“Coffee does not affect heart rhythm”

delivery time2023-03-27 08:56


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(Seoul = Yonhap News) Reporter Han Seong-gan = A study has found that there is little chance of an increase in premature atrial contractions (PAC) when drinking coffee.

Atrial premature contraction refers to an irregular heart rhythm caused by premature beats that occur in the upper part of the heart, the atria.

When electricity is generated in the atria earlier than the expected beat formation point, causing a beat, it can feel unstable, but is a normal phenomenon for a healthy heart. Some people feel like skipping one heartbeat or adding one heartbeat.

A research team led by Professor Gregory Marcus, a cardiologist at the University of California, San Francisco, USA, conducted an experiment on 100 healthy coffee drinkers to see how irregular the heart beats when drinking coffee, and found this fact, HealthDay News. ) was reported on the 25th.

Most of them were drinkers of at least one cup of coffee a day.

The research team consumed caffeinated coffee on some days and decaffeinated on other days for two weeks. They were asked to wear an electrocardiogram (ECG) piece that records the heart’s electrical activity at all times.

As a result, the number of premature heart contractions was 58 on the day they drank caffeinated coffee, and 53 on the day they did not consume caffeine.

Frequent occurrences of these premature atrial contractions in older adults can lead to atrial fibrillation, a common type of arrhythmia.

Atrial fibrillation is a condition where the atria contract very rapidly from time to time, causing the heart to quiver like jelly in a bowl, causing the heart rate to soar to over 100 beats per minute.

When atrial fibrillation occurs in the left atrium, blood can pool and form a blood clot. This blood clot is carried into the bloodstream through the left ventricle, which pumps blood throughout the body, and travels around, blocking a blood vessel in the brain, leading to a stroke.

However, the number of premature ventricular contractions (PVC) was slightly higher on days when coffee was consumed than on days when caffeine was not consumed.

The number of premature ventricular contractions was 154 on the day they drank caffeinated coffee, and 102 on the day they did not consume caffeine.

Premature ventricular contractions are premature contractions in the lower chambers of the heart from time to time, which increase the risk of heart failure.

Regarding this, Professor David Kao, a cardiologist at the University of Colorado College of Medicine, found that the number of heartbeats per day is around 100,000.

In addition, the day when they drank caffeinated coffee had a slightly higher level of physical activity. On days when coffee was consumed, the average number of steps taken per day was 10,646, and on caffeine-free days, it was 9,665 steps. The number of steps was measured with the Fitbit, a smart watch worn on the wrist.

In addition, the average sleep time per day on the day when caffeine was consumed was 397 minutes, 35 minutes shorter than the 432 minutes on the day when caffeine was not consumed.

The overall results suggest that coffee drinkers need to adjust the amount of coffee according to their preference, the research team explained.

For example, if you have trouble sleeping, limit your coffee to morning coffee, and if you need to move your body and be active, drink coffee an hour before.

If you are worried about changes in your heart rate when you drink coffee, the researchers suggest that you need to look at what happens when you abstain from coffee.

The results of the study were published in the latest issue of the New England Journal of Medicine, an American medical journal.

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