A Ventricular Septal Defect (VSD) is a congenital heart condition characterized by a hole in the wall (septum) that separates the heart's two lower chambers, known as the ventricles. This defect allows blood to flow from the left ventricle to the right ventricle, which can lead to increased blood flow to the lungs and potential heart complications. Symptoms of VSD can vary based on the size of the defect. Small defects may cause no symptoms, while larger ones can lead to shortness of breath, fatigue, and heart murmurs. Treatment options include monitoring, medication, or surgical repair, depending on the severity of the condition.