ELECTROCARDIOGRAMS

Electrocardiogram (ECG) electrodes should be taped to the pads of the paws (Figure 19 below) on the left forelimb (black lead), right forelimb (white lead), and left hind limb (red lead). Three-lead ECGs are sufficient. Canine ECG complexes resemble human complexes, with minor variations in key ECG intervals and possible inverted T-waves. Electrode or ultrasound gel may be required between the electrode and footpads to improve contact.