Publications by authors named "Yamaguchi O"

Purpose: Nivolumab plus ipilimumab (Nivo-Ipi) combination therapy is an effective first-line treatment for advanced non-small cell lung cancer (NSCLC). However, its effectiveness and feasibility in elderly patients (aged ≥ 75 years) remain unclear. This study aimed to investigate the efficacy and safety of first-line Nivo-Ipi therapy in elderly patients with NSCLC.

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A video demonstration presents the retrieval of a dislodged leadless pacemaker using the double-snare technique. Sharing troubleshooting strategies in such cases is clinically important for managing rare pacemaker complications.

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We report a rare case of concurrent onset of osimertinib-induced heart failure and metronidazole-induced encephalopathy during treatment of a brain abscess. A 78-year-old female with lung adenocarcinoma presented with neurological symptoms and was diagnosed with a brain abscess. During treatment, she developed heart failure and encephalopathy, linked to osimertinib and metronidazole, respectively.

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Background/aim: Imeglimin, a novel oral antidiabetic agent, was approved in 2021 for the treatment of type 2 diabetes mellitus (T2DM). Phase III clinical trials demonstrated its safety and efficacy in managing T2DM. However, its safety profile in patients with heart failure has not been thoroughly evaluated in real-world clinical settings.

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An 82-year-old woman with a history of myocardial infarction presented with worsening effort angina. Coronary angiography (CAG) revealed 75% stenosis in the proximal left anterior descending artery (LAD), with intravascular ultrasound (IVUS) identifying a severe calcified nodule near a previously implanted drug-eluting stent. The lesion was treated with intravascular lithotripsy (IVL) and a drug-coated balloon (DCB), avoiding left main crossover stenting.

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The relationship between post-ablation excessive supraventricular ectopic activity (ESVEA), a new marker for new-onset atrial fibrillation (AF), and late AF recurrence is uncertain. We enrolled 469 patients with AF who underwent initial radiofrequency catheter ablation and 24-h Holter monitoring the day after. Early AF recurrence (n = 57; 12%) and ESVEA (n = 242; 52%) were noted.

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  • * Instead, an MRI was utilized to assess the PDA, revealing it was aneurysmal and classifying it as type D.
  • * The closure was successfully completed using an Amplatzer Vascular Plug II, and the patient was discharged without any complications.
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The accumulation of damaged mitochondria in the heart is associated with heart failure. Mitophagy is an autophagic degradation system that specifically targets damaged mitochondria. We have reported previously that Bcl2-like protein 13 (Bcl2-L-13) mediates mitophagy and mitochondrial fission in mammalian cells.

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  • This study looked at how cardiac uptake of F-FDG PET, a commonly used imaging technique for cancer, relates to cancer cachexia and overall survival in patients with advanced non-small cell lung cancer (NSCLC).
  • Researchers evaluated 43 patients who experienced weight loss before starting treatment and found that low visual scores for cardiac F-FDG uptake correlated with higher tumor activity and a higher risk of cachexia.
  • The findings suggest that lower cardiac F-FDG uptake indicates poorer nutritional status and is a significant predictor of reduced overall survival for patients with advanced NSCLC.
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An Impella device (Abiomed, Inc., Danvers, Massachusetts, United States) is a useful percutaneous left ventricular assist device for patients with cardiogenic shock. However, there are cases in which patients are unable to escape cardiogenic shock and become Impella-dependent.

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Background: Rifampicin is a strong inducer of the hepatic cytochrome P450 (CYP) family and is known to interact with many clinical drugs. However, to our knowledge, no case of worsening heart failure (HF) due to the interaction between rifampicin and HF drugs has been reported.

Case Summary: A 32-year-old female, who had undergone intracardiac repair for an incomplete atrioventricular septal defect with dextrocardia and prosthetic valve replacements for right and left atrioventricular valve regurgitation, presented as an outpatient.

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  • COVID-19 vaccination is encouraged in Japan to lessen the severity and onset of SARS-CoV-2 infections, but the effects on symptoms in real-world scenarios are not well understood.
  • A study in Japan compared symptoms in 636 COVID-19-positive patients, revealing that vaccinated individuals exhibited less fever and milder symptoms compared to those who were unvaccinated.
  • The findings suggest that fever might not be a reliable symptom for vaccinated individuals, while a sore throat and cough were more common, indicating these symptoms could be critical for COVID-19 testing recommendations.
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Severe eating disorders may develop refeeding syndrome, which sometimes resembles severe cardiac dysfunction. A woman in her thirties was admitted to our hospital because of cardiogenic shock. Transthoracic echocardiography showed reduced left ventricular systolic function.

