Monday October 22, 2018

Can Sleeping More Affect Your Heart?

While sleeping more raised triglycerides levels in both men and women, in women it led to higher waist circumference, blood sugar as well as lower levels of "good" cholesterol

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Can Sleeping More Affect Your Heart?
Can Sleeping More Affect Your Heart? Pixabay
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If you thought that only less hours of sleep would affect your health, then you are wrong. Sleeping more than 10 hours per day is also associated with metabolic syndrome, raising the risk for heart diseases, according to a new study.

Those who slept for over 10 hours daily were at risk of elevated waist circumference, high triglyceride levels — a type of fat, low levels of “good” cholesterol, hypertension as well as high fasting blood sugar — referred to as metabolic syndrome and associated with increased risk of cardiovascular diseases.

While sleeping more raised triglycerides levels in both men and women, in women it led to higher waist circumference, blood sugar as well as lower levels of “good” cholesterol.

Representational image.
Representational image. Pixabay

Conversely, getting less than six hours of sleep was associated with higher risk of metabolic syndrome in men and higher waist circumference among both men and women, researchers said.

“This is the largest study examining a dose-response association between sleep duration and metabolic syndrome and its components separately for men and women,” said lead author Claire E. Kim from Seoul National University College of Medicine in South Korea.

Also Read: Study: Sleeping For 7 Hours to Keep Your Heart Younger

The study, published in the journal BMC Public Health, included data from 1,33,608 participants aged between 40-69 years. The results showed that the prevalence of metabolic syndrome was just over 29 per cent in men and 24.5 per cent in women.

“We observed a potential gender difference between sleep duration and metabolic syndrome, with an association between metabolic syndrome and long sleep in women and metabolic syndrome and short sleep in men,” said Kim. (IANS)

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Air Pollution Linked to Changes in Heart Structure

Higher exposures to the pollutants were linked to more significant changes in the structure of the heart, the findings showed

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Air Pollution.
Air pollution may also lead to changes in heart structure. Pixabay

Researchers have found that people exposed to even low levels of air pollution can have changes in the structure of the heart, similar to those seen in the early stages of heart failure.

For every one extra microgram per cubic metre of PM2.5 — small particles of air pollution — and for every 10 extra microgram per cubic metre of nitrogen dioxide (NO2), the heart enlarges by approximately 1 per cent, showed the findings of the Britain-based study published in the journal Circulation.

“Although our study was observational and hasn’t yet shown a causal link, we saw significant changes in the heart, even at relatively low levels of air pollution exposure,” said one of the researchers Nay Aung from Queen Mary University of London.

For the study, the researchers looked at data from around 4,000 participants in the UK Biobank study, where volunteers provided a range of personal information, including their lifestyles, health record and details on where they have lived.

Higher exposures to the pollutants were linked to more significant changes in the structure of the heart,
Higher exposures to the pollutants were linked to more significant changes in the structure of the heart. Pixabay

Participants also had blood tests and health scans, and heart MRI (magnetic resonance imaging) was used to measure the size, weight and function of the participants’ hearts at fixed times.

The team found a clear association between those who lived near loud, busy roads, and were exposed to nitrogen dioxide or PM2.5 and the development of larger right and left ventricles in the heart.

Also Read: Air Pollution Linked to 3.2 Million New Diabetes Cases in One Year

The ventricles are important pumping chambers in the heart and, although these participants were healthy and had no symptoms, similar heart remodelling is seen in the early stages of heart failure.

Higher exposures to the pollutants were linked to more significant changes in the structure of the heart, the findings showed. (IANS)

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