A ventricular septal defect, or VSD, is a congenital heart condition sometimes referred to as a hole in the heart. The hole is in the muscular wall separating the heart’s two lower chambers – the ventricles. Blood can pass through this hole, from the left side of the heart to the right side. Because of this inefficient blood flow, the heart is forced to work harder.
In most cases, VSD is diagnosed shortly after birth. VSDs cause a distinctive heart murmur, caused by blood flowing backward from the left ventricle into the right ventricle. Doctors can generally hear this with a stethoscope.
Holes that are small have a 75% chance of closing on their own, without further treatment. If the hole is larger, there’s only a 5-10% chance that it will close on its own.