Dutra Silveira, Solimar, Bruna Gabriela Gheller, and Andréa Christina Ferreira Meirelles. 2018. “Preoperative Electrocardiographic Study of Dogs at the Veterinary Hospital of Pontifícia Universidade Católica Do Paraná”. Brazilian Animal Science/ Ciência Animal Brasileira 19 (April). Goiânia:1-12. https://doi.org/10.1590/cab19049000.