England [UK], March 28 : In a Leicester study to see if artificial intelligence (AI) could identify whether a person was in danger of a deadly cardiac rhythm, an AI tool accurately detected the condition 80 per cent of the time.
The study's findings, led by Dr Joseph Barker in collaboration with Professor Andre Ng, Professor of Cardiac Electrophysiology and Head of the Department of Cardiovascular Sciences at the University of Leicester and Consultant Cardiologist at the University Hospitals of Leicester NHS Trust, were published in the European Heart Journal - Digital Health.
Ventricular arrhythmia (VA) is a cardiac rhythm disorder that originates in the bottom chambers (ventricles), where the heart beats so quickly that blood pressure decreases, leading to loss of consciousness and abrupt death if not treated promptly.
NIHR Academic Clinical Fellow Dr Joseph Barker co-ordinated the multicentre study at the National Institute for Health and Care Research (NIHR) Leicester Biomedical Research Centre and co-developed an AI tool with Dr Xin Li, Lecturer in Biomedical Engineering, School of Engineering. The tool examined Holter electrocardiograms (ECGs) of 270 adults taken during their normal daily routine at home.
These adults had the Holter ECGs taken as part of their NHS care between 2014 and 2022. Outcomes for these patients were known, and 159 had sadly experienced lethal ventricular arrhythmias, on average 1.6 years following the ECG.
The AI tool, VA-ResNet-50, was used to retrospectively examine 'normal for patient' heart rhythms to see if their heart was capable of the lethal arrhythmia.
Professor Ng said, "Current clinical guidelines that help us to decide which patients are most at risk of going on to experience ventricular arrhythmia, and who would most benefit from the life-saving treatment with an implantable cardioverter defibrillator are insufficiently accurate, leading to a significant number of deaths from the condition."
"Ventricular arrhythmia is rare relative to the population it can affect, and in this study, we collated the largest Holter ECG dataset associated with longer-term VA outcomes.
"We found the AI tool performed well compared with current medical guidelines, and correctly predicted which patient's heart was capable of ventricular arrhythmia in 4 out of every 5 cases.
"If the tool said a person was at risk, the risk of lethal event was three times higher than normal adults.
"These findings suggest that using artificial intelligence to look at patients' electrocardiograms while in normal cardiac rhythm offers a novel lens through which we can determine their risk, and suggest appropriate treatment; ultimately saving lives."
He added, "This is important work, which wouldn't have been possible without an exceptional team in Dr Barker and Dr Xin Li, and their belief and dedication to novel methods of analysis of historically disregarded data."
Dr Barker's work has been recognised with a van Geest Foundation Award and Heart Rhythm Society Scholarship and more research will be carried out to develop the work further.
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