The EC-2H device records two independent ECG channels for 24 hours. The analysis program performs automatic QRS detection, classification, and rhythm analysis that can be interactively modified by the user. The analyzing program performs the time based HRV, AF and ST analysis of the 24 hours recordings. The transparency and the interpretation of the results are aided by the color coded graphs and tables. The decision criteria may be changed, the classified beats and event segments may be redefined. The quick and precise evaluation of the recordings is helped by the efficient decision making algorithms, the availability of a native language version and the option for the generation of simple summarizing reports make the system easy to use.