Publications by authors named "Kojiro Tanimoto"

Background: The clinical outcome of pulmonary vein isolation (PVI) for persistent atrial fibrillation (AF) is suboptimal. Mapping studies have demonstrated atrial sites outside of the pulmonary veins displaying focal activation patterns during AF. We sought to determine whether adding catheter ablation of focal activation sites to PVI improves clinical outcomes of catheter ablation for persistent AF.

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Importance: A primary objective in managing atrial fibrillation (AF) is to optimize patients' health status, which can be done only if physicians accurately quantify the outcomes associated with AF in patients' lives.

Objective: To explore physicians' estimation of the health status of patients with AF and its association with subsequent care and outcomes.

Design, Setting, And Participants: A multicenter, prospective cohort study was conducted in 2 outpatient practices in Tokyo, Japan.

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Background: Symptomatic gastric hypomotility (SGH) is a rare but major complication of atrial fibrillation (AF) ablation, but data on this are scarce.

Objective: We compared the clinical course of SGH occurring with different energy sources.

Methods: This multicenter study retrospectively collected the characteristics and clinical outcomes of patients with SGH after AF ablation.

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Background: Clinical practice guidelines recommend optimizing the health status of patients with atrial fibrillation (AF) as a primary treatment goal. Whether disease-specific health status is associated with subsequent clinical events is unknown.

Objectives: The aim of this study was to investigate the association between health status and subsequent clinical events among patients with AF.

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Introduction: Data are lacking on the extent to which patients with non-valvular atrial fibrillation (AF) who are aged ≥80 years benefit from ablation treatment. The question pertains especially to patients' postablation quality of life (QoL) and long-term clinical outcomes.

Methods And Analysis: We are initiating a prospective, registry-based, multicentre observational study that will include patients aged ≥80 years with non-valvular AF who choose to undergo treatment by catheter ablation and, for comparison, such patients who do not choose to undergo ablation (either according to their physician's advice or their own preference).

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Background: A recent randomized trial demonstrated that catheter ablation for atrial fibrillation (AF) in patients with heart failure with reduced ejection fraction (EF) is associated with a reduction in death or heart failure. However, the effect of catheter ablation for AF in patients with heart failure with mid-range or preserved EF is unclear.

Methods and results: We screened 899 AF patients (72.

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Background: Early detection of atrial fibrillation (AF) is important. Japan has a universal screening system, and regular health screening (HS) is available to support AF detection without a hospital visit. However, health-related outcomes and other characteristics of HS-detected and conventionally diagnosed AF remain unknown.

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Vinculin and talin-1, which are cytoskeletal proteins affecting focal adhesions, were reported to be down-expressed in atherosclerotic lesions. Recently, we reported high concentrations of plasma talin-1 in patients with coronary artery disease (CAD). However, blood vinculin concentrations in CAD patients have not been clarified.

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Excessive apoptosis is known to be a common feature of atherosclerotic lesions. Fortilin is recognized to have potent antiapoptotic properties. An increased fortilin expression was demonstrated in atherosclerotic lesions, and fortilin knockout mice developed less atherosclerosis.

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Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a hereditary cardiomyopathy that results in fatal arrhythmias and heart failure. Herein, we report a Japanese patient with ARVC whose parents were blood relatives. Genetic testing identified a homozygous rare variant, c.

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Aims: The usefulness of catheter ablation (CA) for atrial fibrillation (AF) across a broad spectrum of heart failure (HF) patients remains to be established. We assessed the association of CA with both health-related quality of life (QoL) and cardiovascular events among HF patients with reduced and preserved left ventricular ejection fraction (LVEF) in an 'all-comer' outpatient-based AF registry.

Methods And Results: Of 3303 patients with AF consecutively enrolled in a retrospective multicentre registry that mandated the Atrial Fibrillation Effect on QualiTy-of-life (AFEQT) questionnaire at registration and 1-year follow-up, we extracted data from 530 patients complicating clinical HF.

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Aims: The efficacy of left atrial posterior wall isolation (PWI) is controversial. Lesion durability may be a major cause of arrhythmia recurrence. The use of the lesion size prediction module improves lesion durability.

