Can a ventricular septal defect (VSD) heal spontaneously?

Spontaneous closure of ventricular septal defect (VSD) is possible, with the likelihood of closure depending on both the size of the defect and the child’s age. Small VSDs may gradually close during infancy, whereas moderate-to-large defects cannot close spontaneously and will persistently affect cardiac structure. If a child exhibits delayed growth and development or shortness of breath after physical activity, prompt medical evaluation is essential.

Small VSDs—particularly those with robust tissue growth at the defect margins—may progressively close as the child grows. In such mild cases, shunt volume is minimal, placing no additional burden on the heart and lungs and thus not interfering with normal development. Parents need only schedule regular echocardiographic follow-ups to monitor the progress of spontaneous closure.

Moderate-to-large VSDs cause significant left-to-right shunting, increasing ventricular workload and potentially leading to cardiac enlargement and recurrent pulmonary infections. These defects have no potential for spontaneous closure and require surgical repair or transcatheter device closure during early childhood to correct the shunt, preserve cardiopulmonary function, and prevent long-term structural damage to the heart.

In daily life, ensure optimal care for the child: provide balanced nutrition, guarantee adequate rest, minimize vigorous running and excessive crying, and take precautions against respiratory infections—thereby supporting steady, healthy development of the heart and lungs.