Children's National Heart Institute provides an extensive range of evaluation services for children and adults with congenital heart disease with programs that include fetal echocardiography, general cardiac evaluation, pulmonary hypertension, cardiac transplantation, syncope, electrophysiology, cardiac catheterization and interventions, preventive cardiology and adult congenital through our cardiology outpatient clinics. Please note that it is the policy of Children's National Hospital to ensure a "drug-free" work environment: a workplace free from the illegal use, possession or distribution of controlled substances (as defined in the Controlled Substances Act), or the misuse of legal substances, by all staff (management, employees and contractors).