The ventricular Septum is the wall between the left and right ventricles (lower chambers) of the heart. A hole in the ventricular septum is called a VSD. This hole allows pure blood with oxygen to mix with impure blood returning to the lungs. Over time, irregular heartbeats and other heart problems can happen.
By age 1, most small VSDs close on their own. However, those VSDs that remain open after this age may need to be closed.
Larger VSDs, such as small ones in certain parts of the ventricular septum, or ones that cause heart failure or endocarditis (inflammation), need open-heart surgery. The hole in the septum is most often closed with a patch.
Some septal defects can be closed without surgery. The procedure involves passing a small wire into the heart and placing a patch over the defect.