Masaya Shinohara

ORCID: 0000-0003-2607-1408
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About
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Research Areas
  • Atrial Fibrillation Management and Outcomes
  • Cardiac Arrhythmias and Treatments
  • Cardiac electrophysiology and arrhythmias
  • Cardiac pacing and defibrillation studies
  • Heart Rate Variability and Autonomic Control
  • Venous Thromboembolism Diagnosis and Management
  • Cardiac Structural Anomalies and Repair
  • Viral Infections and Immunology Research
  • Cardiovascular Function and Risk Factors
  • Health Systems, Economic Evaluations, Quality of Life
  • Cardiac tumors and thrombi
  • Cardiovascular Syncope and Autonomic Disorders
  • Cardiac Imaging and Diagnostics
  • Advanced X-ray and CT Imaging
  • EEG and Brain-Computer Interfaces
  • Peripheral Artery Disease Management
  • ECG Monitoring and Analysis
  • Electroconvulsive Therapy Studies
  • Takotsubo Cardiomyopathy and Associated Phenomena
  • Spinal Hematomas and Complications
  • Coronary Interventions and Diagnostics
  • Metabolism and Genetic Disorders
  • Pulmonary Hypertension Research and Treatments
  • Advancements in Photolithography Techniques
  • Methemoglobinemia and Tumor Lysis Syndrome

Toho University
2016-2025

Icahn School of Medicine at Mount Sinai
2025

Mitsui Memorial Hospital
2015

Memorial Hospital of South Bend
2015

Tottori University
1997

ABSTRACT Introduction The docking button of the Aveir leadless pacemaker (LP) is occasionally difficult to access due its inappropriate position in right ventricle (RV). Methods and Results We report a case where LP was successfully retrieved by releasing wedged inferior wall RV using loop wire technique. Conclusion technique may be useful change LP. This helpful retrieve even RV.

10.1111/jce.16556 article EN Journal of Cardiovascular Electrophysiology 2025-01-07

COVID-19 vaccine-related myocarditis has been reported worldwide. We herein report two Japanese cases with suspected myocarditis. A 27-year-old man was admitted chest pain 4 days after the second vaccination. An electrocardiogram (ECG) did not reveal any significant abnormalities. The patient, a 37-year-old man, 9 first His ECG exhibited ST-elevation in multiple leads. In both cases, cardiac magnetic resonance imaging findings were consistent They recovered symptomatic relief within few...

10.2169/internalmedicine.8731-21 article EN Internal Medicine 2021-11-26

Catheter ablation (CA) of atrial fibrillation (AF) triggers, including non-pulmonary vein (PV) foci, contributes to improved procedural outcomes. However, the clinical significance an AF trigger during second CA procedures for nonparoxysmal is unknown.

10.1253/circrep.cr-23-0069 article EN Circulation Reports 2024-02-02

Cryoballoon ablation has been established as an effective method for pulmonary vein isolation and recently investigated its efficacy of substrate modification on the left atrial roof area in patients with persistent fibrillation. We herein report first successful case posterior wall including line using cryoballoons a patient fibrillation, dextrocardia, situs inversus. proved to be safe straightforward approach create lasting lesions along wall, even under challenging anatomical conditions.

10.2169/internalmedicine.3662-24 article EN Internal Medicine 2024-01-01

The safety and efficacy of an oral anticoagulant (OAC) treatment the difference between direct OACs (DOACs) warfarin in nonsevere frail elderly patients with AF are unclear.This was a retrospective observational study 354 over 80 years age frailty who were diagnosed treated OACs. Nonsevere defined as clinical scale score <7. Bleeding thromboembolic events during OAC followed up.Of enrolled, 273 (77.1%) received DOACs 81 (22.9%) warfarin. Of receiving DOACs, there 210 (76.9%) prescribed...

10.1002/joa3.12231 article EN cc-by Journal of Arrhythmia 2019-09-06

Catheter ablation is currently an established treatment for symptomatic paroxysmal atrial fibrillation (AF). We focused on elderly patients with a high prevalence of AF and attempted to identify the clinical factors associated unsuccessful outcomes.Among 735 consecutive who underwent procedures, 108 (14.7%, 66 men) aged ≥ 75 years were included. Of them, 80 had AF, remaining 28 non-paroxysmal AF. All pulmonary vein (PV) isolation occasionally additional ablation. When recurred, redo...

