Doppler Duplex Scan (DDS) is a method, that allows a clear visualization of the blood flow in the vessels. Carotid Doppler is broadly used in investigation of wide spectrum of diseases.
Pathology of the vessels of the neck may be responsible for a variety of symptoms: from headache to periodic loss of consciousness. DDS can show if the blood flow through the vessels that supply brain is restricted.
It can be restricted by a thrombus or a cholesterol plaque. Formation of cholesterol plaques is a consequence of a high level of blood cholesterol combined with damage to the vessel wall. Cholesterol plaques can vary in size and cause different degrees of occlusion. The size and degree of occlusion are the decision point to chose between conservative and surgical treatment.