Publications by authors named "Hideaki Aihara"

The prognosis of anti-glomerular basement membrane (anti-GBM) nephritis, often accompanied by the presence of antineutrophil cytoplasmic antibodies (ANCA), is poor, and even with aggressive therapeutic approaches, kidney replacement therapy (KRT) is typically required. Here, we present a case of necrotizing crescentic glomerulonephritis in a patient double-seropositive for anti-GBM antibodies and ANCA who successfully achieved dialysis independence following aggressive treatment, including avacopan. The patient was a 77-year-old woman with rapidly progressive glomerulonephritis and double seropositivity for myeloperoxidase-ANCA and anti-GBM antibodies.

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Article Synopsis
  • The study investigates the risk of restenosis (re-narrowing of arteries) after endovascular therapy (EVT) for femoropopliteal lesions, which is higher than for aortoiliac lesions.
  • It involved 243 femoropopliteal lesions treated at 18 centers in Japan, assessing lesion characteristics using intravascular ultrasound (IVUS) and follow-up imaging at one year.
  • Findings indicate that factors influencing restenosis and patency vary based on treatment type (stent vs. balloon angioplasty), highlighting the usefulness of IVUS in predicting outcomes after EVT.
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Objectives: This study investigated the correlation between vascular flow reserve (VFR) values and wound healing rate in patients with critical limb ischemia.

Background: Peripheral VFR may be useful for predicting complete wound healing after endovascular therapy (EVT). However, published reports included small numbers of patients from single centers and long-term outcomes remain unknown.

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Aim: Although the Innova self-expanding nitinol stent (Boston Scientific, Marlborough, MA) exhibits acceptable performance in long-term safety and efficacy when used for the treatment of femoropopliteal (FP) lesions, clinical outcomes following its implantation have not been systematically studied in real-world settings. We investigated the one-year clinical outcomes after implantation of Innova self-expanding nitinol stents for the treatment of FP lesions in real-world settings.

Methods: In this multicenter study, 481 lesions in 453 consecutive patients with peripheral artery disease (PAD) (74±9 years; male, 70%; diabetes mellitus, 61%; dialysis, 27%; critical limb ischemia, 37%) who underwent endovascular therapy with the implantation of Innova self-expanding nitinol stents for FP lesions were analyzed from February 2016 to April 2017.

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Background: In patients with myocardial infarction (MI), microvascular obstruction (MVO) determined by cardiac magnetic resonance imaging (CMR) is associated with left ventricular (LV) remodeling and worse prognosis.Methods and Results:In 71 patients with ST-segment elevation MI (STEMI) treated by primary percutaneous coronary intervention (PCI), speckle tracking echocardiography (STE) and CMR were performed early after PCI. All patients underwent CMR at 6 months after hospital discharge to assess the occurrence of LV remodeling.

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Objective: To examine the pressure gradient and peripheral fractional flow reserve (pFFR) measured by a pressure wire as indicators of hemodynamic significance in iliofemoral angiographic intermediate stenosis.

Background: The utility of pressure measurements using a pressure wire with vasodilators is unclear in cases with intermediate iliofemoral stenosis.

Methods: The mean pressure gradient (MPG) and mean pressure ratio (MPR) were measured at baseline and after injection of isosorbide dinitrate in 23 lesions with angiographically intermediate iliofemoral stenosis.

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Article Synopsis
  • The study assessed the effectiveness of myocardial contrast-delayed enhancement (DE) using multidetector computed tomography (MDCT) in identifying microvascular obstruction (MVO) and left ventricular (LV) remodelling after an acute myocardial infarction (AMI).
  • Involving 92 patients, the research highlighted that heterogeneous enhancement (HE) on MDCT could serve as a strong independent predictor for both MVO and LV remodelling, showing significant correlations with these conditions.
  • Findings suggest that MDCT can provide valuable insights immediately after treatment, contributing to better patient management post-AMI.
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Very late stent thrombosis (VLST) is a serious complication after percutaneous coronary intervention. However, the best therapy for VLST with late-acquired incomplete stent apposition and incomplete neointimal coverage remains unknown. In these cases, neointimal coverage was nearly complete and no late-acquired malapposition was detected at 18 months after Endeavor zotarolimus-eluting stent (ZES) implantation for the treatment of VLST with late-acquired incomplete stent apposition after sirolimus-eluting stent implantation.

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Purpose: To compare the vascular response after paclitaxel-coated nitinol drug-eluting stent (Zilver PTX) implantation for superficial femoral artery lesions after 6 and 12 months using optical coherence tomography (OCT).

Methods: Serial OCT examinations were performed in 5 patients (4 men; mean age 78.4 ± 6.

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A 71-year-old man underwent endovascular therapy (EVT) with a paclitaxel-eluting stent in superficial femoral artery (SFA). Optical coherence tomography (OCT) of SFA at 2 months after EVT revealed that several struts were not covered with neointima. Moreover, some mural thrombi were detected within the stent.

