Parent Information

Ventricular Septal Defect (VSD)

The heart is split into four parts. Two collecting chambers at the top called Atria and two pumping chambers at the bottom called Ventricles. A Ventricular septal defect (VSD) is a therefore a hole between the bottom two chambers - the Ventricles. There should not normally be a hole in this position as it allows blood to mix between sides which should normally be separated. This is the most common heart defect and in many cases may close itself however there are some which require closure (almost always with surgery) if they are too large or causing problems such as excessive fluid on the lungs or poor weight gain in a baby.