Tricky and interesting carotid cases.

In many instances, ultrasound examination of the carotid arteries is a straightforward matter, with easily recognized atherosclerotic disease and well-defined parameters for assessment of carotid obstruction. In some circumstances, however, hemodynamic conditions may skew the Doppler velocity and waveform findings in potentially confusing ways, possibly cause misdiagnosis. This is the "tricky" aspect of carotid sonography of which all vascular ultrasound practitioners must be wary.