Actually, there is no telemonitoring program that includes newborns or infants with congenital heart disease awaiting cardiac intervention. This is a vulnerable period, prone to clinical complications, rehospitalization, parental stress, and requires monitoring with clinical and therapeutic optimization. The aim of the study is to assess the feasibility and acceptability of monitoring newborns and infants with congenital heart disease awaiting cardiac surgery using the Blue-Line home telemonitoring program.