does not protect against it either. Importantly, more studies are needed to determine how it affects the heart.
Among the hypotheses raised, the fact that coffee has anti-inflammatory effects, and that it is well known that inflammation contributes heart rhythm problems. Caffeine may also cause some people to be more active, as physical activity can reduce the risk of arrhythmias. “We are probably not fully aware of the mechanisms that may be relevant to the relationship between caffeine and heart health. »Notes the scientific team. What to encourage to experiment with this drink, even if the researchers wish to recall that some people do not respond well to coffee and that their concerns must continue to be taken seriously. This is then a personalized discussion between the patient and his doctor.