Smokers who make the decision to quit will experience immediate health benefits, including a rapid reduction in their risk of atrial fibrillation (A-Fib), according to new research published in JACC: Clinical Electrophysiology. The study, conducted by Dr. Gregory Marcus, a cardiologist at the University of California, San Francisco, offers compelling evidence for smokers to quit, showing that it’s never too late to avoid the damaging effects of smoking on heart health.

Dr. Marcus, the senior author of the study, emphasized that A-Fib can be prevented even in individuals who have smoked for years. "The findings provide a compelling new reason to show current smokers that it’s not too late to quit, and that having smoked in the past doesn’t mean you’re ‘destined’ to develop A-Fib," Marcus explained. "Even for the current and longtime smoker, A-Fib can still be avoided."

What is Atrial Fibrillation (A-Fib)?

"There’s strong evidence that smoking increases the risk of A-Fib," Marcus said. "But the benefits of quitting smoking have been less certain." With this in mind, his team sought to determine whether quitting could significantly lower a person’s risk of developing A-Fib, or if the risk would remain the same.

The research team analyzed data from over 146,700 current and former smokers, tracking their smoking habits and health over a 12-year period using data from the UK Biobank database. The results were promising: former smokers had a 13% lower risk of developing A-Fib compared to current smokers, while those who quit during the study saw an 18% reduction in their risk.

"This is likely a testament to the potency of reducing atrial fibrillation risk pretty shortly after quitting," Marcus said in a statement from the American College of Cardiology.

The findings highlight the importance of quitting smoking, not only for general health but specifically for reducing the risk of serious heart conditions like A-Fib.

Tips for Quitting Smoking

Quitting smoking is one of the most effective ways to lower the risk of A-Fib and improve overall heart health. While it can be challenging, the benefits of quitting are clear and immediate. Here are some tips to help you quit smoking successfully:

1. Choose a specific date to quit smoking and stick to it. Prepare yourself mentally and physically for this change.

2. Reach out to family, friends, or a support group to help keep you accountable. Sharing your goals with others can provide encouragement.

3. Options like nicotine patches, gum, or lozenges can help ease withdrawal symptoms and reduce cravings.

4. Identify situations that make you want to smoke, such as stress or social gatherings, and find healthy ways to cope with them.

5. Regular exercise can help distract you from cravings and improve your mood during the quitting process.

6. Drinking water can help flush nicotine out of your system faster, reducing cravings.

7. Activities like yoga, meditation, or deep breathing exercises can help manage stress, a common trigger for smoking.

Quitting smoking offers immediate and significant benefits, particularly in reducing the risk of atrial fibrillation. The latest research provides smokers with more motivation to quit, showing that it's never too late to take control of their heart health.

Breast cancer diagnosed shortly after pregnancy may be more aggressive. According to new research, some young mothers may face poorer outcomes despite having similar types of breast cancer tumors as other women.

A UCLA-led study, published in npj Breast Cancer, found that women diagnosed with hormone receptor-positive (HR+), HER2-negative breast cancer within the first three years after childbirth, especially during the first year, were more likely to have tumors with a higher risk of recurrence.

It therefore indicates that postpartum breast cancer is not simply breast cancer diagnosed after pregnancy but may be a biologically distinct disease.

Breast Cancer In New Mothers

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Researchers analyzed young women with HR-positive, HER2-negative breast cancer using the widely used 21-gene Oncotype DX Recurrence Score, a genomic test that helps predict the likelihood of cancer recurrence and whether chemotherapy may be beneficial.

They discovered that tumors diagnosed during the first three years after childbirth had significantly higher recurrence rates than tumors in women who had never given birth.

The highest scores were observed among women diagnosed within the first year after delivery.

"Our findings suggest that the first three years after childbirth represent a distinct biological window during which hormone receptor-positive breast cancers may behave more aggressively," the researchers observed.

The study also provides one of the first genomic definitions of this high-risk postpartum period rather than relying solely on clinical observations.

Can Childbirth Change Breast Cancer Outcome?

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Researchers believe that the answer to that question lies in what happens to the breast after breastfeeding comes to an end.

After pregnancy and lactation, the breast undergoes a natural process called mammary gland involution, during which the milk-producing tissue shrinks, and the breast returns to its pre-pregnancy state.

While this change is normal, it creates a temporary environment that features inflammation, weakened immune system, and extensive tissue restructuring.

According to a recent review published in Breast Cancer Research, these biological changes may unintentionally create conditions that help dormant cancer cells survive, grow, and spread. Researchers describe this postpartum remodeling as a "tumor-promoting microenvironment."

These processes may partly explain why postpartum breast cancers are often diagnosed at more advanced stages and have poorer outcomes than breast cancers in women of similar age who have not recently given birth.

Effect Of Delay In Childbirth

The findings hold importance as breast cancer rates among younger women continue to increase worldwide just when women are getting pregnant later in their lives. Previous studies have indicated that breast cancer detected after pregnancy behaves differently.

"The medical community has long recognized that breast cancers diagnosed after pregnancy can behave differently," UCLA researchers said. "With breast cancer rates among younger women increasing, scientists have been studying whether delayed timing of first pregnancy may help explain some of that trend."

Because pregnancy and breastfeeding naturally change breast tissue, warning signs like lumps or breast firmness can sometimes be mistaken for normal postpartum changes. This may delay diagnosis and allow cancers to progress before they are detected.

Every baby born in England will be offered a life-saving genetic screening test for spinal muscular atrophy (SMA) from October 2027, the UK Department of Health and Social Care announced on Thursday.

The government said it will expand newborn screening for SMA across the country as part of a national evaluation program. The rollout will begin later this year, with hundreds of thousands of babies expected to be screened before universal coverage is achieved in 2027.

