Publications by authors named "Tomomatsu T"

Article Synopsis
  • Perioperative FEC therapy is a common treatment for breast cancer, but over 20% of patients experience febrile neutropenia (FN), which pegfilgrastim is often used to prevent.
  • A study on pegfilgrastim's long-term safety found no significant differences in blood cell counts or long-term effects after one year of use.
  • Pegfilgrastim administration significantly reduced the incidence of FN (6.5% with pegfilgrastim vs. 22.8% without), indicating it can be safely used for one year in breast cancer patients undergoing chemotherapy.
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Article Synopsis
  • A study investigated the costs and survival outcomes associated with pegfilgrastim prophylaxis for febrile neutropenia (FN) in breast cancer patients undergoing chemotherapy in Japan.
  • The pegfilgrastim group had higher median total medical costs compared to the non-pegfilgrastim group but did not show a significant difference in FN hospitalization costs.
  • Despite increased costs, there was no significant difference in 3-year overall survival rates between the two groups, suggesting pegfilgrastim should be used selectively based on individual FN risk factors rather than routinely.
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Background: Female sex and younger age are reported risk factors for chemotherapy-induced nausea and vomiting (CINV) in highly emetogenic chemotherapy, but the underlying mechanism has not been elucidated. The purpose of this study was to clarify the impact of menopause on CINV.

Methods: This retrospective observational study analyzed data from consecutive patients who received their first cycle of perioperative anthracycline-based chemotherapy for breast cancer between January 2018 and June 2020.

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Background: Real-time phase mapping (ExTRa™) is useful in determining the strategy of catheter ablation for non-paroxysmal atrial fibrillation (AF). This study aimed to investigate the features of drivers of AF associated with its termination during ablation.

Methods: Thirty-six patients who underwent catheter ablation for non-paroxysmal AF using online real-time phase mapping (ExTRa™) were enrolled.

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Article Synopsis
  • The study examined how coexisting sick sinus syndrome (SSS) affects the success of catheter ablation (CA) in treating atrial fibrillation (AF) through a large-scale registry involving over 5,000 patients.
  • Findings showed no significant differences in AF-free survival rates between patients with SSS and those without, indicating that SSS does not negatively impact the effectiveness of CA.
  • Although 48 patients with SSS needed pacemakers, which correlated with AF recurrence, the majority (85.3%) did not require one within three years post-ablation, suggesting that most patients with SSS can have successful outcomes.
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Hypertension is one of the main side effects of ramucirumab(RAM)plus paclitaxel(PTX)therapy. Although dihydropyridine calcium channel blockers(D-CCBs)are considered to cause drug-drug interactions with PTX based on the inhibition of cytochrome P450, D-CCBs are often administered to patients receiving RAM plus PTX therapy in clinical practice. We retrospectively studied the actual usage of antihypertensive drugs in 133 advanced or recurrent gastric cancer patients who received RAM plus PTX therapy.

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Background: Catheter ablation (CA) is effective for recurrent episodes of ventricular fibrillation (VF) in Brugada syndrome (BrS). VF development in BrS is associated with several electrocardiogram (ECG) abnormalities. This study investigated changes in ECG parameters in high-risk BrS patients who underwent epicardial CA.

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Cardiac resynchronization therapy (CRT) improves functional mitral regurgitation (MR); however, the mechanism and differences in acute and late improvement in MR are unclear. We aimed to evaluate the factors associated with the acute and late MR improvements and the prognosis of MR improvement after CRT. This retrospective study included 121 patients who underwent CRT implantation with full echocardiography assessment at baseline, 1 week, and 6 months after implantation.

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This retrospective study aimed to evaluate the effect of the antiemetic drug olanzapine(OLZ)on blood sugar levels in patients treated with adjuvant or neoadjuvant chemotherapy(AC: doxorubicin plus cyclophosphamide or CEF: cyclophosphamide plus epirubicin plus fluorouracil) for breast cancer. Here, we evaluated the frequency of diabetes(postprandial blood sugar: PBS≥200 mg/dL)and the change in PBS in 149 patients who were prescribed OLZ between September 2016 and August 2017 at our hospital. No diabetic patients were identified during the observation period(median: 3 cycles of chemotherapy).

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Background: Catheter ablation improves physical activity in patients with atrial fibrillation (AF). However, continuous daily evaluation and time course of improvement in physical activity after ablation have not been fully assessed. This prospective study was conducted to evaluate the daily physical activities and changes in the physical performance in patients undergoing catheter ablation for AF by continuous monitoring of a portable accelerometer.

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Objectives: This was a retrospective analysis of a registry of patients who underwent catheter ablation for atrial fibrillation (AF) under uninterrupted direct oral anticoagulant (DOAC) and warfarin administration.

Background: Uninterrupted DOAC used during catheter ablation for AF causes a life-threatening bleeding risk of cardiac tamponade.

Methods: Of 3,149 catheter ablation procedures for AF with uninterrupted oral anticoagulants used in 2,406 patients in 3 institutions, DOAC and warfarin were administered in 1,896 and 1,253 procedures, respectively.

