In the first real-world trial of the AI tool, it was found to improve treatment for up to 45 per cent of patients. In around three quarters of cases, there is no clear sign of significant narrowings, so patients are often reassured and discharged. Analysis comparing the use of the AI tool to standard care revealed it was highly cost-effective for the NHS. Here we demonstrated that providing an accurate picture of risk to clinicians can, alter and potentially improve the course of treatment for many heart patients. 'We hope that this AI tool will soon be implemented across the NHS, helping prevent thousands of avoidable deaths from heart attacks every year in the UK.'