Heart health or cardiovascular diseases are the leading causes of mortality in the world. In 2019, 17.9 million people died due to cardiovascular diseases with 85% of these deaths attributed to heart attacks and strokes. There are many types of cardiovascular diseases, many of which are chronic diseases. While the numbers of death due to heart attacks may seem high, new study published in the Journal of the American Heart Association shows these numbers have actually decreased. However, while these numbers went down, chronic diseases have seen a rise.

How Have Heart Disease Deaths Changed Over Time?

To understand how heart disease deaths have changed, researchers looked at national data from 1970 to 2022, focusing on adults aged 25 and older. Heart disease covers many different heart problems. Even though heart disease remains the leading cause of death in the U.S. (responsible for 24% of all deaths in 2022), the total number of deaths from heart disease actually went down by 66%.

Deaths from ischemic heart disease (the most common type, caused by blocked arteries) dropped significantly, from 91% to 53% of all heart disease deaths. Deaths from heart attacks (often the first sign of ischemic heart disease) fell by a huge 89%, making up less than a third of all heart disease deaths in 2022. But the study also found a big increase in other heart conditions, which now account for nearly half of all heart disease deaths. The three conditions that rose the most were:

Hypertensive heart disease

Deaths from this condition, caused by long-term high blood pressure, went up by 106%. It now makes up 13% of all heart-related deaths.

Heart failure

Deaths from this condition, where the heart can't pump enough blood over time, rose by 146%. It now accounts for 12% of all heart-related deaths.

Arrhythmias (irregular heartbeats)

Deaths from arrhythmias, where the heart beats too fast, too slow, or unevenly, soared by 450%. They now make up 4% of all heart-related deaths.

One of the study's authors mentioned that while these trends are "quite clear," some changes in how deaths were categorized might have caused small inaccuracies. Also, the study didn't fully consider how other health problems or things like race might have affected the results. For example, some heart problems might have been underestimated if they stemmed from ischemic heart disease.

Despite these minor points, experts agree the study provides "valuable insights" and is a "well-designed, large-scale study" using over 50 years of data.

Why the Shift to Chronic Heart Conditions?

Experts believe the drop in some heart disease deaths is due to better ways to diagnose problems and improved care. This includes new medicines and procedures that help restore blood flow to the heart.

However, many people who survive a heart attack go on to develop other heart conditions like heart failure or arrhythmias. When you combine this with a growing older population and rising rates of obesity, diabetes, and high blood pressure, it creates "the perfect storm for chronic cardiac disease." This new "wave of chronic heart disease deaths" mainly affects older adults and those with several health issues.

How to Protect Your Heart?

To keep your heart healthy, focus on a few key areas: know your numbers by tracking your blood pressure, cholesterol, blood sugar, and weight, as early detection of issues is vital. Stay active with at least 150 minutes of moderate exercise weekly; even walking can significantly improve heart function. Eat a nutritious diet rich in vegetables, fruits, whole grains, lean proteins, and healthy fats, following heart-healthy guidelines. Avoid smoking or seek help to quit, as it's a primary cause of heart disease. Finally, manage stress and get enough sleep, as these often-overlooked factors are crucial for reducing your heart risk.

Scientists have long been puzzled over how the brain clears away its own waste. Unlike the rest of the body, which relies on the lymphatic system to carry waste from cells into circulation, the brain appeared to have no such mechanism. That mystery shifted about 12 years ago when researchers discovered the glymphatic system, a network that acts as the brain’s built-in cleaning service.

The glymphatic system works by circulating cerebrospinal fluid (CSF) through the brain’s tissues. This fluid enters the spaces between brain cells, collects waste, and carries it out along large veins. In animal studies, particularly in mice, the system appears most active during sleep. That discovery suggested that sleep might be essential for brain detoxification, and disrupted rest could interfere with waste clearance.

Among the most important toxins flushed out by the glymphatic system is amyloid beta (Aβ), a protein that, when accumulated, forms sticky plaques in the brain. These plaques, along with tangles of tau protein, are a defining feature of Alzheimer’s disease—the most common cause of dementia worldwide.

The idea that better sleep helps the brain clean itself is more than a scientific curiosity. It may help explain why people who consistently struggle with poor sleep face higher risks of dementia.

In humans, levels of amyloid beta in cerebrospinal fluid rise during waking hours and drop during sleep, suggesting that rest is when the brain “takes out the trash.” In one striking experiment, researchers kept healthy adults awake for a single night. Just 24 hours of sleep deprivation increased amyloid beta in the hippocampus, the brain region essential for memory and one of the first to show damage in Alzheimer’s disease.

