A ventricular septal defect (VSD) is a hole in the wall that separates the heart's two lower chambers. There are many different kinds of VSDs; some require early surgical repair, while others may only require observation.
In rare cases, large uncorrected VSDs can lead to pulmonary hypertension and low oxygen levels in the blood. Follow-up appointments in adulthood are essential to screen for residual defects and complications resulting from unrepaired defects.
