Dr. Douglas is a Consultant Cardiologist with specializations in adult congenital heart disease and heart disease in pregnancy. She received her primary medical degree from Queen's University Belfast and completed most of her medical training at the Royal Victoria Hospital in Belfast before joining Guy's and St Thomas' as a Sub-Specialty Fellow. Since January 2020, she has been working as a Consultant within the Adult Congenital Heart Disease and General Cardiology Team, where she leads the Heart Disease in Pregnancy Team and contributes to the management of pulmonary hypertension.

Dr. Douglas has additional skills in transthoracic and transoesophageal echo, both day case and peri-procedural (catheter intervention and cardiac surgical). She has also conducted research on chronic total occlusive coronary disease with the use of cardiac MRI, cardiomyopathy in pregnancy, placental dysfunction and identification in cardiovascular risk factor prediction, as well as pulmonary hypertension in pregnancy and long-term cardiovascular health in women of childbearing age.