Angiology is concerned with the body's complex system of blood vessels, particularly the arteries and veins.

The angiologist knows about the structure and characteristics of the various blood vessels in the body. He is a specialist in all the changes that can occur in these vessels. His area of expertise includes, therefore, disorders such as the narrowing or closure, dilation and inflammation of the vessels. In order to be able to determine exactly how a vessel has changed, he is able to carry out a variety of examinations, e.g. a Doppler ultrasound test, oscillography (measuring the fluctuations in volume of the extremities) or even a test run on a jogging machine.

The angiologist knows about the various ways of treating vessels that have undergone change. For example, he will remove varicose veins using a method known as 'stripping', deal with spider veins or remove blockages in blood vessels by means of a surgical intervention. In such cases he works with a vascular surgeon, a specialist in blood vessel surgery.