The outline of the Prototype Algorithm, software package for computerized electrocardiography, is described. The developed module-based ECG analysis program consists of system interface, beat detection, feature extraction, rhythm analysis and diagnostic module. The overall evaluation of the proposed algorithm was done using the CSE library. The CSE diagnostic library and evaluation methods, which developed for evaluation of ECG analysis program are introduced. The prototype' s beat marker position is satisfied with recommended range of CSE median results. The performance of proposed algorithm compared with clinical truth and commercial programs. Now is the time to start to modify and revise the program in order to achieve the reliable performance, responding to the complaints of clinicians and making use of the EGG database, which is developing continuously.