Hiroyuki Nakajima

ORCID: 0000-0003-1194-7091
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About
Contact & Profiles
Research Areas
  • Cardiac Valve Diseases and Treatments
  • Cardiac and Coronary Surgery Techniques
  • Cardiac Structural Anomalies and Repair
  • Aortic Disease and Treatment Approaches
  • Infective Endocarditis Diagnosis and Management
  • Aortic aneurysm repair treatments
  • Mechanical Circulatory Support Devices
  • Intracranial Aneurysms: Treatment and Complications
  • Coronary Interventions and Diagnostics
  • Cardiac, Anesthesia and Surgical Outcomes
  • Congenital Heart Disease Studies
  • Vascular Malformations Diagnosis and Treatment
  • Infectious Aortic and Vascular Conditions
  • Cardiac tumors and thrombi
  • Coronary Artery Anomalies
  • Atrial Fibrillation Management and Outcomes
  • Cerebrovascular and Carotid Artery Diseases
  • Pericarditis and Cardiac Tamponade
  • Trauma Management and Diagnosis
  • Cardiac Arrest and Resuscitation
  • Cardiac Imaging and Diagnostics
  • Connective tissue disorders research
  • Lung Cancer Diagnosis and Treatment
  • Cardiovascular Function and Risk Factors
  • Vascular anomalies and interventions

University of Yamanashi Hospital
2018-2025

University of Yamanashi
2016-2024

Saitama Medical University
2015-2024

Chuo University
2024

National Cerebral and Cardiovascular Center
2003-2023

Saitama International Medical Center
2014-2023

Nissan Chemical Corporation (Japan)
2018-2021

American Association for Thoracic Surgery
2020

Weatherford College
2020

Tohoku University
2016-2019

Background— Previous randomized comparisons of off-pump and on-pump coronary artery bypass grafting (CABG) have yielded controversial results about the cardiac neurological events graft patency. In addition, these studies were composed CABG with a few arterial grafts. We performed prospective controlled study to compare multiple Methods Results— Between July, 2002, September, 2004, 167 consecutive unselected patients referred for elective primary randomly assigned undergo (n=81) or (n=86)....

10.1161/circulationaha.104.524504 article EN Circulation 2005-08-30

The long-term outcome of pediatric coronary artery bypass for patients with severe inflammatory sequelae secondary to Kawasaki disease is unknown.One hundred fourteen children and adolescents ranging in age from 1 19 (median, 10) years at operation were followed up as long 25 a median years. number distal anastomoses was 1.7+/-0.8 per patient, the internal thoracic used all but 3, most frequently left anterior descending lesions. Saphenous vein grafts 24 patients, mostly non-left Patients...

10.1161/circulationaha.108.840603 article EN Circulation 2009-06-23

Abstract OBJECTIVES We evaluated the operative and long-term outcomes of frozen elephant trunk (FET) technique for acute type A aortic dissection. METHODS This study 426 consecutive patients who underwent repair dissection from June 2007 to December 2018 at our centre. Of these, 139 total arch replacement with FET (FET group), 287 other procedures (no group). Ninety-two in group were matched 92 no by using propensity score matching analysis. RESULTS Thirty-day mortality neurological...

10.1093/ejcts/ezaa099 article EN European Journal of Cardio-Thoracic Surgery 2020-02-27

Physiological reaction to competitive flow is considered as the primary mechanism of arterial graft occlusion. Reopening lumen had been also reported, but details remain unknown. We sought delineate effect management moderately stenotic targets on occurrence and clinical results.Clinical records angiograms 3263 bypass grafts in 852 patients, who underwent off-pump coronary revascularization using internal thoracic artery (ITA) radial without aortic manipulation since 2000, were examined....

10.1016/j.ejcts.2010.11.057 article EN European Journal of Cardio-Thoracic Surgery 2011-01-13

Abstract The use of thoracic endovascular aortic repair (TEVAR) for aneurysm (TAA) and Stanford type B dissection (TBAD) has been increasing; however, in terms etiology, the differences long term after TEVAR outcomes remain unexplored. Thus, we investigated etiology-specific long-term results TAA TBAD. A total 421 procedures were performed at our institution from July 2007 to December 2021; 249 cases 172 TBAD included. Traumatic injury excluded. mean observation duration was 5.7 years....

