Publications by authors named "Koh Nakachi"
An 82-year-old man had a transient ischemic attack (TIA) with symptoms of consciousness disturbance and right hemiparesis while resting in a sitting position after breakfast. His symptoms improved around 1 h after onset when he lied in a supine position and received intravenous hydration. Duplex carotid ultrasonography revealed severe stenosis of the left common carotid artery.
View Article and Find Full Text PDFWe herein report an unusual case of profound brain infarction of the posterior circulation due to a dolichoectatic vertebrobasilar dissecting aneurysm (DVDA) originating from atherosclerosis. On autopsy, diffuse atherosclerosis was observed with a multi-fusiform aneurysm measuring 1 to 2 cm in diameter ranging from the left vertebral artery to the basilar artery. The microscopic findings of the aneurysm revealed severe stenosis of the artery caused by intimal thickening, intimal flap formation and thrombosis, indicating the presence of a dissecting aneurysm originating from atherosclerosis.
View Article and Find Full Text PDFThe intima-media thickness (IMT) of the brachiocephalic trunk (BCT) can be measured using duplex carotid ultrasonography, which is used for imaging the common carotid artery (CCA). However, the clinical significance of the BCT-IMT has not been studied. We reviewed 1109 stroke-free participants in the registry of the Okinawa General Health Maintenance Association.
View Article and Find Full Text PDFArticle Synopsis
- * Among 65 patients studied, 34% experienced EMW, with higher HbA1c levels in those affected (7.9% vs. 6.3%), and a greater percentage of EMW patients had intracranial artery stenosis.
- * Factors like HbA1c levels ≥7.0% and the presence of ICAS were found to significantly increase the risk of EMW, particularly when combined, highlighting their importance in patient prognosis.
We report on transoral carotid ultrasonography using a micro convex probe with B-flow imaging for determining spontaneous extracranial internal carotid artery dissection just below the petrous portion. A 49-year-old man suffered cortical and subcortical infarction in the region of the right middle cerebral artery. Magnetic resonance angiography on the third day of admission revealed spontaneous recanalization of the right internal carotid artery associated with an intimal flap-like structure at the petrous portion.
View Article and Find Full Text PDFBackground And Purpose: The purpose of this study was to clarify the differences in the acute blood pressure course among different ischemic stroke subtypes.
Methods: We divided 588 consecutive patients with acute brain infarction into four clinical subgroups to study the blood pressure levels during the initial 6 hospital days.
Results: During the 6 days, systolic blood pressure of lacunar and atherothrombotic patients was higher (P=0.