Abstract
✓ Ultrasonic echoes from an artery, registered on an oscilloscope screen as vertical deflections from a horizontal baseline, exhibit pulse-synchronous displacements on the x-axis as well as variations in amplitude. The visualization of these echo movements can constitute the basis for an evaluation of arterial conditions comparable to palpation of the pulse but has the advantage of being applicable to arteries that cannot be palpated. The method has been applied to the internal carotid artery in 325 patients, and an evaluation of the method is given on the basis of a comparison with 166 angiograms of the artery. The method has proven to be a valuable diagnostic aid in studying patients suspected of having carotid artery disease.
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