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Purpose: To report long-term outcomes of endovascular therapy (EVT) for aortoiliac bifurcation lesions.

Methods: Patients enrolled in the multicenter REtrospective AnaLysis of Aorto-Iliac stenting (REAL-AI) registry in Japan were pooled. Of 2096 patients who underwent EVT for de novo aortoiliac disease between January 2005 and December 2009, 190 patients (148 men; mean age 70±9 years) had aortoiliac bifurcation lesions that were treated with stents, whose configuration (single, V, or kissing) and type (balloon-expandable or self-expanding) were subjected to regression analysis to determine any impact on primary patency along with other demographic, clinical, and lesion characteristics, including Trans-Atlantic Inter-Society Consensus II C/D classification.

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Background: Although endovascular therapy (EVT) has advanced, few reports have compared EVT and bypass surgery in claudication patients with femoropopliteal disease. The present study used data from a multicenter registry in Japan to analyze outcomes of EVT and bypass surgery for claudication patients with Trans-Atlantic Inter-Society Consensus (TASC)-II C and D femoropopliteal lesions.

Methods And Results: Of 1,156 patients who underwent revascularization, 696 patients were treated for intermittent claudication.

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Background: The efficacy of stent-assisted endovascular therapy (EVT) in patients with critical limb ischemia (CLI) compared to bypass surgery (BSX) remains unclear.

Methods And Results: This study was performed as a multicenter retrospective registry. Between January 2004 and December 2009, 460 CLI patients (460 first treated limbs) who underwent BSX (237 patients) or EVT (223 patients) for de novo infrainguinal lesions were identified retrospectively and analyzed.

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Article Synopsis
  • The study aimed to assess how common polyvascular disease (polyVD) is among patients getting percutaneous coronary intervention (PCI) and its impact on health outcomes.
  • Among 1,597 patients, 27.9% were found to have polyVD, and they experienced significantly higher rates of major adverse cardiovascular events (MACE) compared to those with just coronary artery disease (CAD).
  • The risk of MACE rose as the number of affected arteries increased, highlighting the need for careful monitoring and management in patients with polyVD undergoing PCI.
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Objectives: This study evaluated the clinical value of myocardial contrast delayed enhancement (DE) with multidetector computed tomography (MDCT) for predicting clinical outcome after acute myocardial infarction (AMI).

Background: Although some studies have described the use of MDCT for assessment of myocardial viability after AMI, clinical experience remains limited.

Methods: In 102 patients with first AMI, 64-slice MDCT without iodine reinjection was performed immediately following successful percutaneous coronary intervention (PCI).

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Objectives: The aim of this study was to evaluate whether combination therapy of clopidogrel and proton pump inhibitors (PPIs) causes higher numbers of cardiovascular events than clopidogrel alone in Japanese patients.

Background: PPIs are often prescribed in combination with clopidogrel following coronary stenting. PPIs are reported to diminish the effect of clopidogrel because both are metabolized by CYP2C19.

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Background: Oxidative stress caused by contrast medium is thought to be one of the main mechanisms of contrast-induced acute kidney injury. A prospective study was conducted to evaluate the relationship between oxidative stress caused by contrast agent administration and long-term renal function.

Methods And Results: Thirty-six consecutive patients who underwent coronary angiography were enrolled.

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Background: Magnetocardiography (MCG) is sensitive to minute cardiac electric abnormalities, but its clinical utility in diagnosing ischemic heart disease (IHD) has not been established. The present study examined the usefulness of an integral MCG value of ventricular repolarization in patients with IHD.

Methods And Results: MCG was performed at rest in 14 patients with coronary stenosis >75% confirmed by coronary angiography (IHD group) using a 64-channel system, and then the sum of the 64-channel integral values of the QRS or JT intervals (QRSi and JTi, respectively) was calculated.

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Brugada syndrome is an arrhythmogenetic disease characterized by electrocardiographic ST segment elevation in right precordial leads, which is called "coved type", and an increased risk of sudden death as the result of ventricular fibrillation. We presented a case of Brugada syndrome with a convulsive seizure, during administration of a tricyclic antidepressant for the treatment of a depressive state. A 43-year-old man with bipolar II disorder and obsessive-compulsive disorder was admitted to our hospital for the treatment of a depressive state.

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Background: In patients with chronic heart failure, an inadequate increase in muscle blood flow resulting from impaired vasodilation plays a key role in their exercise intolerance. However, no non-invasive methods to assess muscle vasodilation during dynamic exercise were available. We investigated whether the changes in tissue hemoglobin and myoglobin content (total-Hb + Mb) determined by non-invasive measurement using near-infrared spectroscopy (NIRS) reflect vessel conductance of working muscle during exercise.

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