Andrey Ardashev, an arrhythmologist, professor of the Medical Scientific and Educational Center of Lomonosov Moscow State University, called a useful dose of coffee.

The Russian specialist said:” In reasonable amounts, coffee does not affect the rhythm of the heart. It is known that the development of arrhythmia is caused by factors affecting the myocardium at the cellular level, impairing the interaction of cardiomyocytes with each other, and as a consequence, impairing the electrical conductivity of the heart tissue. Among such risk factors for arrhythmias: hypertension, atherosclerosis, coronary heart disease,myocardial infarction, inflammation of the heart muscle (myocarditis), surgery, but not coffee”.

For twelve years, scientists from the Karolinska Institute (Sweden) conducted a study involving about 80 thousand people, as a result of which it was found that coffee and products containing caffeine do not lead to an increase in the number of newly arisen arrhythmias.

According to the expert, even large doses of caffeine did not affect the health of both those study participants who already suffered from arrhythmia and those who were diagnosed with it during the 12-year follow-up period.

Coffee is a complex mixture of more than 150 chemicals. It contains alkaloids, organic acids, tannins, amino acids and many other substances, each of which affects the body.

For example, antioxidants and phenols reduce inflammation, and as a result, they can prevent the development of cancer, as well as reduce insulin resistance, which means they have an antidiabetic effect, explains Ardashev.

But the main positive effect of coffee is that it “helps to cheer up and concentrate”, this is due to the fact that the molecular structure of caffeine resembles the neurotransmitter adenosine. Therefore, caffeine binds to adenosine receptors in the brain and, as a result, reduces the effects of this mediator.

This confirms the well-known scientific fact that “the point of application of the action of caffeine, the target organ is the brain, but not the heart,” says the doctor.

“In moderate doses (from 40 to 300 mg), caffeine can counteract the effects of adenosine, that is, reduce fatigue and increase alertness. At the same time, as in the case of other products, the main thing is to know the measure and not exceed the daily norm,” the arrhythmologist notes.

According to WHO, the permissible amount of caffeine (not coffee) is 300-400 ml per day, which corresponds to about two cups of coffee beans. It should be remembered that caffeine is found not only in coffee, but also in other products, the doctor points out.

“The well-known cardiac effects of coffee, familiar to everyone— are an increase in heart rate, and in rare cases a change in blood pressure or even a feeling of an irregular heartbeat, frightening some fans of this drink, are rather mediated and realized on the heart through exposure to the central nervous system.

Such effects are rather a reflection of the quality of the drink consumed, which may consist in different proportions of different varieties, including grains of low-quality weed origin,” the agency interlocutor believes. The direct effect on the heart cells of the above-mentioned chemical components of coffee is not proven, Ardashev summarizes.

source :

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