To diagnose heart conditions including heart attacks and heart rhythm disturbances, clinicians typically rely on 12-lead electrocardiograms (ECGs) — complex arrangements of electrodes and wires placed around the chest and limbs to detect the heart’s electrical activity. But these ECGs require specialized equipment and expertise, and not all clinics have the capability to perform them. Scientists showed that, with help from an AI tool, cardiologists can diagnose heart attacks using a simpler, easier and more accessible electrocardiogram technology.