Cardiac arrhythmia also affects young athletes, regardless of the correct lifestyle or active lifestyle. A young professional hockey player (for reasons of anonymity, we intentionally withhold his first name) faced unexpected health complications. His attending physician recommended the Kardi Ai to obtain as many ECG recordings as possible to possibly refine the diagnosis. Thanks to the quality and quantity of ECG recordings through Kardi Ai, his diagnosis was even changed and he immediately underwent a procedure that eliminated the cause of the health problems. In this case, Kardi Ai helped the doctor change the diagnosis and act in time.