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We have compared three of the best QRS detection algorithms, regarding their results, to check the performance and to elucidate which get better accuracy. In the literature these algorithms were published in a theoretical way, without offering their code, so it is difficult to check its real behaviour over different collections of ECG records. This work brings the community our source code of each algorithm and results of its validation over a public database. In addition, this software was developed as a framework in order to permit the inclusion of new QRS detection algorithms and also its testing over different databases.