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External carotid artery embolus with internal carotid artery occlusion with acute ischemic stroke: predictor of cardioembolic etiology
  1. Thomas Tomsick1,
  2. Senthur Thangasamy2,
  3. Thomas Stamatis3,
  4. Pooja Khatri4,
  5. Joseph Broderick4
  1. 1Department of Radiology, University of Cincinnati, Cincinnati, OH, USA
  2. 2Department of Radiology, University of Massachusetts, Worchester, MA, USA
  3. 3Department of Radiology, Ohio State University, Columbus, Ohio, USA
  4. 4Department of Neurology, University of Cincinnati Medical Center, Cincinnati, OH, USA
  1. Correspondence to T Tomsick, University of Cincinnati, 234 Goodman St, Cincinnati OH 45267, USA; tomsicta{at}


Arteriograms performed in the Interventional Management of Stroke studies were analyzed for external carotid artery embolus. Two cases were identified and diagnosed as thromboembolic due to a cardiac origin. This is an uncommon but useful finding on angiography which is helpful for further management. It is hypothesized that finding embolus within the external carotid artery on angiography in stroke patients with internal carotid artery occlusion allows confident ascription to a proximal, usually cardiac, source.

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  • Competing interests None.

  • Patient Consent Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.