Latest Research: Why Coffee Causes Some Healthy People’s Hearts to Skip Beats & Sleep Issues

1 year ago
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This video covers a recent study out of the University of California, San Francisco that looked into the negative effects of coffee consumption on Heart Health and Sleep.
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https://food.ndtv.com/food-drinks/calories-in-black-coffee-how-it-helps-to-shed-extra-kilos-1866361

This new study reports that your daily cup or cups of coffee may be a quick pick-me-up, but this pick-me-up comes with a mixed bag of good and not-so-good effects on your health. The researchers say that drinking coffee helps people stay more active, but it also significantly robs some people of sleep. And while coffee doesn't seem to cause irregular rhythms in the upper chamber of the heart, it can cause the lower chambers to skip beats, according to findings presented at the online annual meeting of the American Heart Association.
Lead author Dr. Gregory Marcus, associate Chief of Cardiology for research at the University of California, San Francisco said "People should understand that this extremely commonly consumed beverage really does have substantive effects on our health, and they're variable. It's not that coffee is necessarily all good or all bad. It's very likely that whether it's net good or net bad depends on a combination of factors."
Dr. Sana Al-Khatib, a heart rhythm expert with the Duke Electrophysiology Clinic in North Carolina, who wasn't involved with the study said "A very common question we get almost every week from patients is: Can I drink coffee? Especially in patients with atrial fibrillation." She said on the subject that from previous studies “Results were all over the place" and "It hasn't been easy for us as clinicians to advise patients."
For this clinical trial, Dr. Marcus and his team recruited 100 coffee drinkers and fitted them with several devices to continuously record their health; they were a Fitbit, a heart monitor and a blood glucose tracker. Over the two weeks, participants were randomly assigned on a daily basis to either drink as much coffee as they liked or to abstain. The researchers then tracked the changes for each person, and between people, that occurred when they were either exposed to coffee or went without.
The study found no evidence that coffee consumption created any irregular rhythms within the atria, the upper chambers of the heart. That's good news, since one of the major medical concerns about coffee has been whether it might promote atrial fibrillation, a potentially dangerous condition. But they did find that coffee consumption could cause the ventricles, those are the lower chambers of the heart, to skip beats.
Dr. Marcus said "On days randomly assigned to coffee, people exhibited about 50% more Premature Ventricular Contractions [PVCs] - more early beats arising from the lower chambers of the heart. Those who consumed more than a drink of coffee exhibited essentially a doubling of their PVC counts."
Dr. Gregory Marcus added “These PVCs are common and are usually regarded as harmless. We all have them once in a while, and generally they're considered benign. But we and others have shown that more PVCs are an independent risk factor for heart failure over time. Not everyone with more PVCs has heart failure, but it is a factor."
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