10.1536/ihj.19-226 article EN International Heart Journal 2020-01-16

Clinical experience with landiolol use in patients atrial fibrillation (AF) and a severely depressed left ventricular (LV) function is limited. We compared the efficacy safety of that digoxin as an intravenous drug controlling heart rate (HR) during AF associated very low LV ejection fraction (LVEF).We retrospectively analyzed 53 treated (n = 34) or 19) for tachycardias LVEF ≤ 25. The dose was adjusted between 0.5 10 μg/kg/minute according to patient's condition. response treatment defined...

10.1536/ihj.20-256 article EN International Heart Journal 2020-09-11

Intracardiac defibrillation (IDF) is performed to restore sinus rhythm (SR) during radiofrequency catheter ablation (RFCA) of atrial fibrillation (AF). This study aimed investigate the change in IDF threshold before and after RFCA procedure determine whether was associated with AF substrate recurrence. A total 141 consecutive patients drug-refractory persistent (age 62.5 ± 10.3 years, 84.4% male) were enrolled this study. Before RFCA, we initially an output 1 J. When failed SR, gradually...

10.1536/ihj.20-636 article EN International Heart Journal 2021-01-29

Although oral amiodarone (AMD) has been used for the management of atrial fibrillation (AF), serious complications such as interstitial pneumonia (IP) occur very occasionally.We evaluated which factors were associated with development IP under long-term administration AMD in patients refractory AF.This study included 122 consecutive (65.8 ± 11.4 years, mean body mass index [BMI] 23.2 4.3 kg/m 2 ) who orally received to inhibit AF between January 2004 and December 2013.Administration was...

10.1536/ihj.15-276 article EN International Heart Journal 2016-01-01

Aim: The aim of this study was to examine cancer and bleeding in atrial fibrillation patients administered with dabigatran. Materials & methods: This enrolled 509 consecutive nonvalvular who received mean administration period 14.8 ± 15.7 months. We investigated the prevalence new development cancers. Further, relation between adverse events evaluated. Results: In patients, major occurred 2.6% dyspepsia 8.4%. 16.9% had a history 3.9% developed These 45% (hazard ratio: 6.30; p = 0.003)...

10.2217/fca-2017-0063 article EN Future Cardiology 2017-12-04

Pilsicainide, a pure Na+ channel blocker, is popular antiarrhythmic drug for the management of atrial tachyarrhythmias (AT), in Japan. However, serious drug-induced proarrhythmias (DIPs) may unexpectedly occur. We assessed clinical background AT patients presenting with DIPs caused by pilsicainide.This study retrospectively enrolled 874 consecutive (543 men, 63.6±15.3 years old, and 57.9±16.5 kg body weight), who were orally administered pilsicainide management. evaluated relationship...

10.1016/j.joa.2016.03.004 article EN cc-by-nc-nd Journal of Arrhythmia 2016-05-26

The SelectSecure™ lead system (SSLS), which is composed of a thin lumenless, active-fixation and deflectable catheter, approved for use in Japan. This study aimed to evaluate the long-term clinical outcomes right ventricular (RV) septal pacing with SSLS along system's safety electrical performance. A total 129 patients were divided into following 3 groups: RV group (SSP, n = 21); conventional (Septal, 77); apical (Apical, 31). All lead-related complications parameters during follow-up...

10.1536/ihj.17-526 article EN International Heart Journal 2018-11-04

The predictive value of the cardio-ankle vascular index (CAVI) for estimating efficacy outcome catheter ablation (CA) in atrial fibrillation (AF) patients is unclear. We aimed to examine performance CAVI recurrences arrhythmias after CA.We enrolled a total 193 with AF (paroxysmal 126 and non-paroxysmal 67) who underwent initial CA procedures at our institute, measurements were conducted between January 2016 March 2017. evaluated first procedure as clinical outcome. was assessed divided...

10.1111/pace.14373 article EN Pacing and Clinical Electrophysiology 2021-10-05

Abstract The majority of the cavotricuspid isthmus (CTI) region consists discretely arranged muscle bundles separated by connective tissue. Heterogeneity in anatomic arrangement results differences endocardial and epicardial activation patterns. We present a case recurrent atrial flutter (AFL) despite presence complete CTI block. found epicardial‐endocardial breakthrough (EEB) sites on right high septum. In addition, excitation confirmed mapping was detected as far‐field potentials....

10.1111/pace.14958 article EN Pacing and Clinical Electrophysiology 2024-03-02
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