Pre-operative electrocardiographic evaluations were done in 474 male and female dogs to analyze the frequency of electrocardiographic alterations and its relation with the surgical indication according to age, breed, weight, body score (obesity), and history and physical signs of cardiac diseases. The electrocardiographic alterations occurred in 220 (46%) animals, being more frequent in males (n=116; 52.7%). The increase in QRS duration was the most observed alteration (n=54; 24.5%). The electrocardiographic alterations in the pre-operative are common, which suggests that the performing of electrocardiographic exam in the pre-operative is independent of the age, weight, surgical problem, or signs of cardiopathy on clinical exam.
dog; electrocardiogram; pre-operative; arrhythmia