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Background: Endosialin, also called tumor endothelial marker-1 or CD248, is a transmembrane glycoprotein that is suggested to play a role in inflammation as well as tumor progression. Endosialin expression was also reported to be upregulated in human atherosclerotic lesions. However, no study has reported blood endosialin levels in patients with coronary artery disease (CAD).

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Background Atrial fibrillation and heart failure (HF) possess mutual risk factors and share a common pathophysiological pathway. Tricuspid regurgitation (TR) is a known predictor of adverse events in patients with HF. However, its implications on patients with atrial fibrillation in its early stage remain unknown.

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Article Synopsis
  • Follistatin-like protein 1 (FSTL1) is linked to inflammation and its levels were studied in 350 patients undergoing coronary angiography to understand its association with coronary artery disease (CAD).
  • The results showed that plasma FSTL1 levels were significantly higher in CAD patients compared to those without CAD, with levels increasing based on the number of blocked vessels.
  • Additionally, FSTL1 levels were determined to be an independent indicator of CAD severity, suggesting it may contribute to the progression of coronary atherosclerosis.
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Article Synopsis
  • * Involving 3,326 patients, the research found that 70.3% remained free from AF after the procedure, and only 4.3% experienced serious complications or death over a 24-month follow-up.
  • * Importantly, those who maintained sinus rhythm had fewer major health issues, with a significant lower rate of complications compared to those whose AF recurred, indicating that keeping sinus rhythm is beneficial for patient outcomes.
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Article Synopsis
  • The study investigated clinical factors associated with atrial fibrillation (AF) recurrence and adverse clinical events (AEs) after AF ablation in a large Japanese population over a median follow-up of 20.7 months.
  • A total of 3,451 patients were analyzed, with 30.3% experiencing AF recurrence and 6.5% facing AEs, including strokes, major bleeding, and deaths.
  • Key findings indicated that different risk factors are linked to each outcome, as female sex and persistent AF were associated with recurrence, while age, comorbidities, and cardiac/renal conditions were linked to AEs.
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Objectives: This study sought to investigate whether symptom under-recognition is associated with the application of catheter ablation.

Background: Atrial fibrillation (AF) symptom burden is frequently under-recognized and may affect the choice of treatment strategies.

Methods: A total of 3,276 patients with AF consecutively registered in a Japanese multicenter database from 2012 to 2017 were analyzed.

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Objectives: This study sought to assess the performance of current diagnostic criteria and identify additional electrophysiological features differentiating orthodromic reciprocating tachycardia (ORT) with a concealed nodoventricular/nodofascicular (NV/NF) pathway from atrioventricular nodal re-entrant tachycardia (AVNRT).

Background: Diagnosing sustained supraventricular tachycardia (SVT) despite the occurrence of ventriculoatrial block (VAB) is challenging.

Methods: We analyzed electrograms of 25 sustained SVTs (9 NV/NF-ORTs [n = 7/2] and 16 AVNRTs) with VAB and 91 AVNRTs without VAB (for reference).

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Whether ablation for atrial fibrillation (AF) is, in terms of clinical outcomes, beneficial for Japanese patients has not been clarified. Drawing data from 2 Japanese AF registries (AF Frontier Ablation Registry and SAKURA AF Registry), we compared the incidence of clinically relevant events (CREs), including stroke/transient ischemic attack (TIA), major bleeding, cardiovascular events, and death, between patients who underwent ablation (n = 3451) and those who did not (n = 2930). We also compared propensity-score matched patients (n = 1414 in each group).

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Direct oral anticoagulants (DOACs) are sometimes prescribed at off-label under-doses for patients who have undergone ablation for atrial fibrillation (AF). This practice may be an attempt to balance the risk of bleeding against that of stroke or AF recurrence.We examined outcomes of 1163 patients who continued use of a DOAC after ablation.

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Background: Rhythm-control strategy, including catheter ablation (CA) application, constitutes an integral part of atrial fibrillation (AF) management. However, elderly patients are underrepresented in clinical trials, and reports on patient-reported outcome of various rhythm-control treatments remain limited. Therefore, we aimed to investigate the application of a rhythm-control strategy for elderly patients with AF.

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