Scott was a junior doctor at
Liverpool, where she worked with the cardiologist
John Hay and developed an interest in children's
congenital heart defects. Her postgraduate research with Hay earned her a doctoral degree in 1957. The same year, she became the first person in the UK to perform a
balloon atrial septostomy after learning how to perform the procedure from its inventor,
William Rashkind. In 1976, she established the first unit in a British hospital dedicated to non-invasive cardiac diagnosis through
echocardiography, at Killingbeck. Scott's most famous research work was a collaboration with her husband James Scott: they showed an association maternal
anti-Ro and
anti-La autoantibodies and congenital
heart block in their children. She also co-authored a key textbook,
Heart Disease in Paediatrics, which was first published in 1973 and was revised in three editions. In her career, she trained many foreign doctors in her speciality. She was often known for her perfect English diction, and this helped her in her foreign affairs. ==Later life==