AI stethoscope can help spot life-threatening heart disease years earlier, study finds
A stethoscope that uses artificial intelligence could help doctors detect serious heart valve disease years earlier, potentially saving thousands of lives, a new study suggests.
It is estimated that 41 million people worldwide, including 1.5 million people in the UK, live with a type of heart valve disease, which can lead to heart failure, hospital admissions and death.
Early diagnosis is vital for successful treatment, but the condition can be symptom-free in its early stages before causing dizziness, shortness of breath and heart palpitations, which can be confused with other conditions, meaning some patients do not get a diagnosis until the disease is advanced.
Currently, diagnosis of valve disease relies on echocardiography, a type of ultrasound scan that is expensive and time-consuming. While doctors do listen to the heart using a stethoscope, this is not routinely done in short GP appointments, and is known to miss many cases.
But the new technology that works with digital stethoscopes was found to outperform GPs at detecting valve disease, and could be used as a rapid screening tool.
“Valve disease is a silent epidemic,” said Professor Anurag Agarwal from Cambridge’s department of engineering, who led the research. “An estimated 300,000 people in the UK have severe aortic stenosis alone, and around a third don’t know it. By the time symptoms appear, outcomes can be worse than for many cancers.”
For the study published in the journal npj Cardiovascular Health, researchers analysed heart sounds from nearly 1,800 patients using an AI algorithm trained to recognise valve disease.
The AI was found to correctly identify 98% cent of patients with severe aortic stenosis, the most common form of valve disease requiring surgery, and 94% cent of those with severe mitral regurgitation, where the heart valve does not fully close and blood leaks backwards across the valve.
Source: The Independent, 10 February 2026