The decision follows campaigning for universal newborn screening by former Little Mix singer Jesy Nelson, whose twin daughters, Ocean Jade and Story Monroe Nelson, were diagnosed with the rare muscle-wasting disorder.

Calling it a "day of hope", Nelson called the move a "victory for every family affected by SMA".

When Will SMA Screening Begin?

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The SMA screening evaluation program will begin across England in autumn 2026, with laboratories starting to test newborns from October 2026—three months earlier than originally planned after the government committed to accelerating the rollout.

Almost 72% of newborns in England are already due to be tested from October under a pilot program announced in April.

From October 2027, screening will be expanded to all babies born in England, covering an estimated 560,000 to 570,000 newborns every year. Universal coverage will be achieved by increasing the number of laboratories able to carry out the testing from seven to 13.

How Will the Test Be Done?

The screening will use the routine heel-prick blood test, performed when babies are five days old.

A small blood sample collected through the heel prick will be tested for SMA alongside the 10 conditions already included in the newborn screening program, such as:

• Cystic fibrosis
• Sickle cell disease
• Congenital hypothyroidism

Why Early Detection Matters

Read More: Babies Without Vitamin K Shot At Higher Risk Of Brain Bleeding: Study

SMA can leave babies unable to sit up, crawl or walk. In its most severe forms, it can also affect breathing and swallowing.When diagnosed early, babies can receive effective treatment—including gene therapy—which can significantly improve outcomes.

"No parent should have to watch their child lose the ability to move or breathe, knowing that earlier treatment could have made all the difference," said James Murray, Secretary of State for Health and Social Care.

What Is Spinal Muscular Atrophy (SMA)?

Spinal muscular atrophy (SMA) is a rare genetic neuromuscular disorder caused by mutations in the SMN1 gene, resulting in a deficiency of the SMN protein.

The condition causes the progressive loss of motor neurons in the spinal cord, leading to severe muscle weakness and muscle wasting.

Babies with SMA may have:

• Floppy arms and legs
• Difficulty sitting, crawling or walking
• Problems with breathing and swallowing

If left undiagnosed and untreated, the most severe forms of SMA can be fatal within the first two years of life.

SMA affects around one in every 10,000 babies, with approximately 48 babies diagnosed each year in the UK.

Health officials say newborn screening will allow affected babies to receive life-changing treatment before symptoms develop.

"This is a hugely important step forward. When newborn screening for SMA begins later this year in October, thousands of babies will benefit from earlier diagnosis and access to life-changing treatment," said Giles Lomax, Chief Executive of Spinal Muscular Atrophy UK, while welcoming the announcement.

Sleep disorders have long been associated with daytime fatigue, poor concentration, and memory problems. Now, a new neuroimaging study suggests that the impact of sleep disorders could be deeper.

Researchers have found that people with sleep disorders show structural changes in brain regions involved in attention, motivation, decision-making, and emotional regulation.

The findings, published in the Nature Portfolio journal Scientific Reports, are based on one of the largest neuroimaging meta-analyses examining structural changes in the brain across multiple sleep disorders.

Common Brain Changes Due To Sleep Disorders

Researchers analyzed data from numerous brain imaging studies involving people diagnosed with various sleep disorders. The following alterations were absorbed in different regions of the brain:

• The prefrontal cortex plays a key role in planning, attention, and decision-making.
• The anterior cingulate cortex, involved in emotional regulation, conflict navigating, and motivation.
• The thalamus, which helps regulate attention and acts as a communication link between different brain regions.
• The posterior cingulate cortex, associated with examining choices, memory, and internally directed thinking.

Sleep And Brain Health

According to the researchers, disrupted sleep may interfere with the brain's ability to maintain biological functions.

Rather than affecting a single region, sleep disorders appear to impact multiple interconnected networks in the brain.

This could be why many people with chronic sleep disorders experience symptoms beyond tiredness. Some of them are:

• Difficulty concentrating
• Slower thinking
• Poor decision-making
• Reduced motivation
• Emotional instability
• Problems with memory and attention

Also read: Pediatric Sleep: The Foundation Of Healthy Growth, Behavior And Society

These symptoms are commonly reported in conditions like insomnia, obstructive sleep apnea, restless legs syndrome, and other chronic sleep disorders.

The new study adds to the evidence that healthy sleep is essential for maintaining optimum cognitive function.

Previous studies have linked sleep deprivation to poor attention, slower reflexes, increased dementia risk, and poor emotional processing.

They have also indicated that even chronic sleep deprivation can contribute to changes in brain health alongside metabolic and cardiovascular effects.

Also read: Why Are Sleep Disorder Cases Rising In Children Under 10 In South Korea?

Poor Sleep Can Also Affect Heart Health

In an earlier study, researchers discovered that even just three nights of insufficient sleep were enough to change blood chemistry, affecting heart health.

In the study, it was observed that the levels of proteins linked to a higher risk of heart disease and inflammation went up after just three nights of poor sleep.

It was further observed that while exercise had some positive effects on protein levels, it wasn't enough to completely eliminate the harm caused by not sleeping enough. Even with exercise, participants still showed increased levels of 16 proteins associated with heart disease.

The study points out how young and healthy people can face these negative biological changes from short-term sleep loss.

Bottomline

Persistent problems with falling asleep, staying asleep, excessive daytime sleepiness, or interrupted breathing during sleep deserve immediate medical attention.

As researchers continue to unravel how sleep shapes the brain, one message has become increasingly clear: quality sleep is not simply a time of rest. It is an essential biological process that supports physical health, attention span, decision-making, emotional well-being, and overall cognitive health.