Electrocardiograph measures the electrical activity of the heart. Just like us, dogs and cats have electrodes attached (we need to clip hair for this) and we record the electrical impulses in the heart which determine the way it contracts and allows us to determine if there is an amnormailty.

We often use this if a dog has a history of collapse, especially with exercise and we frequently use ecg at the same time as ultrasound when we are scanning the heart for abnormailities.

ECG is often used at the same time as we perform ultrasound examinations on hearts to allow us to determine if the contactions and electricsal impulses are interacting properly.