Mbuyi Mukendi Eugène, Kafunda Katalayi Pierre, Mbuyi Badibanga Steve, Mbuyi Mukendi Didier

Data mining is a set of methods and techniques for exploring and analyzing automatically or semi-automatically databases in order to detect rules, associations, unknown or hidden trends, specific structures that restore most of the useful information while reducing the amount of data.This is a process of extracting valid and tractable knowledge from large amount of data.In this paper, we present a contribution on the extraction of useful knowledge from databases on patients with high blood pressure from one of the hospital in Kinshasa (RD Congo), using multilayerneural networks.

Key words: Datamining, extraction of knowledge, database,Neural Network, algorithm, high blood pressure.