Publications by authors named "Yusuke Sakamoto"

A methanol extract of the flowers of Jasminum sambac (L.) Aiton (Oleaceae) exhibited hepatoprotective effects against d-galactosamine (D-GalN)/lipopolysaccharide-induced liver injury in mice. Five previously undescribed oligomeric secoiridoid glycosides, jasminumosides A-E (1-5), were isolated from the extract, along with 19 known compounds (6-24).

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Introduction: The optimal strategy for very high-power short-duration (vHPSD) ablation for atrial fibrillation (AF) is unclear. Data regarding the application of box isolation (BOXI) and its complications, particularly, pulmonary vein stenosis (PVS), remain scarce. We aimed to determine the optimal strategy for vHPSD in AF ablation by focusing on pulmonary vein isolation (PVI) and BOXI and assessing the acute efficacy and safety.

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Catheter ablation is the first-line treatment for atrial fibrillation. Although the efficacy and safety of this procedure have been reported in older patients, they might diminish with age. Therefore, this study aimed to determine the safety and effectiveness of atrial fibrillation ablation in patients aged ≥80 years.

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Treating vertebral artery-posterior inferior cerebellar artery (VA-PICA) aneurysms poses challenges because of their complex anatomy. Although endovascular treatment is commonly preferred, direct surgery offers better recovery prospects than endovascular surgery aided by bypass techniques. We present a VA-PICA aneurysm case treated with VA internal trapping, using a PICA-to-PICA bypass without direct clipping.

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Introduction: Three-dimensional (3D) maps are useful for premature ventricular contraction (PVC) ablation. However, positional information changes compared with sinus rhythm when PVCs appear, rendering ablation difficult. We aimed to understand the spatial displacement characteristics of PVC ablation in 3D maps and the therapeutic effect after correction using the LAT-Hybrid function.

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Introduction: Suture-mediated vascular closure devices have been widely used in catheter ablation, with 0.14-0.3 % incidence of pseudoaneurysm complications.

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Objectives: The diagnosis of early-onset Alzheimer's disease (EOAD) can cause emotional stress not only to the patients themselves but also to their spouses. This study aimed to evaluate the risk of psychiatric disorders in spouses of EOAD patients, using psychotropic drug initiation as a surrogate indicator.

Methods: A cohort study was conducted using a Japanese claims database, with spouses of EOAD patients (exposed spouses) matched with spouses of non-EOAD individuals (reference spouses) up to a 1:10 ratio.

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Article Synopsis
  • The study investigates the effectiveness of catheter ablation in eliminating idiopathic ventricular arrhythmias from different sites in the heart.
  • It analyzes data from 58 patients and finds that overall, 72% had successful ablation, with different success rates linked to two specific sites: ECS and endo-EAS.
  • Successful ECS ablation is associated with shorter distances to the activation site, while successful endo-EAS ablation is linked to earlier electrical signals and shorter intervals between activation sites.
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Background: The distribution of anti-factor Xa activity (AXA) in patients with nonvalvular atrial fibrillation (NVAF) taking edoxaban 15 mg has not been fully elucidated.

Methods And Results: The trough and peak AXA were measured in 19 NVAF patients taking edoxaban 15 mg. We compared these results with those in patients taking edoxaban 30 mg.

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Background: Common carotid artery occlusion (CCAO) sometimes requires vascular reconstruction. Ipsilateral superficial temporal artery (STA)-middle cerebral artery (MCA) bypass is unsuitable due to insufficient blood flow to the external carotid artery. The bonnet bypass, one treatment option for CCAO, requires a long coronal incision and bone groove to prevent malposition and collapse of an interposition graft.

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Article Synopsis
  • * Researchers used graft copolymer self-assembly to create polymer micelles in various shapes, finding that cylindrical micelles with an aspect ratio of 2.4 are least taken up by macrophages.
  • * Short cylindrical micelles showed a 3.3-fold increase in blood circulation time compared to spherical micelles, highlighting the importance of designing nanoparticles with optimal shapes for better drug delivery.
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The liquid crystal molecule 3-fluoro-4-(3,4,5-trifluorophenyl)phenyl 2,6-difluoro-4-(-5-n-propyl-1,3-dioxane-2-yl)benzoate (DIO) has attracted considerable interest owing to its unique ferroelectric nematic phase and extraordinarily high dielectric constant. To expand the DIO series, novel analogs with 1,3-dioxane units converted to ester units (EST analogs) were synthesized, and their physical properties were characterized. The EST analogs exhibited ferroelectric phases similar to those of the corresponding DIO analogs.

