Cardiac rhythm is an electrical impulse generated by highly specialized fibres capable of spontaneously producing and propagating electrical impulse in the myocardium. From: Medicine, 2022.

Source: https://www.sciencedirect.com/topics/medicine-and-dentistry/heart-rhythm#:~:text=Cardiac%20rhythm%20is%20an%20electrical,From%3A%20Medicine%2C%202022