10.1007/s00380-024-02392-8 article EN cc-by Heart and Vessels 2024-04-09

Total arterial off-pump coronary artery bypass (OPCAB) grafting with only internal thoracic (ITA) and composite radial (RA) grafts has been applied extensively to avoid cerebral complications late vein graft failure. We evaluated the initial experience this method by clinical angiographic study.Between April 2000 May 2002, 257 patients underwent OPCAB technique. The range of ages at operation was 42 86 years (mean, 66.1 +/- 8.6 years). On average, 3.28 0.86 per patient were completed. More...

10.1532/hsf.969 article EN The Heart Surgery Forum 2005-02-02

We sought to delineate the effects of severity target lesions and their combinations on occurrence competitive flow, especially in composite Y-graft establish an optimal strategy for graft arrangement patient selection.We reviewed early late angiograms 2514 bypass grafts 601 patients, who underwent off-pump coronary revascularization three-vessel vascular regions using internal thoracic artery (ITA) radial (RA) without aortic manipulation. As a standard technique, left anterior descending...

10.1093/ejcts/ezr057 article EN European Journal of Cardio-Thoracic Surgery 2011-12-21

In coronary artery bypass grafting (CABG), insufficient flow can be a cause of occlusion or string sign the internal thoracic (ITA) graft. A patent saphenous vein (SV) graft from ascending aorta reduce blood through ITA graft, and may affect its long-term patency. present study, we examined impact SV to left on patency anterior descending (LAD) bypass.We reviewed angiograms 313 patients who had two bypasses including 1 in situ LAD between March 1986 December 2006. Patients either grafts...

10.1016/j.ejcts.2008.07.011 article EN European Journal of Cardio-Thoracic Surgery 2008-08-24

The oxidative, reductive, and hydrolytic metabolism of methiocarb the carbaryl by liver microsomes plasma rats or humans were examined. effects on their nuclear receptor activities also When was incubated with rat in presence NADPH, sulfoxide, a novel metabolite, sulfone detected. Methiocarb sulfoxide oxidized to reduced back cytosol. Thus, interconversion between found be new metabolic pathway for microsomes. product hydrolysis, which is methylthio-3,5-xylenol (MX), form oxidations...

10.2131/jts.41.677 article EN The Journal of Toxicological Sciences 2016-01-01

Although muscle strain injury models are frequently employed, highly invasive procedures, including surgical intervention, typically used to produce these models. In this study, a minimally model of acute was produced with single eccentric contraction.The authors tested whether the severity in vivo gastrocnemius depends on excursion ankle.Controlled laboratory study.Animals were randomly assigned 2 groups: small range motion group (90-105 degrees, n = 10) and large (90-125 10). Tetanically...

10.1177/0363546503262199 article EN The American Journal of Sports Medicine 2004-05-25

Total arch replacement (TAR) using an endovascular approach has been initially introduced as the frozen elephant trunk technique (FET). In our institute, TAR FET with Frozenix used first-line treatment for distal aortic aneurysms since 2014. This study aimed to evaluate early and long-term outcomes demonstrate efficacy of this procedure.Between 2014 2021, 121 consecutive patients were treated aneurysms. Early retrospectively analysed.The 30-day mortality rate was 2.5% (3/121). Of...

10.1093/icvts/ivac038 article EN cc-by Interactive Cardiovascular and Thoracic Surgery 2022-02-02

The aim of this retrospective observational study was to delineate determinants for antegrade flow and entire patency the sequential radial artery graft (RAG) in left circumflex (LCX) right coronary (RCA). Angiograms 432 RAGs, which were sequentially anastomosed LCX RCA, proximally with in-situ internal thoracic as composite I- or Y-graft, studied. mean targets RAG 2.83±0.79. We examined effects characteristics targets, such native stenosis their combinations, on competitive occlusion. Of...

10.1510/icvts.2010.247122 article EN Interactive Cardiovascular and Thoracic Surgery 2010-11-03
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