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AI algorithm can rule out heart attacks with 99.6% accuracy

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Heart attacks could soon be diagnosed faster and more accurately thanks to a new test developed with artificial intelligence.

It’s hoped the UK-led breakthrough could reduce the pressure on accident and emergency departments and help end inequalities in diagnosis, which previous research has shown sees women 50% more likely to get a wrong initial prognosis.

People who are initially misdiagnosed have a 70% higher risk of dying after 30 days, according to statistics from the British Heart Foundation.

But researchers at the University of Edinburgh, who developed the algorithm it’s hoped will soon be used by doctors, say it is an opportunity to end this clinical bias.

A trial of 10,286 patients in six countries found that compared to current testing methods this algorithm, named CoDE-ACS, was able to rule out a heart attack in more than double the number of patients with an accuracy of 99.6%.

Clinical trials are now underway in Scotland with support from Wellcome Leap – which focuses on discovery and innovation to improve human health – to assess whether the tool can help doctors reduce the pressure on overcrowded emergency departments.

Professor Nicholas Mills, professor of cardiology at the Centre for Cardiovascular Science at the University of Edinburgh, who led the research, said: “For patients with acute chest pain due to a heart attack, early diagnosis and treatment saves lives.

“Unfortunately, many conditions cause these common symptoms, and the diagnosis is not always straight forward. Harnessing data and artificial intelligence to support clinical decisions has enormous potential to improve care for patients and efficiency in our busy emergency departments.”

The current gold standard for diagnosing a heart attack is measuring levels of the protein troponin in the blood.

But the same threshold is used for every patient. This means that factors like age, sex and other health problems which affect troponin levels are not considered, affecting how accurate heart attack diagnoses are.

This can lead to inequalities in diagnosis.

CoDE-ACS – which stands for Collaboration for the Diagnosis and Evaluation of Acute Coronary Syndrome – was developed using data from more than 10,000 patients in Scotland who had arrived at hospital with a suspected heart attack.

It uses routinely collected patient information, such as age, sex, ECG findings and medical history, as well as troponin levels, to predict the probability that an individual has had a heart attack.

The result is a probability score from 0 to 100 for each patient.

The AI tool performed well regardless of age, sex, or pre-existing health conditions, showing its potential for reducing misdiagnosis and inequalities across the population.

The researchers say CoDE-ACS has the potential to make emergency care more efficient and effective, by rapidly identifying patients that are safe to go home, and by highlighting to doctors all those that need to stay in hospital for further tests.

The work, funded by the British Heart Foundation and the National Institute for Health and Care Research, has been published in the journal Nature Medicine.

Cardiovascular diseases are the leading cause of death globally with an estimated 17.9 million lives lost. More than four out of five CVD deaths are due to heart attacks and strokes.

The average age of people at the time of their first heart attack is 65.5 years for men and 72 years for women.

According to the British Heart Foundation, as many as 100,000 hospital admissions every year in the UK are due to heart attacks – that’s one every five minutes.

Professor Sir Nilesh Samani, Medical Director of the British Heart Foundation, said: “Chest pain is one of the most common reasons that people present to emergency departments. Every day, doctors around the world face the challenge of separating patients whose pain is due to a heart attack from those whose pain is due to something less serious.

“CoDE-ACS, developed using cutting edge data science and AI, has the potential to rule-in or rule-out a heart attack more accurately than current approaches. It could be transformational for emergency departments, shortening the time needed to make a diagnosis, and much better for patients.”

This new test is the second medical AI-related announcement to be made within a matter of days.

Research led by investigators at Harvard Medical School and the University of Copenhagen in collaboration with VA Boston Healthcare System, Dana-Farber Cancer Institute, and the Harvard TH Chan School of Public Health, demonstrated that AI was able to determine a person’s risk of developing pancreatic cancer with astounding accuracy up to three years prior to their actual diagnoses, based solely on their medical records.

In March this year researchers in Canada announced that artificial intelligence had developed a treatment for the most common type of liver cancer, hepatocellular carcinoma, in just 30 days and could predict a patient’s survival rate.

