Hirokazu Miyashita

ORCID: 0000-0003-1562-9437
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About
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Research Areas
  • Cardiac Valve Diseases and Treatments
  • Infective Endocarditis Diagnosis and Management
  • Cardiac Imaging and Diagnostics
  • Vascular Procedures and Complications
  • Coronary Interventions and Diagnostics
  • Cardiovascular Function and Risk Factors
  • Cardiac Arrhythmias and Treatments
  • Atrial Fibrillation Management and Outcomes
  • Aortic Disease and Treatment Approaches
  • Venous Thromboembolism Diagnosis and Management
  • Peripheral Artery Disease Management
  • Diabetes Treatment and Management
  • Acute Myocardial Infarction Research
  • Blood Coagulation and Thrombosis Mechanisms
  • Orthopedic Surgery and Rehabilitation
  • Central Venous Catheters and Hemodialysis
  • Antiplatelet Therapy and Cardiovascular Diseases
  • Cardiac Structural Anomalies and Repair
  • Congenital Heart Disease Studies
  • Cardiac electrophysiology and arrhythmias
  • Cardiac, Anesthesia and Surgical Outcomes
  • Cardiac pacing and defibrillation studies
  • Potassium and Related Disorders
  • Pain Management and Treatment
  • Muscle and Compartmental Disorders

Shonan Kamakura General Hospital
2017-2025

Helsinki University Hospital
2020-2023

University of Helsinki
2023

Brachial artery pseudoaneurysm (BAP) is a complication that can result from trauma, iatrogenic injury, or drug abuse, and have serious consequences for the limb overall health, including hemorrhage, nerve venous edema, loss of function, rupture. This paper describes case BAP developed following first hemostasis procedure required second endovascular therapy (EVT) procedure. The patient in this had an brachial appeared 10 days after coronary angiography. experienced swelling pain left upper...

10.28982/josam.7835 article EN Journal of Surgery and Medicine 2025-01-15

Abstract Objectives The study aims to compare the hemodynamic and clinical outcomes of SAPIEN 3 Ultra (S3‐Ultra) with (S3) system in patients who underwent transfemoral transcatheter aortic valve replacement (TF‐TAVR). Background new balloon‐expandable S3‐Ultra incorporates features reduce paravalvular leakage (PVL). However, data after implantation is very limited. Methods A total 282 consecutive TF‐TAVR S3 were evaluated. primary outcome this was incidence ≥mild PVL implantation. Results...

10.1002/ccd.29281 article EN cc-by-nc Catheterization and Cardiovascular Interventions 2020-09-23

Although a distal radial artery (DRA) approach has recently been used in patients undergoing cardiac catheterization, no studies have so far investigated the safety and feasibility of DRA hemodialysis (HD). We aimed to investigate incidence conventional (CRA) occlusion puncture site complications after HD.

10.25270/jic/21.00386 article EN Deleted Journal 2024-08-01

This study investigated the relationship between timing of ventricular tachycardia or fibrillation (VT VF) and prognosis in patients undergoing primary percutaneous coronary intervention (PCI) for acute myocardial infarction (AMI).It is unknown whether VT/VF occurrence affects with AMI.From January 2004 to December 2014, 1004 AMI underwent PCI. Of these patients, 888 did not have (non-VT/VF group) 116 had sustained during prehospitalization hospitalization. Patients were divided into two...

10.1155/2019/5345178 article EN cc-by Journal of Interventional Cardiology 2019-07-08

To evaluate the short-, long-term clinical and angiographic outcomes after treatment of true bifurcation lesions using a modified jailed balloon technique (MJBT).Percutaneous coronary intervention (PCI) for has high risk adverse events. Side branch (SB) occlusion is one most serious complications. Therefore, novel strategies to avoid SB during main stenting keep its patency are important.Between February 2015 2018, 328 patients with 349 underwent PCI MJBT. True were defined as Medina...

10.1002/ccd.28812 article EN Catheterization and Cardiovascular Interventions 2020-02-25

Background ACURATE neo2 is a transcatheter aortic valve implantation system consisting of self‐expanding bioprosthetic with supra‐annular leaflet position and featuring innovations to facilitate placement accuracy reduce paravalvular regurgitation. Methods Results The goal the Early (Early Registry TAVI Prosthesis) was gather real‐life data on safety efficacy in European population treated . Data were collected from 554 consecutive patients at 12 sites (mean age, 82 years; 66% women; mean...

