The advice is based on evidence from research, where available, and on the opinion of experts, where no evidence exists.

These groups of people can fly without any special treatment:

·   People with mild angina (chest pain) that only happens during moderate exercise, whose condition and medicine has not changed recently

·   People with mild heart failure, which causes breathlessness on mild to moderate exercise, whose condition and medicine has not changed within six weeks

·   People with occasional heart palpitations or irregular heartbeat, whose condition doesn't cause fainting and who are being treated.

People with more serious angina and heart failure, or people born with heart problems, are advised to consider whether they need extra assistance at the airport, and oxygen during their flights. If they are getting symptoms that indicate their condition might get suddenly worse, they are advised to wait until their condition is stable before travelling by air. More