And AI is already being used to help develop new drugs, in surgery and for personalising treatment.

Of this latest study, Steve Goodacre, professor of emergency medicine at the University of Sheffield, said: “This intriguing study shows how AI can use complex analysis, rather than a simple rule, to improve diagnosis.

This doesn’t (yet) show that we can replace doctors with computers. Experienced clinicians know that diagnosis is a complex business. Indeed, the ‘ground truth’ used to judge whether the AI algorithm was accurate was a judgement made by clinicians.

“It will be interesting to see how clinicians in the emergency department use this algorithm. What will they do if they think the algorithm has got it wrong? The next stage of the research will hopefully answer that question.”

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Shingles vaccine may slow biological ageing in older adults

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Shingles vaccination may slow biological ageing in older adults, research suggests.

The study examined more than 3,800 people aged 70 and older and found that those who received the vaccine showed slower biological ageing on average than unvaccinated individuals.

The study used data from a nationally representative US survey to assess how shingles vaccination related to several measures of biological ageing.

Even when controlling for other sociodemographic and health variables, vaccinated individuals had lower inflammation measurements, slower epigenetic ageing (changes in how genes are switched on or off) and slower transcriptomic ageing (changes in how genes are transcribed into RNA used to create proteins).

The research was carried out at the USC Leonard Davis School of Gerontology, using data from the US Health and Retirement Study.

Shingles, also called herpes zoster, is a painful, blistering skin rash caused by reactivation of the chickenpox virus. Anyone who has had chickenpox is at risk of shingles. While shingles can occur at younger ages, risk is higher for those 50 and older and for immunocompromised people. Vaccination offers protection from shingles and lowers the chance of postherpetic neuralgia, or long-term pain after infection.

While vaccines are designed to protect against acute infection, recent research has highlighted a possible link between adult vaccines, including those for shingles and influenza, and lower risks of dementia and other neurodegenerative disorders, said research associate professor of gerontology Jung Ki Kim, the study’s first author.

“This study adds to emerging evidence that vaccines could play a role in promoting healthy ageing by modulating biological systems beyond infection prevention.”

Biological ageing refers to how the body changes over time, including how well organs and systems are working, unlike chronological ageing, which is simply time passing. Two people who are both 65 years old may look very different inside: one may have the biological profile of someone younger, while another may show signs of ageing earlier.

Kim and coauthor Eileen Crimmins, USC university professor and AARP professor of gerontology, measured seven aspects of biological ageing: inflammation, innate immunity (the body’s general defences against infection), adaptive immunity (responses to specific pathogens after exposure or vaccination), cardiovascular haemodynamics (blood flow), neurodegeneration, epigenetic ageing and transcriptomic ageing. The team also used the measures collectively to record a composite biological ageing score.

Chronic, low-level inflammation is a contributor to many age-related conditions, including heart disease, frailty and cognitive decline. This phenomenon is known as inflammaging, Kim said.

“By helping to reduce this background inflammation, possibly by preventing reactivation of the virus that causes shingles, the vaccine may play a role in supporting healthier ageing. While the exact biological mechanisms remain to be understood, the potential for vaccination to reduce inflammation makes it a promising addition to broader strategies aimed at promoting resilience and slowing age-related decline.”

The effect may persist. When analysing how time since vaccination related to results, Kim and Crimmins found that participants who received their vaccine four or more years before providing their blood sample still showed slower epigenetic, transcriptomic and overall biological ageing on average than unvaccinated participants.

“These findings indicate that shingles vaccination influences key domains linked to the ageing process. While further research is needed to replicate and extend these findings, especially using longitudinal and experimental designs, our study adds to a growing body of work suggesting that vaccines may play a role in healthy ageing strategies beyond solely preventing acute illness.

The work was supported by the National Institute on Aging at the National Institutes of Health. The Health and Retirement Study is supported by the National Institute on Aging.

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Thousands of men in England to be offered life-extending prostate cancer drug

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Thousands of men in England will get the prostate cancer drug abiraterone on the NHS within weeks.

