25days baby systolic murmur.

I was told my baby has systolic murmur and was asked to get echocardiogram done. The doctor suggested to do it from a very specific clinic & doctor considering proximity to my home. My baby is just 25 days old. In first check up the murmur wasn’t diagnosed but now doctors says there is an additional sound after the heartbeat , so there might be a hole in the baby's heart either on the ventricles or the membrane. I read a lot on Internet out of tension and it was mentioned in most articles that it is quite normal and harmless. But the abnormal murmurs can be serious and even life threatening. Any advice/suggestions to get this checked in JP Nagar, Bangalore? Also will it be fine to get the echocardiogram done from the general lab centre's and carry the report to any paediatrician?