Frequent sleep can be a sign of high risk of stroke and hypertension

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Recent studies have shown that frequent sleep may increase the risk of high blood pressure and stroke. Michela Ravasio/Stoxy
  • Chinese scientists have found that frequent sleep may increase the risk of high blood pressure and stroke.
  • Studies show that people who don’t sleep sometimes or often have a higher risk of hypertension and stroke than people who don’t sleep at all.
  • Sleep itself is not the problem, but it can be a sign of underlying health problems, researchers say.

According to a new study by scientists in China, frequent naps can lead to high blood pressure and stroke.

A study published in HypertensionThe journal, published by the American Heart Association, is the first to look at whether frequent sleep deprivation is associated with high blood pressure and stroke, using observational analyzes of participants over time. The researchers combined this approach Mendelian randomizationwhere scientists use genetic markers to study whether a risk factor can cause a particular disease.

Previous studies on this link have yielded conflicting findings. For example, this 2017 study found that daytime sleepiness was associated with a higher risk of hypertension. Reading 2019 Napping during the day may be protective against hypertension.

For observational analysis, researchers analyze the data UK Biobank. The study recorded genetic and health data on more than 500,000 participants aged 40-69 living in the UK between 2006 and 2010.

Participants with hypertension or stroke at baseline were excluded from the results. Finally, researchers looked at 358,451 participants and examined the relationship between sleep frequency and first-time reports of stroke or high blood pressure. The researchers divided the participants into groups based on the frequency of naps: usually, sometimes, and never/rarely.

Among them: 50,507 patients with hypertension, and 4,333 with stroke, 11.16 years.

In a prospective observational analysis, the researchers found that participants who slept more during the day were male, older, non-European, had less education, lower income, higher body mass index, waist-to-hip ratio and Townsend deprivation index (an indicator of material deprivation). These frequent sleepers were more likely to suffer from poorer overall health, as well as sleep problems such as sleeping longer and snoring.

After adjusting for risk factors, the researchers found that occasional sleepers had a 7% increased risk of hypertension, a 12% increased risk of stroke, and a 12% increased risk of ischemic stroke (the most common type of stroke caused by blood clots). and oxygen to one area of ​​the brain) by 9% compared to people who never slept. The study found that people who did not sleep regularly had a 12% increased risk of hypertension, a 24% increased risk of stroke, and a 20% increased risk of ischemic stroke.

Study participants younger than 60 years of age and regular sleepers were 20% more likely to develop hypertension compared to people of the same age group who did not sleep at all. For participants older than 60 years, participants who did not sleep regularly had a 10% increased chance of developing hypertension compared to people of the same age group who never slept.

Mendelian randomization showed that frequent sleep is a potential risk factor for the development of primary hypertension. The researchers did not find an association between daytime sleep frequency and stroke with Mendelian randomization.

Using Mendelian randomization, the researchers found that the risk of developing high blood pressure increased by 40% if a participant changed by one category (from never sleeping to sometimes sleeping or from sometimes sleeping to normal sleep).

The researchers combined the results of a prospective cohort and Mendelian randomization for a comprehensive study. Converging evidence from different research methods suggests that high sleep frequencies may be a risk factor for hypertension and stroke.

The researchers list several limitations of the study, including that only the frequency, not the duration, of naps was considered. In addition, Dr. E. Wang, the author of the study and a professor and chair of the Department of Anesthesiology, Central South University, Xiangya Hospital. Medical news today In an email, UK Biobank participants were a fairly homogenous group. The participants, Wang wrote, were “predominantly middle-aged Europeans” and they “may not generalize to other racial groups.”

The biological mechanism of why sleep affects blood pressure or stroke needs further understanding and further research, Wang wrote. MNT.

Experts believe that quality sleep is a key component of good health. The American Heart Association recently added sleep duration eight key indicators for optimal heart and brain health.

This study found that daytime sleepiness may be associated with an increased risk of high blood pressure and hypertension, but a number of other studies, e.g. this is from 2021 onwards, suggest that napping during the day improves cognitive performance. “Whether sleep is good for health is debatable,” says Dr. Wang wrote MNT.

Dr. Sleep Research Group For middle-aged people, 15 to 30 minutes of sleep a day “may be optimal and not associated with increased risk of cardiometabolic disease,” Wang said.

Dr. Yu-Ming Ni, a cardiologist at MemorialCare Heart and Vascular Institute at Orange Coast Medical Center in Fountain Valley, California. MNT Sleep is not a problem in itself. A person who is forced to sleep during the day does not get enough or quality sleep.

“If you’re one of those people … ask yourself, ‘Why do I need to sleep at night?’ Is there anything I can do about the way I sleep? [so that] Do I have better energy so I don’t fall asleep later?’” Dr. He did not explain. “If you can answer that question, I think it can help you understand whether or not you’re at risk for heart disease.”

Dr. Ni recommends that people who think they have sleep apnea talk to their doctors. Sleep apnea is a common disorder in which a person’s breathing stops and starts repeatedly during sleep. Symptoms may include fatigue, irritability, and difficulty concentrating during the day. Dr. Nee also cautions her patients to be careful about turning off screens a few hours before bed.

“I think that’s the biggest problem we have right now,” said Dr. There is no roof MNT. “We actually have hormones that control how much light our eyes see and how much light our eyes don’t see, and those hormones make us sleepy or sleepy. So, if you’re exposed to light at night… from your TV, computer screen, or smartphone, it’s fooling you. [your] He thinks it’s not time to sleep yet.

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