Publications by authors named "Nobuhiro Yamaguchi"

We assess which waters the Clean Water Act protects and how Supreme Court and White House rules change this regulation. We train a deep learning model using aerial imagery and geophysical data to predict 150,000 jurisdictional determinations from the Army Corps of Engineers, each deciding regulation for one water resource. Under a 2006 Supreme Court ruling, the Clean Water Act protects two-thirds of US streams and more than half of wetlands; under a 2020 White House rule, it protects less than half of streams and a fourth of wetlands, implying deregulation of 690,000 stream miles, 35 million wetland acres, and 30% of waters around drinking-water sources.

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Article Synopsis
  • The study investigates the effectiveness of corticosteroids in hospitalized COVID-19 patients with varying severity, particularly those not requiring invasive ventilation.
  • Conducted across 30 hospitals in Japan, the research analyzed 1,092 patients to compare outcomes for those receiving corticosteroids versus those who did not, using adjusted data.
  • Results showed that patients receiving corticosteroids had lower odds of improvement on Day 15, but faster improvement in radiological findings and a shorter duration of invasive mechanical ventilation was noted in the corticosteroid group.
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Cardiac resynchronization therapy (CRT) improves cardiac dyssynchrony in heart failure patients with a wide QRS electrocardiogram (ECG). Assessment of left ventricular (LV) dyssynchrony using echocardiography or other imaging modalities is important to predict CRT effectiveness. In this study, we retrospectively evaluated cardiac nuclear imaging of ECG-gated myocardial perfusion single-photon emission computed tomography (SPECT) with Tc-sestamibi for CRT candidate (n = 120) with severe heart failure and wide QRS (> 120 msec) in ECG.

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We investigated the clinical course of individuals with 2019 novel coronavirus disease (COVID-19) who were transferred from the Diamond Princess cruise ship to 12 local hospitals. The conditions and clinical courses of patients with pneumonia were compared with those of patients without pneumonia. Among 70 patients (median age: 67 years) analyzed, the major symptoms were fever (64.

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Dysphagia, defined as a dysfunction in any stage or process of eating, is common in patients with acute exacerbation of heart failure (HF). In some diseases, dysphagia worsens in-hospital mortality, length of hospital stay, and discharge disposition. However, it remains unclear whether dysphagia is associated with poor short-term outcomes in HF patients.

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Dysphagia, defined as a dysfunction in any stage or process of eating, is common among heart failure (HF) patients. In some diseases state, dysphagia hinders patients from being discharged to home. However, it remains unclear whether dysphagia affects discharge disposition of HF patients.

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A 42-year-old man was referred to our hospital due to chest pain, diabetes mellitus, and sensorineural hearing loss. Transthoracic echocardiography revealed diffuse left ventricular hypokinesis. He was diagnosed with mitochondrial disease and a c.

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Early detection and intervention for dysphagia is important in patients with congestive heart failure (CHF). However, previous studies have focused on how many patients with dysphagia develop CHF. Studies focusing on the comorbidity of dysphagia in patients with CHF are rare.

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Background And Aims: There are some controversial reports that investigated the usefulness of exhaled nitric oxide (eNO) to predict the efficacy of inhaled corticosteroids (ICS) in chronic cough patients. Therefore, we retrospectively analysed the usefulness of eNO measurement with portable analyser to predict the requirement of ICS therapy in persistent cough (defined as lasting for 3 weeks or more) patients in Japan and investigated whether it might improve the management of persistent cough at primary care practice.

Methods: We retrospectively reviewed the clinical records of adult patients who had been referred to our hospital for persistent cough from 1 June 2009 to 30 April 2011.

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For patients with inoperable thymic carcinoma, multidrug chemotherapy containing cisplatin and an anthracycline is often used as first-line chemotherapy. A commonly applied regimen is cisplatin + doxorubicin + vincristine + cyclophosphamide (ADOC). There are relatively few reports on the use of carboplatin and paclitaxel as first-line chemotherapy for thymic carcinoma.

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An 80-year-old woman was referred to our hospital due to a persistent productive cough. Acid-fast staining and a commercial Mycobacterium tuberculosis identification kit with TRC (TRC kit) were positive. However, a false-positive result on the TRC kit was suspected because Mycobacterium tuberculosis was not detected in the sputum culture.