For the first time, patients in England whose cancer has not spread will be able to receive abiraterone as the health service widens access to the treatment.

Around 2,000 men diagnosed in the last three months whose cancer has not spread will get access to the treatment if it is of clinical benefit.

An additional 7,000 men are expected to be diagnosed each year and will be eligible for the drug.

The national clinical director for cancer at NHS England, professor Peter Johnson, said: “For thousands of men with prostate cancer, this treatment option could be life-changing by helping keep their cancer at bay for several years.

“The life-extending treatment available on the NHS within weeks will mean thousands of men can kick-start their year with the news that they will have a better chance of living longer and healthier lives.

“The NHS will continue to work hard to offer people the most effective and evidence-based treatments, with several new prostate cancer drugs rolled over the last five years.”

Abiraterone is a hormone-blocking tablet that helps stop prostate cancer spreading by cutting off the testosterone it needs to grow.

Research has shown that for these earlier-stage patients, survival after six years is improved, with trials showing 86 per cent of men alive after six years on abiraterone compared with 77 per cent on standard treatment (hormone therapy with or without radiotherapy).

NHS England has been able to expand access to the drug for thousands more eligible patients by securing better-value supply, following clinical advice to roll this out last year.

The NHS has set a target to save over £1bn on clinically effective biosimilar drugs during this parliament. Biosimilars are approved, lower-cost versions of biological medicines.

More than eight in 10 drugs the NHS now prescribes are lower-cost biosimilar or generic medicines, creating funding for other treatments.

The NHS in England already commissions abiraterone, now available as a lower-cost generic medicine, for advanced prostate cancer, having introduced a policy to commission the treatment in December 2024, nearly one year ahead of positive NICE guidance recommending it in November 2025.

NHS England has worked with campaigners including Prostate Cancer UK to secure this rollout.

In the past five years alone, the NHS in England has also commissioned targeted prostate cancer therapies, including the branded drugs enzalutamide, darolutamide, relugolix and apalutamide.

The health and social care secretary, Wes Streeting, said: “When you’re living with prostate cancer, every day with your loved ones matters.

“I’m delighted the NHS have taken the steps needed to make the drug available, giving thousands of men access to abiraterone, a treatment that significantly improves survival rates and can give patients precious extra years of life.

“We’re backing the best clinical evidence, making smart funding decisions, and ensuring patients get the care they need when they need it most.

“We’re serious about improving prostate cancer outcomes, treating it faster and giving loved ones more time together.”

In parallel with confirming abiraterone’s commissioning, NHS England will also offer blood plasma treatment for people with the rare condition Clarkson’s Syndrome, and genetic testing for parents with pre-existing conditions going through IVF, following clinical advice and enabled by long-term funding.

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Blood sugar spike after meals may increase Alzheimer’s risk

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Sharp rises in blood sugar after meals may raise Alzheimer’s risk, according to genetic analysis of more than 350,000 adults.

The findings point to after-meal glucose, rather than overall blood sugar, as a possible factor in long-term brain health.

Researchers examined genetic and health data from over 350,000 UK Biobank participants aged 40 to 69, focusing on fasting glucose, insulin, and blood sugar measured two hours after eating.

The team used Mendelian randomisation, a genetic method that helps test whether biological traits may play a direct role in disease risk.

People with higher after-meal glucose had a 69 per cent higher risk of Alzheimer’s disease.

This pattern, known as postprandial hyperglycaemia (elevated blood sugar after eating), stood out as a key factor.

The increased risk was not explained by overall brain shrinkage (atrophy) or white matter damage, suggesting after-meal glucose may affect the brain through other pathways not yet fully understood.

Dr Andrew Mason, lead author, said: “This finding could help shape future prevention strategies, highlighting the importance of managing blood sugar not just overall, but specifically after meals.”

Dr Vicky Garfield, senior author, added: “We first need to replicate these results in other populations and ancestries to confirm the link and better understand the underlying biology.

“If validated, the study could pave the way for new approaches to reduce dementia risk in people with diabetes.”

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