We're 11 months old. We took our medical card for a checkup in a year,…

We're 11 months old. We took our medical card for a checkup in a year, I found out that at 9 months we went for the scheduled appointment and they wrote us a diagnosis - congenital heart septum anomaly unspecified, is this normal? Because nobody ever told us about such thing, the baby was born healthy, without any pathologies.