Hiroshi Yamagami

ORCID: 0000-0002-4224-8130
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Cerebrovascular and Carotid Artery Diseases
  • Acute Ischemic Stroke Management
  • Emergency and Acute Care Studies
  • Cardiac Imaging and Diagnostics
  • Cardiovascular Health and Disease Prevention
  • Trauma and Emergency Care Studies
  • Cardiovascular Function and Risk Factors
  • Cardiac Arrest and Resuscitation
  • Neurological Complications and Syndromes
  • Cardiovascular and Diving-Related Complications
  • Pleural and Pulmonary Diseases
  • Atrial Fibrillation Management and Outcomes
  • Neurosurgical Procedures and Complications
  • Peripheral Artery Disease Management
  • Airway Management and Intubation Techniques
  • Atherosclerosis and Cardiovascular Diseases
  • Traumatic Brain Injury and Neurovascular Disturbances
  • COVID-19 and healthcare impacts
  • Respiratory Support and Mechanisms
  • Pneumothorax, Barotrauma, Emphysema
  • Intracranial Aneurysms: Treatment and Complications
  • Tracheal and airway disorders
  • Medical Imaging and Pathology Studies
  • Coronary Artery Anomalies
  • Sharing Economy and Platforms

Osaka National Hospital
2021-2025

Shonan Kamakura General Hospital
2009-2025

University of Tsukuba Hospital
2024

National Cerebral and Cardiovascular Center
2014-2017

San-ikukai Hospital
2009

Kobe City Medical Center General Hospital
2007

Osaka University
1982-2007

Osaka Dental University
1982

In Japan, emergency medical service personnel often have difficulty obtaining hospitals' acceptance of cases owing to congestion in the unit; such are called difficult-to-transport cases. Increased at a regional level may be associated with prognosis out-of-hospital cardiac arrest (OHCA). This study aimed investigate association between proportion and neurological outcomes patients OHCA, using nationwide Utstein database linked ambulance records Japan. this retrospective cohort from 2017...

10.1002/ams2.70050 article EN cc-by-nc Acute Medicine & Surgery 2025-01-01

Introduction: Oral carriage of Streptococcus mutans (the main pathogen dental caries), positive for cnm that encodes the collagen-binding protein Cnm, is associated with development hypertensive intracerebral hemorrhage and increase cerebral microbleeds (CMBs) in our retrospective observational studies. Herein, we prospectively investigated a relationship between Cnm-expressing S. CMBs longitudinal multicenter cohort study. Methods: We initiated multicenter, prospective study (RAMESSES: R...

10.1161/str.56.suppl_1.wp298 article EN Stroke 2025-01-30

OBJECTIVE--Right ventricular regional contractility has been thought to be difficult assess precisely. Cine magnetic resonance imaging with presaturation myocardial tagging was employed quantitate the contraction of right free wall and identify normal performance compared left ventricle. METHODS--Nine volunteers, aged 27-39 years, were examined in a 1.5 Tesla superconductive magnet, short axis four-chamber sections at mid-ventricular level imaged cine sequences. Tags, applied end diastole as...

10.1136/hrt.74.2.186 article EN Heart 1995-08-01

Background and Purpose — In addition to advanced stenosis, earlier stages of carotid atherosclerosis are associated with the risk for stroke. However, significance has not been established specific stroke subtypes. This study examines association Methods The subjects comprised 1059 patients (mean±SD age, 62±11 years) <60% stenosis. With use ultrasound, was evaluated by plaque score, as defined sum all heights in bilateral arteries. On basis neurological signs symptoms, medical history,...

10.1161/01.str.32.8.1780 article EN Stroke 2001-08-01

With the aging society, number of emergency transportations has been growing. Although it is important that a patient be immediately transported to an appropriate hospital for proper management, accurate diagnosis in prehospital setting challenging. However, at present, information mainly communicated by telephone, which potential risk communication errors such as mishearing. Sharing correct and detailed with departments (EDs) should facilitate optimal care resource use. Therefore,...

10.2196/37301 article EN cc-by JMIR Formative Research 2022-06-20

The coronavirus disease (COVID-19) pandemic massively impacted emergency department (ED) visits. unavailability of specific therapies or vaccines has made non-pharmaceutical interventions (NPIs) an alternative strategy for COVID-19. We assessed the impact NPIs (nationwide school closures and state emergency) on ED visits during COVID-19 in Japan.This retrospective study compared trends from 1 January to 25 May, 2020 (during pandemic) with average 2015-2019 (before pandemic). primary...

10.1002/ams2.603 article EN cc-by-nc Acute Medicine & Surgery 2020-01-01

Nasogastric tube syndrome is a rare but life-threatening complication of nasogastric placement due to acute upper airway obstruction caused by bilateral vocal cord paresis.

10.1002/ams2.872 article EN cc-by-nc-nd Acute Medicine & Surgery 2023-01-01

Background: The AmplatzerTM PFO Occluder was approved for marketing in Japan May 2019, and the Amplatzer Post-marketing Surveillance (PFO PMS) study initiated December 2019. This analysis presents 30-day clinical outcomes PMS patients.

10.1253/circj.cj-24-0080 article EN Circulation Journal 2024-08-23

SUMMARY To elucidate the metabolism of free fatty acid in myocardium hypertrophic cardiomyopathy (HCM), SPET was performed with 123I-15-(p-iodophenyl)-3-R,S-methylpentadecanoic (BMIPP), an analogue acid, and 201Tl nine patients HCM eight healthy volunteers who acted as controls. For quantitative analysis apical area, a radial long-axis tomogram reconstructed every 6° after short-axis tomography. The relative regional uptake (RRU, %) each segment obtained by normalizing to maximal value among...

