Significance of Eustachian valve in paradoxical cerebral embolism

DOI 34 References
  • Kato Yuji
    Department of Neurology and Cerebrovascular Medicine, Saitama International Medical Center, Saitama Medical University
  • Dembo Tomohisa
    Department of Neurology and Cerebrovascular Medicine, Saitama International Medical Center, Saitama Medical University
  • Takeda Hidetaka
    Department of Neurology and Cerebrovascular Medicine, Saitama International Medical Center, Saitama Medical University
  • Tanahashi Norio
    Department of Neurology and Cerebrovascular Medicine, Saitama International Medical Center, Saitama Medical University

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  • 奇異性脳塞栓症におけるＥｕｓｔａｃｈｉａｎ　ｖａｌｖｅの意義

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The Eustachian valve (EV) is an embryological remnant of the inferior vena cava (IVC) valve thatprenatally directs the oxygenated blood from the IVC across the patent foramen ovale (PFO) into systemic circulation. Even when the EV is prominent, it is usually considered to be a benign finding in the absence ofassociated cardiac anomalies. We present a patient with PFO whose prominent EV increased spontaneousright-to-left shunt and promoted paradoxical cerebral embolism. EVs may persist more frequently than expected in Japan and should be considered adjunctive risk factors for paradoxical cerebral embolismirrespective of their size in patients with PFO.

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