I was born with aortic stenosis and coarctation of aorta and the Evelina performed the operations to save my life. ECHO supports children and young people with heart conditions and their families, who have received treatment at the Evelina London Children's Hospital or at one of the peripheral clinics. Congenital heart disease is the most common birth defect and affects just under 1 in 100 babies born throughout the UK.