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Article Synopsis
  • The study aimed to assess how prothrombotic responses change after catheter ablation for atrial fibrillation (AF) while patients were on uninterrupted oral anticoagulant (OAC) therapy.
  • A total of 814 patients were involved, with different types of OACs used, and blood samples were analyzed before and three days after the procedure.
  • Results showed a significant increase in D-dimer levels post-ablation, indicating coagulation cascade activation, with variations in prothrombotic markers observed between different OAC groups.
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Background: The mechanisms involved in changes in P wave following catheter ablation for atrial fibrillation (AF) are uncertain. This study aimed to assess the relationship between changes in P-wave morphology and pulmonary vein (PV) reconnection following ablation by the assessment of 12-lead surface electrocardiogram and signal-averaged electrocardiogram.

Methods: This retrospective study included 115 consecutive patients with paroxysmal AF that underwent repeat ablation for recurrence following initial ablation.

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Background: Cardiac resynchronization therapy (CRT) improves the morbidity and mortality rate in patients with left bundle-branch block (LBBB); however, some LBBB patients are non-responders for CRT. Previous studies have shown that a transmural functional line block alters the left ventricular (LV) activation sequence, and that the presence of a line block is predictive for responders. We investigated whether responders could be predicted in patients with LBBB by 2-dimensional (2-D) speckle tracking strain imaging.

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Introduction: Cardiac memory is recognized as altered T-waves when the sinus rhythm resumes after an abnormal myocardial activation period that recovers slowly over several weeks. The T-wave changes after ablation of frequent premature ventricular contractions (PVCs) as cardiac memory was not known.

Objective: This study identified whether cardiac memory exists after successful ablation of PVCs from the right ventricular outflow tract (RVOT).

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Early recurrence of atrial arrhythmia (ERAA) after ablation frequently occurs, but there is limited evidence about ERAA-timing. This study aimed to investigate the association between ERAA-timing and late recurrence. We retrospectively investigated 332 patients who underwent PVI for paroxysmal atrial fibrillation at Nagoya University Hospital and Komaki City Hospital.

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Aims: Left-ventricular (LV) scarring may be associated with a poor response to cardiac resynchronization therapy (CRT). The automatic analysis of myocardial perfusion single-photon emission computed tomography (MP-SPECT) may provide objective quantification of LV scarring. We investigated the impact of LV scarring determined by an automatic analysis of MP-SPECT on short-term LV volume response as well as long-term outcome.

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Atrial fibrillation (AF) shares background comorbidities with coronary artery disease (CAD), including hypertension and diabetes mellitus. The aim of the study is to evaluate the prevalence, risk factors, and prognostic significance of CAD among patients who underwent catheter ablation for AF. In 544 consecutive registered patients who underwent catheter ablation for AF (CHADS2 score 1.

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Background: Anticoagulation therapy with the vitamin K antagonist (VKA) warfarin has been demonstrated to reduce thromboembolic risk after electrical cardioversion (ECV). However, data concerning ECV with non-VKA oral anticoagulants (NOACs) is limited. The objective of this study was to determine the efficacy and safety of NOACs in patients undergoing ECV in a real-world clinical practice at a single center in Japan.

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Purpose: To evaluate the efficacy of the inverted internal limiting membrane (ILM) flap technique in vitrectomy for macular hole (MH) with retinal detachment (RD) compared with vitrectomy using ILM peeling.

Methods: A retrospective case series study was performed. Twenty-two eyes of 22 patients who underwent vitrectomy for MH with RD and followed-up more than 12 months after the surgery were included in this study.

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Although laser photocoagulation is a gold standard for the treatment of retinal ischemic diseases, thermal burn induces the inflammation and the progression of macular edema. To prevent this complication, combination therapy using anti-vascular endothelial growth factor (VEGF) drugs or steroids is clinically utilized, however the mechanisms are still unclear. In this study, we aimed to evaluate the changes in inflammatory and angiogenic cytokine levels in aqueous humor and vitreous body after intravitreal injection of bevacizumab (IVB) or triamcinolone (IVTA), as well as sub-Tenon injection of triamcinolone (STTA) after retinal laser photocoagulation in rabbits.

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We compared early postoperative complications between trabeculectomy and Ex-PRESS implantation. Enrolled patients with 39 primary open-angle or 25 exfoliative glaucoma were randomly assigned to receive trabeculectomy (trabeculectomy group) or Ex-PRESS implantation (Ex-PRESS group). Primary outcomes were early postoperative complications, including postoperative anterior chamber inflammation, frequencies of hyphema, flat anterior chamber, choroidal detachment, hypotonic maculopathy, and the change of visual acuity.

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Purpose: To evaluate the correlation between central retinal thickness (CRT) after vitreous surgery and final visual outcome in eyes with idiopathic macular holes (MH).

Methods: A prospective analysis was performed of patients who had undergone surgical treatment for MH. Best-corrected visual acuity (BCVA) and optical coherence tomography (OCT) parameters including CRT, minimum and base diameters of the MHs were analyzed pre- and postoperatively.

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