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  • Aromatase inhibitors (AIs) are commonly used for treating hormone receptor-positive postmenopausal breast cancer, but there's concern regarding their potential cardiovascular risks due to estrogen suppression.
  • A study involving 357 breast cancer patients found that nearly 45% had coronary artery calcification (CAC), but the duration of AI treatment did not significantly differ between those with and without CAC.
  • Key risk factors for higher CAC scores included advanced age, lower hemoglobin levels, and higher rates of conditions like hypertension and diabetes, indicating that treatment duration alone isn’t a major concern for CAC severity.
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Venoarterial extracorporeal membrane oxygenation (VA-ECMO) stabilizes hemodynamics in an electrical storm leading to cardiogenic shock. However, adverse effects of VA-ECMO are increased left ventricular (LV) afterload and LV end-diastolic pressure due to retrograde blood return. These adverse effects could be ameliorated by LV unloading with Impella insertion.

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Objectives: This study evaluated the feasibility of a model-based iterative reconstruction technique (MBIR) tuned for the myocardium on myocardial computed tomography late enhancement (CT-LE).

Methods: Twenty-eight patients who underwent myocardial CT-LE and late gadolinium enhancement (LGE) magnetic resonance imaging (MRI) within 1 year were retrospectively enrolled. Myocardial CT-LE was performed using a 320-row CT with low tube voltage (80 kVp).

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Background: There are currently no established non-invasive indices of echocardiography for elevated left atrial pressure (LAP) especially in patients with atrial fibrillation (AF). Remote dielectric sensing (ReDS) is a novel non-invasive electromagnetic energy-based technology that quantifies total lung fluid, enabling the monitoring of volume status in patients with heart failure. The utility of ReDS for estimating LAP in patients with AF remains unknown.

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Background/aim: Granulocyte colony-stimulating factor (G-CSF)-producing neoplasms are relatively rare; however, little is known on the clinical features of G-CSF-producing lung cancer harboring activating epidermal growth factor receptor (EGFR) mutations.

Case Report: A 66-year-old female was definitively diagnosed with G-CSF-producing lung cancer that was positive for EGFR mutations. She repeatedly received epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs), such as osimertinib and afatinib.

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  • Immune-related adverse events (irAEs), particularly immune-related myasthenia gravis (irMG), are critical for managing immune checkpoint inhibitors (ICIs) in cancer treatment, with irMG being potentially life-threatening.
  • Research identified an incidence rate of ICI-induced MG under 1.0%, with notable overlap syndromes occurring in 20-30% of patients; key diagnostic tools include acetylcholine receptor antibodies and elevated creatinine kinase levels.
  • Effective treatment for irMG typically involves high-dose steroids and plasmapheresis/immunoglobulins, with early immunosuppressive therapy essential for improving outcomes and quality of life post-treatment.
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Purpose: To evaluate the feasibility of left atrial strain (LAS) assessment using cardiac computed tomography (CT) in patients with paroxysmal atrial fibrillation (PAF).

Methods: This retrospective single-center study included 98 patients with PAF who underwent cardiac CT and echocardiography before the first catheter ablation. LAS was analyzed using cardiac CT (CT-LAS) and speckle-tracking echocardiography (STE; STE-LAS).

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  • Immune checkpoint inhibitors (ICIs) are standard treatment for advanced non-small cell lung cancer (NSCLC), and this study investigates the impact of upfront radiotherapy for brain metastases (BMs) in patients treated with either ICI alone or ICI plus chemotherapy.
  • An analysis of 591 patients across multiple institutions revealed that those receiving upfront radiotherapy alongside ICI alone had significantly longer overall survival compared to those who did not receive radiotherapy.
  • However, in the group treated with ICI-chemo, the addition of upfront radiotherapy did not show any significant survival benefit, suggesting different responses to treatment strategies.
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Background/aim: Spontaneous regression (SR) of cancer, which indicates the natural disappearance of malignant tumors, is rare. Little is known about the mechanisms underlying SR; however, immunological reactions, infections, injuries, and medications have been presumed. Among previously reported cases of SR, lung cancer cases have been extremely limited.

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