Tag Archives: heart

The Hubble Space Telescope zooms in on the heart of NGC 4753

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NGC 4753 is characterized by a bright white core and distinct dust lanes around the core.

This Hubble image shows part of the lenticular galaxy NGC 4753, about 60 million light-years away in the constellation Virgo. Image credit: NASA / ESA / Hubble / L. Kelsey.

NGC4753 It is located approximately 60 million light years away in the constellation Virgo.

Also known as LEDA 43671, UGC 8009, or IRAS 12498-0055, this lenticular galaxy was discovered by German-born British astronomer William Herschel on February 22, 1784.

NGC 4753 is a member of galaxy group NGC 4753 in the Virgo II cloud, a collection of at least 100 galaxy clusters and individual galaxies extending from the southern edge of the Virgo Supercluster.

“NGC 4753 is thought to be the result of a galaxy merger with a nearby dwarf galaxy about 1.3 billion years ago,” Hubble astronomers said in a statement.

“The unique dust lanes around the galactic cores are thought to be formed by this merging event.”

“Most of the galaxy's mass is now thought to reside within a slightly flattened spherical halo of dark matter.”

“Dark matter is a type of matter that cannot currently be directly observed, but it is thought to make up about 85% of all matter in the universe,” the researchers said.

“It is called 'dark' because it does not appear to interact with electromagnetic fields and therefore does not appear to emit, reflect, or refract light.”

“This object is also of scientific interest for testing various theories about the formation of lenticular galaxies, given its low-density environment and complex structure.”

“Additionally, this galaxy has experienced two known Type Ia supernovae.”

“These types of supernovae are very important because they are caused by the explosion of a white dwarf star with a companion star and always peak at the same brightness, or 5 billion times brighter than the Sun.”

“Knowing the true brightness of these events and comparing it to their apparent brightness gives astronomers a unique opportunity to measure distances in the universe.”

This new image of NGC 4753 consists of observations from Hubble's Wide Field Camera 3 (WFC3) found in the ultraviolet and optical parts of the spectrum.

Two filters were used to sample different wavelengths. Color is obtained by assigning different hues to each monochromatic image associated with an individual filter.

Source: www.sci.news

Intermittent fasting linked to higher risk of heart disease-related death

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Eating within eight hours, commonly known as the 16:8 diet, is a common form of fasting.

Christina Pedrazzini/Science Photo Library/Getty Images

Restricting eating time to eight hours a day (a common type of intermittent fasting) is associated with an increased risk of death from heart disease. However, some scientists believe that people with pre-existing health conditions may unconsciously eat intermittent meals if their symptoms or treatments affect their appetite and perhaps the quality of the meal is more important than the time of the meal. It claims that you may choose to fast.

It has long been reported that time-restricted eating can lead to improvement. blood pressure, Blood glucose level and cholesterol levelbut the long-term effects are unknown.

You can learn more about Chong Wenze Researchers from Shanghai Jiao Tong University in China and their colleagues surveyed about 20,000 adults (almost evenly split between men and women) who took part in the US National Health and Nutrition Examination Survey. Their average age was 49 years, and just under three-quarters were non-Hispanic white.

Each year from 2003 to 2018, study participants self-reported their dietary information. The researchers then matched this with U.S. Centers for Disease Control and Prevention death records from 2003 to 2019. Participants were eligible if they were 20 years of age or older and had completed two dietary questionnaires within one year of the study.

Over an average 8-year follow-up period, the research team found that even though intermittent fasting is often praised, people who ate in an 8-hour window per day were less likely to eat on a 12-hour daily eating schedule. They discovered that they cannot live longer than humans for ~16 hours. For longevity benefits.

Researchers also found that people who followed an eight-hour eating schedule were 91 percent more likely to die from heart disease during the follow-up period than those who ate for 12 to 16 hours or more.

Among people diagnosed with heart disease before the study, those who ate for more than 8 to 10 hours had a 66% higher risk of dying from heart disease than those who ate for more than 12 to 16 hours. Among people diagnosed with cancer, eating for more than 16 hours had a lower risk of dying from cancer than those on a more restrictive eating schedule.

The study, presented at the American Heart Association (AHA) Epidemiology and Prevention Conference in Chicago, does not prove that time-restricted eating caused these deaths, Zhong said. To tell.

They said it was important to consider why participants practiced time-restricted eating. benjamin horn at Intermountain Heart Institute in Salt Lake City, Utah. Some people may have adopted this pattern intentionally, he says, while others may have limited eating windows due to health conditions or treatments that affect their appetite.

He says some people may have restricted eating schedules because of limited access to food. jo ann carson, former chair of the AHA Nutrition Committee. According to research, Food insecurity is linked to unhealthy lifestyles that lead to heart disease. “We also don’t know anything about the health of the food they ate,” Carson said.

The authors acknowledge in their paper that their study relied on self-reported dietary information, which may be inaccurate. They plan to investigate whether this finding applies to a wider range of ethnic groups and how fasting may increase the risk of adverse health outcomes.

People who want to reduce their chances of dying prematurely “should aim for an overall heart-healthy eating pattern, regardless of mealtime,” Carson says. People who want to start intermittent fasting should talk to their doctor first, Horn says.

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Source: www.newscientist.com

Niacin, Vitamin B3 Supplements Linked to Higher Risk of Heart Attack and Stroke

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Niacin, or vitamin B3, is a popular supplement

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People with high levels of niacin (also known as vitamin B3) in their blood may be more likely to have a heart attack or stroke than people with low levels of niacin. Consuming too much of this vitamin, which is routinely added to fortified foods and can also be taken as a supplement, can cause inflammation in blood vessels.