10.1161/jaha.122.029464 article EN cc-by-nc-nd Journal of the American Heart Association 2023-07-25

Transcatheter aortic valve implantation (TAVI) is an established treatment for severe stenosis (AS), but despite estimates of life expectancy after TAVI being essential in heart team discussion, these data are scarce. Therefore, the current study sought to assess long-term survival and its trends relation chronological age, surgical risk, period.Methods Results: We included 2,414 consecutive patients who underwent symptomatic AS between 2008 2021 at 2 international centers. For analysis, was...

10.1253/circj.cj-23-0593 article EN Circulation Journal 2023-11-27

Membranous septum (MS) length, in conjunction with implantation depth (ID), is known as a determinant of conduction disturbance (CD) after transcatheter aortic valve (TAVI). However, its impact might be dissimilar among types because each has different platform. This study sought to investigate the impacts ID and MS length on new-onset CD between ACURATE neo SAPIEN 3. included patients without previous permanent pacemaker who underwent TAVI 3 divided them into 2 groups based according (deep...

10.1016/j.amjcard.2023.05.025 article EN cc-by The American Journal of Cardiology 2023-07-19

Background/Purpose: Although the impact of predicted prosthesis-patient mismatch (PPMP) on outcomes after surgical aortic valve replacement is well established, studies PPMP in transcatheter (TAVR) are limited. This study investigated effects PPMp haemodynamic and 5-year clinical TAVR. Methods/Materials: We analysed 1733 patients who underwent was defined using two different methods: 1) normal reference values effective orifice area for each type size indexed to body surface (PPMp1; n =...

10.1016/j.carrev.2024.06.011 article EN cc-by-nc-nd Cardiovascular revascularization medicine 2024-06-01

Superior vena cava laceration has been reported as a catastrophic complication that requires immediate surgical intervention during transvenous lead extraction. Hereby, we present 2 cases of pseudoaneurysm formation at the superior after extraction, which were successfully managed without invasive treatment. (Level Difficulty: Advanced.).

10.1016/j.jaccas.2022.03.001 article EN cc-by-nc-nd JACC Case Reports 2022-04-01

There is no report on the reproducibility of ultrasound-navigated MANTA deployment (US-MANTA) technique and little known about predictors for US-MANTA-related vascular complication (VC). This study aimed to assess incidence access-site VC using US-MANTA insights MANTA-related from consecutive cases following large-bore arteriotomy.Consecutive patients who underwent transfemoral transcatheter aortic valve replacement with November 2018 February 2020 were evaluated. was defined as...

10.1177/15266028211059446 article EN Journal of Endovascular Therapy 2021-12-01

ABSTRACT Background Sodium-glucose cotransporter-2 inhibitors (SGLT2i) are widely used in cardiology and effective treating acute coronary syndrome (ACS). Their effects on unstable plaque ACS patients remains unclear. This study aimed to examine the effectiveness of SGLT2i phenotypes based optical coherence tomography (OCT) images prognosis with type 2 diabetes mellitus (T2DM). Methods retrospective included 109 total cohort 29 OCT cohort. Based administration after ACS, was categorized into...

10.1101/2023.07.31.23293462 preprint EN public-domain medRxiv (Cold Spring Harbor Laboratory) 2023-08-05

The optimal percent oversizing (%OS) using the SAPIEN3 Ultra (S3U) weighing incidence of paravalvular regurgitation (PVR) ≥ mild against risk conduction disturbance (CD) is not known. This study sought to define an extent annulus area %OS suitable for transcatheter aortic valve implantation with S3U compared (S3). A total 350 patients were 606 S3. Patients categorized depending on degree %OS. PVR was observed in 8.9% and 21.8% those S3 (p <0.001). demonstrated a sustainably lower than any...

10.1016/j.amjcard.2023.08.104 article EN cc-by The American Journal of Cardiology 2023-09-20

Previous studies have revealed the risk factors for femoral pseudoaneurysms (FPA). Most data on FPA are based coronary and peripheral interventions, with limited focusing atrial fibrillation (AF) ablation. However, patient backgrounds, anticoagulation regimens, vascular access methods differ. In addition, a standard managing after AF ablation remains elusive due to difficult nature of achieving thrombosis in pseudoaneurysms.This single-center, retrospective, observational study included 2805...

10.1002/joa3.12950 article EN cc-by Journal of Arrhythmia 2023-11-08
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