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Unlabelled: Laparoscopic complete mesocolic excision with central vessel ligation has been widely accepted for its oncological benefits in colon cancer surgery. However, laparoscopic right hemicolectomy involves a risk for vascular injury during dissection around the surgical trunk. This technical difficulty has been attributed to the limited movement of conventional laparoscopic forceps.

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Background: Anti-coagulant ileus, characterized by intramural hematoma due to excessive anti-coagulant therapy, presents a diagnostic challenge. Although previously considered uncommon, recently, reporting cases of anti-coagulant ileus have become more frequent. Herein, we report a rare surgical case of anti-coagulant ileus mimicking small-bowel tumors.

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Ultra-high-density mapping was used for potential-guided radiofrequency ablation for typical atrioventricular nodal reentrant tachycardia. The mapping detailed the spread of activation in the Koch's triangle and identified target potentials and tachycardia circuits. This mapping provides additional information to the slow pathway conventionally used for safe and effective ablation.

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Background: One-third of spinal epidural hematomas occur spontaneously, and these may be associated with the acute onset of severe paralysis. Here, we present a case of T4-L4 symptomatic spontaneous spinal epidural hematoma which was successfully removed using a flexible neuroendoscope after hemilaminectomy.

Case Description: Using flexible neuroendoscopy, we successfully treated a T4-L4 spinal epidural hematoma in an 89-year-old Japanese female who spontaneously developed back pain and paraparesis.

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A ruptured bilateral vertebral artery dissecting aneurysm (BVDA) is a challenging vascular disorder. Trapping surgery with bypass assistance could be a potential treatment; however, there is a risk of ischemic complications. Recently, endovascular treatment has been reported, but its long-term outcomes remain uncertain.

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Background: Traumatic pseudoaneurysms are rare but have a high mortality rate; therefore, immediate diagnosis is vital. Most pseudoaneurysms are in the internal carotid artery or peripheral arteries, while proximal middle cerebral artery pseudoaneurysms have rarely been reported. We present a case of ruptured traumatic pseudoaneurysm located at the M1-M2 bifurcation.

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Winter geometrid moths show striking sexual dimorphism by having female-specific flightless morphs. The evolutionary grades of wing reduction in winter geometrid moths vary and range from having short wings, vestigial wings, to being wingless. Although the ontogenetic processes underlying the development of the wingless or short-wing morphs in Lepidoptera has been well studied, the mechanisms underlying the development of vestigial wing morphs in winter geometrid moths during metamorphosis are poorly understood.

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Introduction: The efficacy of catheter ablation in patients with low cardiac function has been previously reported; however, only a few studies have included mid-range ejection fraction (mrEF). This study aimed to evaluate the efficacy and safety of atrial fibrillation (AF) ablation in patients with left ventricular ejection fraction (LVEF) < 50%.

Methods: This study retrospectively analyzed 79 patients (reduced ejection fraction [rEF]/mrEF, 38/41; paroxysmal/persistent, 37/42; heart failure hospitalizations within one year before ablation, 36 [45.

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M1 large circumferential aneurysms are clinically challenging because they cannot be treated by simple neck clipping and they may involve the lenticulostriate arteries (LSAs). Although some reports have described endovascular and direct surgical treatment of these aneurysms, the optimal treatment approach remains uncertain. We report a case involving a ruptured large M1 circumferential aneurysm that was treated with bypass-assisted trapping surgery and showed favorable outcomes.

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A methanol extract of rhizomes of Picrorhiza kurroa Royle ex Benth. (Plantaginaceae) showed hepatoprotective effects against D-galactosamine (D-GalN)/lipopolysaccharide (LPS)-induced liver injury in mice. We had previously isolated 46 compounds, including several types of iridoid glycosides, phenylethanoid glycosides, and aromatics, etc.

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In this study, we report a case of catastrophic propeller brain injury with large scalp defect treated with omental flap reconstruction. A 62-year-old man was accidentally caught in a powered paraglider propeller during maintenance. The rotor blades impacted the left part of his head.

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Carbon monoxide (CO) is a toxic, hazardous gas that has a colorless and odorless nature. On the other hand, CO possesses some physiological roles as a signaling molecule that regulates neurotransmitters in addition to its hazardous effects. Because of the dual nature of CO, there is a need to develop a sensitive, selective, and rapid method for its detection.

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