We're not going to discuss any abnormalities that might exist within the heart and that might be described by an abnormal electrocardiogram. So we're simply going to focus on the brief details of a normal electrocardiogram. So let's take a look. By taking a cross section of our heart, we basically expose the four different chambers. So if we're examining the heart from this angle, we have the right side and the left side. So this is the right side of the heart, the left side of the heart, the right atrium, right ventricle, the left atrium and our left ventricle.