Still, questions remain. While several mouse studies indicate the glymphatic system is most active at night, other recent experiments suggest it may work differently depending on the time of day or even the species. The debate highlights how much more we need to learn about how this system functions in humans.

How Do Sleep Disorders Increase Risk of Dementia?

Not all sleep is equal. Short-term sleep loss is harmful, but chronic sleep problems can be particularly damaging to brain health.

Sleep Apnoea

Sleep apnoea, where breathing repeatedly stops and starts during sleep, deprives the brain of oxygen and fragments rest. Both oxygen deprivation and chronic sleep disruption are thought to contribute to toxin build-up in the brain. Importantly, studies show that patients treated for sleep apnoea—often with continuous positive airway pressure (CPAP) machines—see greater clearance of amyloid beta. This suggests that treatment may help restore the brain’s waste-disposal rhythm.

Insomnia

Insomnia, defined as difficulty falling or staying asleep, has also been linked to higher dementia risk. While the association is clear, the mechanism is less so. Does insomnia accelerate amyloid build-up? Could treatment reverse the trend? Researchers are only beginning to explore whether therapies—such as orexin receptor antagonists, a new class of sleep drugs—might improve toxin clearance.

Untreated sleep disorders don’t just leave you tired—they may be undermining your brain’s long-term health.

Can Sleep Prevent Dementia?

While early findings are promising, science isn’t yet ready to declare sleep a cure for dementia. What researchers do know is that sleep deprivation can rapidly alter amyloid levels in the brain, and chronic sleep disorders such as apnoea and insomnia are associated with a higher risk of developing dementia. Treating sleep apnoea appears to improve amyloid clearance, though evidence regarding the effects of insomnia treatment remains limited.

What remains uncertain is whether improving sleep directly reduces dementia risk. Large, long-term clinical studies are still needed to confirm the link. Researchers are actively pursuing this question, measuring proteins like amyloid beta and tau in blood and spinal fluid across sleep-wake cycles, in both healthy individuals and those with sleep disorders.

The global dementia burden is growing. Alzheimer’s and related dementias currently affect more than 55 million people worldwide, with cases expected to triple by 2050. While scientists race to develop new drugs, lifestyle measures—such as improving sleep—are emerging as powerful, accessible tools for prevention.

If better sleep helps the glymphatic system flush out harmful proteins, prioritizing rest may be one of the simplest ways to protect long-term brain health. That means:

• Maintaining a consistent sleep schedule.
• Addressing sleep disorders like apnoea with medical guidance.
• Seeking help if insomnia is chronic.

While the science continues to evolve, the advice remains practical: treat sleep as essential, not optional.

The glymphatic system is a reminder that the brain, like the body, needs maintenance. Just as poor diet, smoking, or lack of exercise take their toll, chronic sleep disruption may leave toxins lingering in the brain, setting the stage for cognitive decline.

The exciting part is that this field of research is still in its infancy. Scientists are mapping the biology of how the brain cleans itself and testing new ways to boost that process. Whether through targeted drugs, therapies for sleep disorders, or simply protecting natural sleep cycles, the future may bring strategies to slow or even prevent dementia.

Breast cancer is one of the leading causes of death for women all over the world. It is the most common cancer diagnosed in American women and a leading cause of cancer death in less developed countries. In India alone, cancer cases are projected to reach over 1.5 million by 2025.

Since this disease is so widespread, it's essential to be well-informed. Dr. Lauren Ramsey, a breast cancer surgeon, shared four important facts that she believes every woman should know. These tips, originally posted on her Instagram, provide crucial information for understanding breast cancer risk and detection.

Family History Is Not the Only Risk Factor

Only a small number of breast cancer cases—about 5-10%—are actually caused by genes you inherit, such as the BRCA mutation. This means that most breast cancers are not passed down through families.

Therefore, even if no one in your family has ever had breast cancer, it's still extremely important for you to get regular screenings, like mammograms. Relying only on family history can give you a false sense of security, so remember that breast cancer can affect anyone, and consistent check-ups are your best defense.

Look Beyond a Lump

Many people think that the only sign of breast cancer is a lump. However, this isn't true. It's really important to pay attention to other changes in your breasts, because they can also be a sign of cancer.

