Abstract: A method and a system of evaluating data picked-up by means of a long term ECG device and stored in a permanent memory, is characterized in that, in a first step, a transfer is effected of the data of the permanent memory onto a data carrier independent from the long term ECG device, with a brief evaluation of the data being simultaneously carried out; and in that, in a second step, the data transferred to the independent data carrier is subjected to detail evaluation at an evaluation center.