10.1097/00006231-199505000-00004 article EN Nuclear Medicine Communications 1995-05-01

Surfer's myelopathy is a non-traumatic spinal cord injury that was first described in publication 2004. However, most emergency physicians are not familiar with this rare disease.The patient 19-year-old female novice surfer. She had experienced back discomfort without trauma during her surfing lessons. The turned to dysesthesia of both legs. could walk after 1 h and brought our hospital. Physical examination revealed weakness legs, absent deep tendon reflexes, bilaterally positive Babinski...

10.1002/ams2.416 article EN cc-by-nc Acute Medicine & Surgery 2019-04-05

Serum potassium levels are considered as a marker of cerebrovascular emergencies but there is less clarity on the association between initial serum recorded patient's arrival at emergency department with type stroke. This case-control study using data tertiary care hospital in Japan from April 2018 to September 2019. We identified adult patients hemorrhagic stroke including subarachnoid hemorrhage (cases) and those ischemic (controls). Data age, sex, chief complaints, vital signs, blood...

10.1016/j.jstrokecerebrovasdis.2021.105875 article EN cc-by-nc-nd Journal of Stroke and Cerebrovascular Diseases 2021-05-29

We describe the case of a 67-year-old man with shock and hypoxemia. Chest X-ray showed bilateral lung mass shadows left pleural effusion mediastinal shift, suggesting malignancy. Physical examination point-of-care ultrasound findings did not suggest obstructive or cardiac shock, but patient had prolonged refractory to fluid blood transfusion therapy. inserted drain into thoracic cavity, which enabled recover from shock. diagnosed hypovolemic due spontaneous haemothorax caused by primary...

10.1002/rcr2.1082 article EN cc-by Respirology Case Reports 2023-01-02

To identify the normal performance of left ventricular (LV) regional contraction using cine MR imaging with presaturation myocardial tagging.Sixteen volunteers were examined on a 1.5 T system tagging sequences. Tags applied at end-diastole as 2 parallel black lines short-axis and 4-chamber sections, fractional shortenings calculated 7 LV locations.The following results obtained significance: transmural gradient contractility in section; prolonged late-systolic endocardial shortening...

10.1177/02841851960373p268 article EN Acta Radiologica 1996-05-01

In patients with thunderclap headaches, reversible cerebral vasoconstriction syndrome (RCVS) should be considered as a differential diagnosis. However, RCVS diagnosis in the emergency department (ED) remains challenging. This report describes clinical features and factors related to suggests diagnostic strategies for its management.We retrospectively reviewed medical records of eight diagnosed from January 2010 March 2019 (aged 18-69 years, 5 women).The median duration ED visit was 6 days...

10.1002/ams2.559 article EN cc-by-nc Acute Medicine & Surgery 2020-01-01

BACKGROUND Flow diversion has emerged as a promising treatment strategy for intracranial aneurysms, yet the influence of antiplatelet therapy on outcomes remains uncertain. Regional and institutional variability in regimens further complicates standardization. This survey aimed to investigate common practices medication usage flow aneurysms worldwide. METHODS An anonymous online explored diverter implantations, including agent selection, dosing, duration. The was distributed through...

10.1161/svin.124.001464 article EN cc-by-nc-nd Stroke Vascular and Interventional Neurology 2024-09-06

症例は25歳男性である.小児期からくりかえす鼻出血の既往があった.臥位で読書中に突然の頭痛と共に視野欠損を自覚し,救急受診した.左上同名性四分盲があり,MRI拡散強調画像で右後頭葉内側に高信号領域をみとめ脳梗塞の診断で入院となった.経食道心エコーで右左シャントが確認され,胸部造影CTで左下葉の肺動静脈瘻をみとめ,奇異性脳塞栓症と診断し,肺動脈コイル塞栓術を施行した.既往歴・家族歴から遺伝性出血性毛細血管拡張症(HHT)にともなう肺動静脈瘻と診断した.本邦ではHHTの頻度が欧米にくらべて低いと考えられているが,脳梗塞の原因疾患として肺動静脈瘻が発見されたばあいには,HHTを念頭に病歴・家族歴聴取をおこなう必要がある.

10.5692/clinicalneurol.52.161 article JA Rinsho Shinkeigaku 2012-01-01

BACKGROUND Severe hypothermia has a high mortality rate and necessitates aggressive warming to save lives. One of the most effective treatments for severe is intravascular rewarming. Intravascular recuperative can be delivered by inserting catheter through cervical or femoral veins. Catheter insertion vein commonly performed procedure with fewer complications than internal jugular vein. This conducted central venous When inserted vein, frontal abdominal radiograph often used confirm position...

10.12659/ajcr.936275 article EN American Journal of Case Reports 2022-06-15

Studies have shown that sleep deprivation may reduce empathy among medical students. Yet, little is known about the after a night on call or an overnight shift resident physicians. Hence, we aimed to examine whether reduces physicians' empathy.We conducted multicenter randomized crossover survey using Jefferson Scale of Physician Empathy (JSE). A total 260 physicians who worked at academic hospitals and community in Japan 2016 were recruited into two groups. Group first completed JSE prior...

10.1186/s12909-019-1822-5 article EN cc-by BMC Medical Education 2019-10-26
Coming Soon ...