One averaged heartbeat per patient, from real PTB-XL ECGs. Grey-blue is a normal heart, coral is the selected condition. Beats are lined up on the R peak, so the moving dots show both hearts at the same moment.
Dots along the thick loops are every 20 ms. Where they bunch up, the electrical wave is travelling slowly through the heart.
Each condition is one patient, so some differences are just normal variation between people. The 3D vector is estimated with the Kors matrix, which is fitted to average adults. For learning only. This is not a medical device. Data: PTB-XL (Wagner et al., 2020), PhysioNet, CC BY 4.0.