Atrial Septal Defect (ASD) is a congenital heart condition characterized by a hole in the wall between the heart's upper chambers, which can lead to serious complications if not treated. Although small defects may close on their own, larger ones require intervention like percutaneous closure using devices such as the Amplatzer Septal Occluder to prevent heart and lung damage. Ventricular Septal Defect (VSD) is another condition affecting heart structure, with types classified based on location and impact on blood flow, requiring careful management and potential surgical intervention.