Electrocardiology deals with the description of intracardiac bioelectric phenomena and the ex- tracardiac electric field generated in the human body. It has been increasingly supported by the mathematical and numerical computational models. The formulation of models at both cellular and tissue levels provide essential tools in order to increase the knowledge of this phenomena. On the other hand, electrocardiography is the process which permits recording this electrical activity of the heart over a period of time using electrodes placed on the skin. This article presents a computational model of the heart that is compared with an electrocardiogram obtained in the laboratory using an electrocardiograph of own construction. 2015/2016