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  • Title: Oscillating thromboemboli within the extracranial internal carotid artery demonstrated by ultrasonography in patients with acute cardioembolic stroke.
    Author: Kimura K, Yasaka M, Minematsu K, Wada K, Uchino M, Yonemura K, Ogata J, Yamaguchi T.
    Journal: Ultrasound Med Biol; 1998 Oct; 24(8):1121-4. PubMed ID: 9833579.
    Abstract:
    We detected oscillating thromboemboli at the extracranial internal carotid artery (ICA) by duplex carotid ultrasonography in patients with acute cardioembolic stroke. Using B-mode ultrasonography, we evaluated the extracranial ICA in 11 patients with acute cardioembolic ICA occlusion. A homogeneous, elastic, oscillating intraluminal mass echo originating in the extracranial ICA extended distally in 5 (46%) of these patients. The echoes moved quickly and distally during the systolic phase of the cardiac cycle and returned slowly to the original position during the diastolic phase. We performed a postmortem study 24 days after stroke onset in 1 patient with an oscillating intraluminal mass echo that had been demonstrated by duplex ultrasonography. The ICA lumen was obstructed with a fresh string-like thrombus. The findings of oscillating intraluminal mass echo may help establish a diagnosis of acute embolic ICA occlusion.
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