ARTERIAL STATIONARY WAVES

¹ Instructor in Radiology, Harvard Medical School; Associate Radiologist, Massachusetts General Hospital, Boston, Massachusetts

Six angiograms (of 3 patients) showing stationary wave formation involving the internal carotid artery were found on detailed review of 2,000 carotid angiograms, an incidence of 0.3 per cent. In general, the carotid changes were less striking than those seen in many other peripheral arteries involved in other patients. Subarachnoid hemorrhage had occurred in each patient. These patients were all young adults, each in the third decade.

A series of roentgenograms of this condition in other arteries, including an example in the splenic artery, involvement of which has not previously been recorded, confirms the striking similarity of the arterial configuration, independent of the artery involved. The findings indicate that the phenomenon is not an expression of segmental arterial spasm and evidence is presented to confirm the theory of Theander, that the appearance is due to a passive change in the arterial wall resulting from reflection of the arterial pressure wave, amplified by resonance.

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