The complications of ventricular septal defect mainly include the following: 1. Causes infective endocarditis, with the highest incidence occurring between the ages of 15 and 29; 2. Leads to aortic valve insufficiency; 3. Causes conductive blockages; 4. Leads to heart failure, and can even lead to Eisenmenger syndrome. Therefore, patients with ventricular septal defects should actively complete examinations such as echocardiography. If there are indications for surgery, they should promptly visit a cardiac surgeon for active surgical treatment to correct the anatomical abnormalities of the ventricular septal defect and prevent the condition from worsening and leading to serious consequences.