Can you explain results of left carotid artery is 194cm with plaque visual what should be done?

194 cm???: There are a number of different criteria for determining how much narrowing is in the carotid artery based on what velocities are measured. A single value would be difficult to convert to a degree of stenosis. In general the higher the velocity the greater the narrowing. A peak systolic velocity, an end diastolic velocity and a ratio between internal and common carotid velocities are needed.