Telecardiology includes the ECG holter diagnosis service. The ECG holter is a procedure that allows continuing monitoring of electrical activity of the heart during normal daily activities for at least 24 hours in outpatient conditions. In a telemedicine access centre, a physician places a holter in a patient, and the digital record is sent to a specialist to a remote location based on which the diagnosis is made. The opinion and finding of the specialist are sent through the telemedicine system to the access centre. The telemedical ECG holter service significantly reduced waiting lists and costs of providing this health service, avoiding the unnecessary travel of patients and increasing the availability of specialist health services in outpatient clinics.