A smart stethoscope combined with an artificial intelligence (AI) algorithm could enable earlier diagnosis of heart failure and improved patient outcomes, researchers have found.
The team from the National Heart and Lung Institute (NHLI) and Imperial’s Centre for Cardiac Engineering have completed the first NHS study to evaluate an artificial intelligence (AI) technology for point-of-care detection of heart failure.
Using a ‘smart’ stethoscope, the Eko DUO device, which records electrocardiograms (ECGs) as well as heart sounds, the researchers applied the novel AI algorithm that determines within 15 seconds whether the pumping action of their hearts is weakened, providing an immediate diagnosis of heart failure.
The study team found that the AI technology showed 91 per cent sensitivity and 80 per cent specificity when compared to the routine diagnostic tests that are invasive and expensive.
Study lead Professor Nicholas Peters, head of cardiac electrophysiology, said: “This tool is a game-changer because our study shows that GPs will be able to use it in a way that fits how they examine patients to reliably rule in or rule out heart failure at the time.
“The result will be earlier diagnosis and treatment, avoidance of unnecessary and expensive tests in those in whom heart failure is ruled out, and therefore enable better and more cost-effective healthcare.
“This study lays the foundation for deploying this AI technology to unlock the clinical and health economic benefits of early diagnosis.
“We will now be starting the study to prove the magnitude of this benefit in many urban and rural GP practices across the UK, with a view to producing the evidence for NHS wide adoption.”
Heart failure is a condition in which the heart cannot pump blood effectively. It carries a higher risk of death than most cancers and is increasingly common, affecting 2 per cent of the UK population and consuming 4 per cent of the NHS budget.
Reliably diagnosing heart failure is a major challenge for GPs as the symptoms, such as breathlessness are associated with many other conditions.
Most patients who have heart failure are diagnosed in hospital after a series of tests, highlighting the need for a point-of-care screening tool.
Dr Patrik Bachtiger, a clinical research fellow in Digital Health at the NHLI, said a lack of effective tools for GPs to confirm or rule-out heart failure leads to late diagnosis, substantially greater NHS cost and earlier death in 80 per cent of cases.
“This super-human capability to screen patients at any point of care, including the GP surgery, can overcome the unacceptable reality that 80 per cent of patients with heart failure are currently diagnosed through an emergency hospital admission.
“The current clinical pathway simply misses too many patients, leaving them undiagnosed until very sick. This tool can save time and money for the NHS and unlock major benefits for patients through early diagnosis and starting effective treatments.”