Publications by authors named "Toru Obayashi"

Article Synopsis
  • - The KUROSIO study examined the use of direct oral anticoagulants (DOACs) as the primary treatment for Japanese patients with acute venous thromboembolism (VTE), involving 993 patients after exclusions.
  • - The study found low rates of recurrent symptomatic VTE (3.2%) and major bleeding (2.2%) during the first year of treatment, suggesting DOACs are generally effective and safe.
  • - Additionally, chemotherapy and anemia were identified as significant risk factors for experiencing recurrent VTE and major bleeding, respectively.
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Background: A large-scale prospective study of the efficacy and safety of warfarin for the treatment of venous thromboembolism (VTE) has not been conducted in Japan. Therefore, we conducted a real-world prospective multicenter observational cohort study (AKAFUJI Study; UMIN000014132) to investigate the efficacy and safety of warfarin for VTE.

Methods and results: Between May 2014 and March 2017, 352 patients (mean [±SD] age 67.

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Background: The efficacy of direct oral anticoagulants (DOACs) compared with warfarin for the treatment of venous thromboembolism (VTE), and the recurrence of VTE after discontinuation of anticoagulation therapy in research are limited.

Methods and results: This retrospective study enrolled 893 patients with acute VTE between 2011 and 2019. The cohort was divided into the transient risk, unprovoked, continued cancer treatment, and cancer remission groups.

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: This study aims to evaluate the efficacy and safety of direct oral anticoagulants (DOACs) after unfractionated heparin (UFH) bolus for the treatment of intermediate-high-risk pulmonary embolism. : On the basis of initial treatment, 81 patients were divided into two groups: DOAC after UFH bolus infusion group (group D; n=32) and conventional therapy group (group C; n=49). The frequency of recurrence of venous thromboembolism (VTE) and bleeding within 6 months were compared.

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Gender differences in patients with acute pulmonary embolism (APE) remain unclear and controversial. We aimed to understand the gender differences in patients with APE treated in the cardiovascular care units. The registry database of 1,428 patients with APE treated at the Tokyo cardiovascular care unit Network institutions from 2010 to 2014 was retrieved for analysis.

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Japan is facing problems associated with "heart failure (HF) pandemics" and bed shortages in core hospitals that can accommodate patients with acute HF. The prognosis is currently unknown for acute HF patients who were transferred from core hospitals to collaborating hospitals during the very early treatment phase and whose treatment strategies are in place.We enrolled 166 acute HF patients who were hospitalized between January 1, 2015, and December 31, 2015, and compared the conditions of transferred patients (n = 53, median duration before transfer = 6 days) and nontransferred patients (n = 113).

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: Although deep vein thrombosis (DVT) followed by pulmonary thromboembolism (PE) is a critical complication during pregnancy, there have been few reports about its intrapartum management. We evaluated intrapartum management by using a temporary inferior vena cava filter (IVCF) in pregnant women with PE/DVT. : Eleven women with PE/DVT during pregnancy between January 2004 and December 2016 were included.

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: To assess the safety and efficacy of edoxaban for the treatment of venous thromboembolism (VTE) secondary to active malignancy. : We enrolled 48 patients with newly diagnosed VTE secondary to active malignancy that was treated with oral edoxaban for 1 year between September 2014 and August 2015. We retrospectively examined the presence or absence of recurrent symptomatic VTE, VTE-related mortality, and bleeding events.

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A 55-year-old man presented with dyspnea, edema, and appetite loss. He had undergone coronary artery bypass grafting 8 years previously. He had jugular venous distention and Kussmaul's sign.

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Aims: Some studies have shown that the type of atrial fibrillation (AF), whether paroxysmal AF (PAF) or persistent or permanent AF (PeAF), affects the incidence of ischaemic stroke. This study sought to determine the relationship between the AF pattern and the severity and brain volume of infarction in an AF population including transient ischaemic attack (TIA) patients.

Methods And Results: This was a retrospective observational study.

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Background: The prognosis of super-elderly patients (age≥85 years) who undergo bradycardia pacemaker (PM) implantation remains unknown.

Methods: We retrospectively enrolled 868 patients (men 49.0%, 76.

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Although several studies have shown the relation between temperature/atmospheric pressure and pulmonary embolism (PE), their results are inconsistent. Furthermore, diurnal temperature range (DTR) and diurnal pressure range (DPR) were not fully evaluated for their associations with hospital admissions for PE. Study subjects comprised cases of 1,148 PE treated at institutions belonging to the Tokyo Cardiovascular Care Unit Network from January 2005 to December 2012.

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Background: Several studies from Western countries have reported associations between cardiac troponin and B-type natriuretic peptide (BNP) levels and acute pulmonary embolism prognosis; however, the number of such reports from Asian countries, including Japan, is limited. Thus, we evaluated the relationship between blood biochemical findings and acute-phase pulmonary embolism prognosis in Japanese patients.

Methods: The subjects included 441 patients with acute pulmonary embolism (191 men, 250 women; average age, 65.

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Background: The Pulmonary Embolism Severity Index (PESI) and simplified PESI (sPESI) have not been fully evaluated in Japan, so the present study aimed to evaluate these risk stratification models in the prediction of mortality of affected patients in Japan.

Methods And Results: We retrospectively analysed 302 PE patients (63.9±17.

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Objective: To elucidate the current status of use of inferior vena cava filters (IVCFs) in cases of pulmonary embolism at institutions belonging to the Tokyo CCU Network.

Methods: We conducted a retrospective investigation of 832 consecutive cases of pulmonary embolism reported on survey forms to the Tokyo CCU Network between 2005 and 2010.

Results: Of 832 cases of pulmonary embolism, IVCFs were used in 338 (40.

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