Publications by authors named "Tomoya Hoshi"

Article Synopsis
  • Women with acute myocardial infarction (AMI) have worse risk profiles and higher in-hospital mortality rates compared to men, but their long-term outcomes post-discharge are less studied.
  • Data from over 29,000 AMI patients showed that women were older and had more comorbidities, resulting in a higher one-year all-cause mortality rate for women compared to men.
  • After accounting for age, the differences in mortality between sexes were reduced, highlighting that age and chronic kidney disease significantly impact post-discharge mortality for both men and women.
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Article Synopsis
  • The study evaluates the outcomes of patients with cancer who underwent transcatheter aortic valve replacement (TAVR) compared to those without cancer, aiming to clarify the clinical efficacy and safety of the procedure for this demographic.
  • A systematic review and meta-analysis of 15 studies (totaling 195,658 patients) revealed that cancer patients had a lower risk of short-term mortality but higher long-term mortality compared to non-cancer patients.
  • Although cancer patients experienced fewer postprocedural complications like stroke and acute kidney injury, they had a higher incidence of needing pacemaker implantation post-TAVR.
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Article Synopsis
  • - The study investigates how high-intensity coronary plaques (HIPs) detected through T1-weighted MRI relate to fractional flow reserve (FFR) measurements in patients with chronic coronary syndrome.
  • - Researchers analyzed data from 281 vessels and found that a higher plaque-to-myocardial signal intensity ratio (PMR) in stenotic lesions correlated with lower FFR values, indicating greater myocardial ischemia risk.
  • - The presence of HIPs was identified as a significant independent predictor of low FFR, underscoring the impact of plaque characteristics on myocardial ischemia severity, even when accounting for other plaque features.
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A 67-year-old woman with severe aortic stenosis (AS) was transferred to our hospital for large B-cell lymphoma treatment. Because of her high risk of anthracycline-induced cardiotoxicity due to severe AS and low performance status, the patient was initially treated with doxorubicin-free chemotherapy. However, doxorubicin was considered necessary to achieve complete remission.

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Unlabelled: A 63-year-old man with a hobby of full marathon and triathlon fainted while commuting on a 25-km one-way bicycle trip and was admitted to the hospital after return of spontaneous circulation. The patient was diagnosed with acute coronary syndrome, and contrast-enhanced computed tomography for trauma diagnosis indicated suspicion of liver injury. Although coronary angiography revealed a severe stenotic lesion in the left anterior descending artery, percutaneous coronary intervention (PCI) was deferred because of thrombolysis in myocardial infarction grade 3 flow.

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Background: Transcatheter aortic valve implantation (TAVI) is an established treatment for patients with severe aortic stenosis (AS). However, the effectiveness of TAVI for patients with cardiogenic shock due to severe bicuspid AS, who require mechanical circulatory support, needs further investigation.

Case Summary: A 64-year-old male patient was admitted to the hospital with congestive heart failure secondary to severe AS and severe left ventricular dysfunction.

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Article Synopsis
  • The study aimed to understand how certain plaque characteristics detected by MDCT and CMR relate to periprocedural myocardial injury (PMI) in patients undergoing elective PCI.
  • It found that patients with PMI had significantly more instances of high-risk plaque (HRP) and high-intensity plaque (HIP) compared to those without PMI, indicating these features can help predict the risk of injury during the procedure.
  • The results suggest that MDCT and CMR are useful tools for identifying high-risk coronary lesions that could lead to PMI after elective PCI procedures.
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Article Synopsis
  • * An 86-year-old man with severe AS and carotid disease experienced cognitive decline; brain imaging revealed significant carotid occlusions and infarction, indicating poor blood flow.
  • * The patient was successfully treated with a staged approach using both carotid angioplasty and transcatheter aortic valve implantation (TAVI), with no complications reported during the procedures.
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Background: Although screening for coronary artery disease (CAD) using computed tomography coronary angiography in patients with stable chest pain has been reported to be beneficial, patients with chronic kidney disease (CKD) might have limited benefit due to complications of contrast agent nephropathy and decreased diagnostic accuracy as a result of coronary artery calcifications. Cardiac magnetic resonance (CMR) has emerged as a novel imaging modality for detecting coronary stenosis and high-risk coronary plaques without contrast media that is not affected by coronary artery calcification. However, the clinical use of this technology has not been robustly evaluated.

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Electrocardiogram (ECG) findings showing ST-segment depression in a wide range of leads and ST-segment elevation in aVR are found in patients with acute coronary syndrome with multivessel coronary lesions and left main trunk lesions. A 64-year-old man with a history of eosinophilic granulomatosis presented with chest pain and dyspnea. Although an ECG showed the above findings, he was diagnosed with acute severe aortic regurgitation (AR) complicating aortic root dissection and successfully underwent urgent Bentall operation.

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Background: Nilotinib, a second-generation BCR-ABL tyrosine kinase inhibitor (TKI), is highly effective in the treatment of patients with chronic myeloid leukemia (CML), despite being more vasculotoxic than older TKIs such as imatinib. Herein, we present a case of nilotinib-associated vasospastic angina confirmed by an acetylcholine spasm provocation test.

Case Presentation: A 62-year-old CML patient treated with 300 mg nilotinib twice daily complained of several episodes of rest angina and was hospitalized at our institution.

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Isolated right ventricular (RV) infarction is extremely rare and its diagnosis may be challenging, because RV infarction most often occurs simultaneously with infarction of the inferior wall of the left ventricle. A 66-year-old man with a history of diabetes mellitus presented with cold sweat and general malaise. Although his symptoms were atypical for myocardial infarction, he was quickly diagnosed with RV infarction and successfully underwent urgent percutaneous coronary intervention.

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Background: Although elevated levels of oxidized low-density lipoprotein (LDL) could play a critical role in vulnerable plaque, there are no studies that have compared coronary high-intensity plaque (HIP) and circulating malondialdehyde-modified (MDA)-LDL levels for the prediction of cardiac events.

Methods and results: A total of 139 patients with coronary artery stenosis (>70%) were examined with non-contrast T1-weighted magnetic resonance imaging (MRI) (HIP: n=64, non-HIP: n=75). Scheduled percutaneous coronary intervention (PCI) for culprit lesions was performed within 48 h after MRI.

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Background: Brain or B-type natriuretic peptide (BNP) is an objective marker to diagnose the presence of heart failure (HF) and assess its severity. However, the determinants of serum BNP level in elderly patients with severe aortic valve stenosis (AS) referred for transcatheter aortic valve implantation (TAVI) have not been well investigated.

Methods: We prospectively studied 106 AS patients who underwent TAVI.

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