Publications by authors named "Hideki Kiriyama"

Objective: We report the case of a cavernous sinus dural arteriovenous fistula (CSdAVF) treated by transvenous embolization (TVE) via the jugular venous arch (JVA) connecting bilateral superficial cervical veins.

Case Presentation: A male patient in his 50s presenting with diplopia and headache was diagnosed with a CSdAVF. The first session of TVE resulted in incomplete obliteration of the fistula due to poor accessibility through the inferior petrosal sinus (IPS), and postoperative computed tomography angiography (CTA) disclosed a newly developed drainage route into the facial vein (FV) connecting to the anterior jugular vein (AJV) and the JVA.

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Objective: To describe our 1-year experience of the practical use of a mobile communication application by our stroke team.

Methods: The mobile Join application (Allm Inc., Tokyo, Japan) was introduced into our stroke team for the purpose of immediate sharing of the patient information.

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Article Synopsis
  • Most patients with takotsubo cardiomyopathy generally recover well, but complications, including potential strokes, can occur, and the relationship between the two is still not fully understood.
  • A case study of a 44-year-old woman demonstrated that her cerebral infarction was linked to takotsubo cardiomyopathy, characterized by prior chest discomfort, hemiparesis, and specific MRI findings showing blockage of a cerebral artery.
  • Upon reviewing 19 additional cases, it was noted that thromboembolic events often emerge about a week after the onset of takotsubo symptoms, indicating that patients may require closer monitoring and anticoagulant therapy if they exhibit signs of cardiac thrombus.
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Clinical data from Japan on the safety and real-world outcomes of alteplase (tPA) thrombolysis in the extended therapeutic window are lacking. The aim of this study was to assess the safety and real-world outcomes of tPA administered within 3-4.5 h of stroke onset.

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A 62-year-old man with high fever and in a state of disorientation was transferred to our hospital. One year before this transfer, he had undergone total arch replacement surgery for thoracic aortic dissection. On admission to our hospital, head MRI revealed multiple brain abscesses in the territory of the vertebral-basilar artery, and chest CT showed gas around the aortic graft, in particular, at the origin of the left subclavian artery.

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Background: Alteplase, a recombinant tissue plasminogen activator (tPA), was approved for patients with acute ischemic stroke within 3 hours of stroke onset in Japan in October 2005 at a dose of 0.6 mg/kg. The aim of this study was to assess the safety and efficacy of alteplase in elderly patients in Japan.

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A 56-year-old man with ruptured right P2-P3 junction aneurysm and a 66-year-old man with ruptured left P2-P3 junction aneurysm of the posterior cerebral artery associated with acute-stage packed intraventricular hemorrhage. The aneurysms were successfully clipped through the transcortical transchoroidal fissure approach. This approach requires less retraction of the temporal lobe, provides a wider surgical field, and the P2 segment can be easily reached.

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Purpose: In this study, we tried to show that EEG and magnetoencephalography (MEG) are clinically complementary to each other and that a combination of both technologies is useful for the precise diagnosis of epileptic focus.

Methods: We recorded EEGs and MEGs simultaneously and analyzed dipoles in seven patients with intractable localization-related epilepsy. MEG dipoles were analyzed by using a BTI Magnes 148-channel magnetometer.

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