Leads V3 and V4 provide a view of which ventricle's condition?

Leads V3 and V4 are positioned over the left side of the chest and are specifically placed to provide an anterior view of the heart. They primarily reflect the electrical activity of the left ventricle, which is the main pumping chamber responsible for supplying oxygenated blood to the body.

When analyzing a 12-lead ECG, lead V3 and V4 help assess conditions associated with the left ventricle, including ischemia or infarction in this region. Anterior wall myocardial infarctions are typically indicated by changes in these leads due to their position on the chest wall corresponding to the left ventricle.

The other choices do not align with the role of these leads. For example, the right ventricle’s activity is better assessed through leads V1 and V2, which are located nearer to that chamber. Importantly, there is no anatomical entity known as a pulmonary ventricle in human anatomy, thus that choice is not valid. Consequently, focusing on the left ventricle's condition via leads V3 and V4 highlights their function in cardiovascular assessments.