Heart attacks and strokes are the leading causes of death worldwide. Although researchers have made great strides over the past few decades in discovering risk factors for these conditions, they have not identified them all.

“If treated [high] cholesterol and [high] You can still have a heart attack even if you have high blood pressure, diabetes, or any other pre-existing risk factors. ”Stanley Hazen at the Cleveland Clinic in Ohio. “There's something we're missing.”

To fill these gaps, Hazen and his colleagues collected blood samples from 2,331 U.S. adults and 832 European adults who chose to undergo cardiovascular testing. The researchers analyzed the samples for substances called metabolites, which are byproducts of metabolic processes such as digestion. The researchers then tracked participants' occurrence of cardiac events, such as heart attacks and strokes, over a three-year period.

The researchers found that people with high levels of a metabolite called 4PY were, on average, about 60 percent more likely to experience such an event than those with lower levels. This compound only occurs when the body breaks down excess niacin.

Further experiments revealed that 4PY inflamed blood vessels in rodents. We know that inflammation is a major contributor to the development of heart disease, Hazen said.

It's not uncommon for people to have high niacin levels, he says. This is partly because certain foods, such as cereals and flour, are routinely fortified with vitamins in countries including the UK and US.

Niacin supplements are also becoming more popular Evidence suggests it has anti-aging effects says Hazen. Additionally, doctors stopped prescribing high doses of niacin to people at risk for cardiovascular disease because it was initially thought that the vitamin protected people from the risk of cardiovascular disease by lowering cholesterol. It happened recently.

“I think this study really shows that when it comes to vitamins, sometimes you can have too much of a good thing,” he says. Jenny Jia at Northwestern University in Chicago, Illinois.

However, this study was primarily conducted on people of European descent. So it's unclear whether similar results would occur in people of different racial or ethnic backgrounds, Zia said.

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  • heart attack/
  • Heart disease

Source: www.newscientist.com

Pregnancy Strap that Monitors Heart Rate Could Forecast Preterm Birth

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Scientists used fitness tracker WHOOP to monitor heart rate during pregnancy

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Wearing a wrist-strap heart rate tracker during pregnancy may help doctors predict who is at risk for premature birth.

In previous research, shon rowan Researchers at West Virginia University recruited 18 women to wear heart-tracking wrist straps from the brand WHOOP throughout their pregnancies.

They were all born at term, and tracking data showed that heart rate variability (the variation in the time interval between heartbeats) decreased clearly during the first 33 weeks of pregnancy, and then steadily increased until birth. It became clear.

Rowan was curious to see if the same pattern occurred in people who give birth prematurely. Emily Capodilupo A larger study is being conducted at WHOOP in Boston, Massachusetts. They and colleagues analyzed tracker data provided by 241 pregnant women between the ages of 23 and 47 in the United States and 15 other countries. It is unclear whether this data includes data for transgender men.

All participants were pregnant with one child born between March 2021 and October 2022. In total, more than 24,000 heart rate variability records were provided.

Similar to the previous study, those who gave birth at term showed an obvious switch in heart rate variability around 33 weeks of gestation, or an average of seven weeks before delivery.

However, the 8.7% who were born prematurely had much less consistent patterns of heart rate variability, Rowan said. This change from decrease to increase in variability occurred at different times during pregnancy, but similar to those born at term, the change occurred on average about 7 weeks before birth, although the birth was premature. It seemed like there was.

In the future, the device could identify pregnancies that require closer monitoring or benefit from administering drugs such as steroids to help the fetus' lungs develop, Rowan said.

You can also plan to stay near hospitals that provide specialized care, which can be especially helpful for people who live in remote areas, he says.

“Once we are able to remotely monitor some of their health using things like the WHOOP tracker, and we start to see changes in that. [in heart rate variability]Then you might be able to be a little more proactive,” says Rowan.

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Source: www.newscientist.com

Can Inspirational Speeches Boost Your Gym Performance? A Look at the Callus on Your Heart

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Maybe my father walked out on me, the speaker theorized, his voice sounding like the crash of drums (often typical of tense moments on reality TV shows).

Father absence is a common theme in motivational training speeches, so the narrator in my earphones takes the form of a father. Sometimes they encourage dad, but more often dad yells angrily from the sidelines.

Motivational speeches were first adopted by weightlifters who called for loud encouragement during bench presses, but have since made their way into the fitness mainstream. These stand-in dads live in a maze of proliferating playlists on Spotify and YouTube. So you can listen to it at the gym, or if you’re feeling bored, you can watch a montage of stock footage of people screaming in the rain on your laptop. Tracks can feature snippets from solo speakers or multiple sources. Ministers, athletes, and business leaders feature prominently, but their voices are often uncredited. The voice is usually accentuated with dramatic music.

you probably know better david goggins a former U.S. Navy SEAL lashed out at the cameras during a run, ordering his 10.4 million Instagram followers to “numb your mind.”

Jenny Valentish poses before a bodybuilding competition. Photo: Diana Domonkos

When it comes to motivation, I prefer carrots to sticks. “Great work” makes me blossom. But after a few months of overindulgence, you need a strict taskmaster. I usually take my training seriously, fighting in Muay Thai and competing in amateur bodybuilding, but if anything, when I started going into full beast mode, my true self… ‘s father was a little confused.

Source: www.theguardian.com