Be on the lookout for things like changes in your skin, such as redness or dimpling (like an orange peel). Other signs can include swelling, a new pain that doesn't go away, or any unusual discharge from your nipple. Knowing what your breasts normally look and feel like is key to spotting these more subtle changes early.

Breast Density Affects Detection

Breast density refers to how much fibrous and glandular tissue a person has compared to fatty tissue. Many people, especially younger women, have naturally dense breasts. While this is completely normal and not a health problem on its own, it can make it harder for doctors to see breast cancer on a standard mammogram.

That's because both dense tissue and tumors appear white on a mammogram, making it difficult to tell them apart. If you have dense breasts, your doctor might recommend extra tests, like an ultrasound or an MRI, to get a clearer picture. You can ask your doctor about your breast density after your mammogram.

Lifestyle Changes Can Make a Difference

The healthy habits you often hear about—like eating well and exercising—are not just a suggestion; they can actually lower your risk of developing breast cancer. Making simple changes can have a big impact. Try to limit the amount of alcohol you drink and reduce your intake of processed foods, which are often high in sugar and unhealthy fats.

At the same time, try to be more physically active every day. Even a short daily walk can help. These positive choices are a great way to take control of your health and reduce your risk. This information is shared with care, so everyone can be empowered with knowledge about their health.

Health officials in the Democratic Republic of the Congo (DRC) have announced a new outbreak of the Ebola virus in Kasai Province. As of September 4, 2025, there have been 28 suspected cases and 15 deaths, including four health workers. The outbreak is affecting the Bulape and Mweka health zones.

The alarm was first raised when people in the area started showing a mix of worrying symptoms, including fever, vomiting, diarrhea, and bleeding. These symptoms are tell-tale signs of a serious illness. To find out what was causing it, officials took samples and sent them to a lab in Kinshasa, the country's capital. The lab results came back on September 3rd, confirming the cause was the Ebola Zaire virus.

What Is Ebola Virus?

According to World Health Organization (WHO), Ebola is a very serious and often deadly illness in people. It's caused by several different viruses, with the most common being the Ebola virus, which has led to large outbreaks. The chance of a person dying from Ebola is about 50%, but this number has varied widely in the past, from 25% to 90%.

To ensure safety, a team of experts from WHO, and the DRC's own rapid response unit has been sent to the area. Their main job is to quickly find sick people and get them care, stop the virus from spreading in hospitals, and teach local communities how to protect themselves.

The WHO is also sending a massive delivery of two tons of medical supplies, including protective gear for health workers and a special mobile lab. This is a big help, especially because the area is hard to get to, with few roads and limited air travel.

What is The First Symptoms of Ebola

The symptoms of Ebola usually start to appear 8 to 10 days after a person has been in contact with the virus, but it can take anywhere from 2 to 21 days. At first, the symptoms are similar to common illnesses and are often called "dry" symptoms:

• Fever
• Severe headache
• Aches and pains in muscles and joints
• Feeling very weak and tired
• Sore throat

Later Symptoms

As the illness gets worse, usually after four or five days, the symptoms change and become more severe. These are known as "wet" symptoms:

• Loss of appetite
• Unexplained bleeding
• Stomach-related problems like nausea, vomiting, abdominal pain, and diarrhea.

How Do You Treat and Control Ebola Virus?

While there's no guaranteed cure, getting early and strong medical care—like staying hydrated and treating symptoms—can greatly increase a person's chances of survival. Right now, approved vaccines and treatments are only available for the most common type of Ebola (Ebola virus), but scientists are working on others. To stop an outbreak from spreading, health officials use a mix of strategies:

• Taking care of the sick in a way that provides a lot of support.
• Preventing infection in hospitals and communities.
• Finding and tracking everyone who might have been in contact with an infected person.
• Quickly testing samples in labs.
• Ensuring safe burials for those who have died.
• Using vaccines when available.
• Educating the public on how to stay safe.

How Is The Ebola Outbreak In Kasai Being Dealt With?

The DRC is well-prepared to fight this outbreak. The country has a supply of treatments and 2,000 doses of the Ervebo Ebola vaccine. This vaccine is very effective against this specific type of Ebola. The doses, which were ready and waiting in Kinshasa, are now being sent to Kasai.

They will be used to protect people who were in contact with infected individuals and to vaccinate the doctors and nurses on the front lines. The country has a lot of experience fighting Ebola—this is its 16th outbreak since the virus was first found in 1976. That experience will be a huge advantage in bringing this new outbreak to an end.