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A 71-year-old man underwent pleural biopsy due to left pleural effusion and pleural thickening in August, 2001. An inflammatory pseudotumor (IPT) was diagnosed, and therefore systemic oral steroid therapy (prednisolone [PSL] 30 mg/day) was initiated. However, after tapering PSL to 7.

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We recently experienced one each of 2 types of recurrent respiratory papillomatosis (RRP). Case 1 (juvenile-onset type): A 30-year-old woman presenting with bloody sputum and large tumors with cavities on her chest Xray film, was referred to our hospital. She had been diagnosed with laryngeal papillomatosis when she was three years old.

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Hospital-acquired pneumonia (HAP) is the second most common cause of hospital-acquired infection and is the leading cause of death. In 2002, the Japanese Respiratory Society (JRS) published guidelines for the diagnosis and treatment of HAP (JRS GL 2002). In these guidelines, treatment with carbapenems is recommended for all disease types of HAP, excluding cases of mild or moderate pneumonia with no risk factors, and cases with early-onset ventilation-acquired pneumonia.

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Common-type atrial flutter (AFL) is a type of atrial tachyarrhythmia with counterclockwise rotation around the tricuspid annulus within the right atrium (RA). It was recently reported that the electrogram voltage reduction observed in the RA was involved in the development of AFL. However, the relationship between the low voltage areas and conduction velocity during AFL has not been fully described.

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Background: Despite similar QRS morphology, idiopathic repetitive monomorphic ventricular tachyarrhythmias (VTs) of left ventricular outflow tract (LVOT) are known to have the variants of different adjacent origins, including the aorto-mitral continuity (AMC), anterior site around the mitral annulus (MA), aortic sinus cusps (ASC), and epicardium. However, the electrocardiographic characteristics of those variants previously have not been evaluated fully.

Methods And Results: Based on the mapping site and successful ablation in 45 consecutive patients with LVOT-VTs, we classified them into VTs of AMC (n = 3), MA (n = 8), ASC (n = 32), and epicardial (n = 2) origins.

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Background: Erythropoietin (Epo) receptors (EpoRs) are expressed in the heart. We have recently demonstrated that the endogenous Epo-EpoR system plays an important protective role in myocardial ischemia in mice and humans. In the present study, we tested our hypothesis that the endogenous Epo-EpoR system in nonhematopoietic cells also plays a protective role against pressure overload-induced cardiac dysfunction in vivo.

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In vitro manipulation of hematopoietic stem cells (HSCs) is a key issue in both transplantation therapy and regenerative medicine, and thus new methods are required to achieve HSC expansion with self-renewal. GATA2 is a transcription factor controlling pool size of HSCs. Of interest, continuous overexpression of GATA2 does not induce HSC proliferation.

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Insulin resistance may enhance the neointima formation via increased oxidative stress. However, clinical trials investigating the benefit of antioxidant therapy with alpha-tocopherol showed negative results. Recent studies showed that chemical characteristics of gamma-tocopherol are distinct from those of alpha-tocopherol.

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A 37-year-old man was admitted to our hospital because of suspicion of the lung cancer in November 2003. Transbronchial tumor biopsy revealed a small number of tumor cells with rhabdoid features, which had eosinophilic cytoplasmic globules. However, a definitive histological diagnosis was not obtained.

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Background: The objective of this study was to evaluate the efficacy and toxicity of carboplatin plus weekly paclitaxel as first-line therapy in patients with advanced non-small cell lung cancer (NSCLC).

Methods: Forty-nine patients were analyzed retrospectively. Every 4 weeks patients received 70 mg/m(2)paclitaxel on days 1, 8, and 15, and AUC 5-6 carboplatin on day 1.

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We studied the clinical features and efficacy of home noninvasive positive pressure ventilation (NPPV) therapy in 80 patients to ascertain its indications and problems. The causes of chronic respiratory failure were restrictive thoracic diseases of post-tuberculosis sequelae (40 cases) and kyphoscoliosis (9 cases), COPD (8 cases), bronchiectasis (7 cases), and interstitial pneumonia (4 cases). One year survival rate of the patients with post-tuberculosis sequelae was 76% and most of the patients who started NPPV at their acute exacerbation died within several months.

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