How many people are affected by Ventricular septal defect?

Ventricular septal defect (VSD) is a common congenital heart defect, affecting approximately 3 to 6 per 1,000 live births. The prevalence can vary based on population and geographic factors. Many individuals with small VSDs may not experience significant symptoms and might not require treatment, while larger defects can lead to more serious complications. Overall, millions of people worldwide are living with VSD, either diagnosed or undiagnosed.