There are many indications for surgery in VSD
"Infants with large left-to-right shunts with clinical symptoms (e.g., failure to thrive, treatment-resistant congestive heart failure)
Asymptomatic older children with large left-to-right shunts or evidence of left atrium or left ventricular dilatation
VSD with aortic insufficiency or aortic valve prolapse into the VSD
Pulmonary hypertension
AMBOSS article
https://next.amboss.com/us/article/4403jT?q=VSD#UEXbE-
More importantly, severe pHTN is a contraindication for surgery
UTD :"Contraindications — VSD closure is generally contraindicated in patients with severe pulmonary hypertension (defined as pulmonary vascular resistance [PVR] >12 Wood units [WU]∙m2). "




