This work aims to share the experience and results of an extension project, which enables the practice of teaching and research for undergraduate students in “Veterinary Medicine. The Veterinary Electrocardiography Database” project started in 2012, with the purpose of making the electrocardiogram (ECG) accessible to veterinary patients treated in the city of Pirassununga, State of São Paulo, and region, in addition to offering theoretical and practical training in ​cardiac electrophysiology for students. In these nine years, 103 undergraduate students participated in the project and the ECG was performed on 1,291 animals of different species. In addition to the diagnosis or exclusion of cardiac arrhythmias in the animals, the students also organized events for the community and developed research projects. The storage of ECG in an online database generates teaching resources, based on practical experiences, for several mandatory subjects of the course. Specialized care for animals is one of the ways to return part of society’s investment in the training of students from public universities; in addition, the results of this project demonstrated that it is possible to conciliate extension, teaching and research activities.