Michael John Tynan (born 18 April 1934) was Professor of Paediatric Cardiology at Guy's Hospital (1982–99) and is a member of Cambridge University’s Paediatric Cardiology Hall of Fame.^[1][2]

Tynan was born on 18 April 1934, the son of Jerry Joseph Tynan (a Squadron Leader in the Royal Air Force)^[2] and Florence Ann Tynan.^[1] He was educated at Bedford Modern School and the London Hospital.^[1]

Tynan was a Teaching Fellow at the Harvard Medical School (1962)^[2] and a Senior Assistant Resident at the Boston Children’s Hospital in Massachusetts (1962).^[1] He was Registrar of Westminster Hospital (1964) and Registrar (later Lecturer) at Great Ormond Street Hospital (1966).^[1] Tynan was also consultant paediatric cardiologist at Newcastle University Hospitals (1971) and at Guy’s Hospital (1977) before taking up his professorship at Guy’s Hospital in 1982.^[1]

Tynan married Eirlys Pugh Williams in 1958.^[1] He is a member of the Athenaeum Club, London.^[1]

• Paediatric Cardiology, a Textbook, 1983 (jointly)^[1]
• Articles on Nomenclature and Classification of congenital heart diseases and on heart diseases in children^[1]