It is presented the data base VETUAN I which contein electrocardiographic measures from 100 canine pacients without any cardiac abnormalities examined in the Veterinary Clinic Veteriland at Bogotá, Colombia with professionals from the Veterinary Faculty of Antonio Nariño University. Measures taken were: waves duration and amplitude of cardiac cicles including three bipolar derivations and cardiac axis. The principal objective of this work is to present an actualization that has been used since 1960 when United States made it for the first time. Results showed great variations in the cardiac parameters, so it can be concluded that cardiac dinamycs depends strongly of environmental factors specially the altitude over sea level.