Publications by authors named "Suzuyama H"

Background: Venoarterial-extracorporeal membrane oxygenation (VA-ECMO) is a vital mechanical circulatory support for treating patients with refractory cardiogenic shock (CS). VA-ECMO can improve end-organ perfusion; however, it increases left ventricular (LV) afterload, resulting in further myocardial damage. ECPELLA, a combination of VA-ECMO and Impella (Abiomed Inc.

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  • - The study compares the hemodynamic performance and clinical outcomes of self-expandable valves (SEV) and balloon-expandable valves (BEV) in patients with small aortic annulus (SAA) undergoing transcatheter aortic valve replacement (TAVR).
  • - Results showed that SEV offered better hemodynamics, with a higher rate of severe prosthesis-patient mismatch and a greater mean pressure gradient in patients receiving BEV, while BEV had lower incidences of paravalvular leakage and new permanent pacemaker implantation.
  • - Overall, both valve types had similar device success rates, indicating that SEV is superior in hemodynamic outcomes but BEV has advantages in reducing certain complications. *
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Data concerning the clinical effect of the latest-generation self-expandable transcatheter heart valve (Evolut FX) remain limited. We aimed to assess the in-hospital outcomes of 3 bioprosthetic valves (Evolut EPO, PRO+, and FX). We analyzed data from a Japanese multicenter registry involving 634 consecutive patients who underwent transcatheter aortic valve replacement with Evolut FX up until October 2023.

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  • The Navitor intra-annular self-expanding heart valve (IA-SEV) is a new transcatheter heart valve introduced in Japan in April 2022, aimed at improving patient outcomes compared to the previous Portico valve.
  • A study assessed the patient-prosthesis mismatch (PPM) and other outcomes in 463 Asian patients, finding that 91.7% of patients had no PPM, with a low in-hospital mortality rate of 1.9%.
  • Overall, the IA-SEV demonstrated excellent hemodynamic results and reduced paravalvular leakage, making it particularly beneficial for Asian patients who often have smaller annulus sizes.
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  • The study evaluated the clinical outcomes and performance of the SAPIEN 3 Ultra RESILIA (S3UR) valve compared to the SAPIEN 3 (S3) valve in patients undergoing transcatheter aortic valve replacement (TAVR).
  • Results showed no significant differences in in-hospital complications like death and vascular issues between the two groups, but the S3UR group had a lower incidence of paravalvular leakage and better pressure gradients.
  • The findings suggest that while procedural complications are similar, the S3UR valve performs better, especially in smaller sizes, addressing some limitations of existing balloon-expandable valves.
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Purpose: Mechanical circulatory support (MCS) using a venoarterial extracorporeal membrane oxygenation (VA-ECMO) device or a catheter-type heart pump (Impella) is critical for the rescue of patients with severe cardiogenic shock. However, these MCS devices require large-bore cannula access (14-Fr and larger) at the femoral artery or vein, which often requires surgical decannulation.

Methods: In this retrospective study, we evaluated post-closure method using a percutaneous suture-mediated vascular closure system, Perclose ProGlide/ProStyle (Abbott Vascular, Lake Bluff, IL, Perclose), as an alternative procedure for MCS decannulation.

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  • The NAPT trial aims to evaluate whether non-antithrombotic therapy is as effective as aspirin alone for patients who have undergone TAVI, especially since the best post-procedure antithrombotic treatment is still unclear.
  • Conducted in Japan, the trial will involve 360 patients and will focus on key outcomes like mortality, heart attacks, strokes, and bleeding events.
  • Findings will help clarify the risks and benefits of non-antithrombotic therapy, potentially improving care for high-risk TAVI patients.
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Background: Coronary cannulation after TAVR is sometimes difficult due to an overlap between native and neo-commissures, especially in Evolut devices with a supra-annular position. The Evolut C-tab corresponds to a neo-commissure, and the hat marker is in a fixed position. Therefore, the orientation of the hat marker can be adjusted to minimise overlaps.

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Low-intensity pulsed ultrasound treatment is known to shorten the healing period of bone fractures by 30%-40%, but the initial mechanism of the healing process remains unknown. One possible mechanism is related to the piezoelectricity of bone. However, the complex geometry of bones results in inherent challenges to evaluating electric fields induced therein.

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Spontaneous coronary artery dissection (SCAD) is diagnosed in a very small percentage of patients with suspected acute coronary syndromes who undergo emergency coronary angiography. Although fibromuscular dysplasia (FMD) is known to coexist in patients with SCAD, the vascular sites of FMD and their frequency have not yet been clarified. We retrospectively reviewed the medical records of 16 patients who were diagnosed with and treated for SCAD at our hospital between 1 January 2011 and 31 January 2023.

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Background: The aim of the study was to identify factors related to the need for hospitalization due to acute alcohol intoxication.

Methods: The data of 42 patients with acute alcohol intoxication who visited our hospital from April 1, 2014 to September 30, 2015 were available for analysis. Factors related to outcome included hospitalization or release to home, Glasgow coma scale (GCS), temperature, pulse rate, blood pressure, oxygen saturation of the peripheral artery (SpO), and respiratory rate.

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  • * The majority of patients (19 out of 22) had slept in their cars overnight, and during the first four days, seven patients were hospitalized for pulmonary thromboembolism, some experiencing severe complications.
  • * The findings suggest that VTE incidence increases after earthquakes, with car overnight stays being a potential risk factor; stable patients can be treated with nonwarfarin oral anticoagulants based on D-dimer levels.
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Background: Vibrio vulnificus is typically present in seawater, fish, and shellfish, and is known to cause severe sepsis, particularly in patients with liver diseases such as cirrhosis. V. vulnificus is one of the most dangerous waterborne pathogens, and infection mainly occurs in western Japan during the summer, with an increased fatality rate.

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  • An ultrasonic measurement technique was used to evaluate wave velocities in racehorse leg bones to diagnose diseases like bucked shin safely and inexpensively in the field.
  • A digital model of the third metacarpal bone was created using high-resolution imaging data and incorporated varying wave velocities specific to the bone's properties.
  • The study identified two wave types: fast-waves, which changed velocity due to bone surface irregularities, and slow-waves, which remained constant, suggesting that comparing these waves could aid in early detection of bucked shin.
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Aim: Extracorporeal cardiopulmonary resuscitation (E-CPR) using veno-arterial extracorporeal membrane oxygenation (VA-ECMO) is a novel lifesaving method for refractory cardiac arrest. Although VA-ECMO preserves end-organ perfusion, it may affect left ventricular (LV) recovery due to increased LV load. An emerging treatment modality, ECPELLA, which combines VA-ECMO and a transcatheter heart pump, Impella, can simultaneously provide circulatory support and LV unloading.

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Transcatheter aortic valve implantation (TAVI) represents the standard of care for relieving aortic stenosis in high-risk patients for surgery. The transfemoral approach is preferable with respect to invasiveness, but is often difficult in patients with complex vascular structures. Recently, the clinical application of advanced visualization and guidance technology with three-dimensional computed tomography (3D-CT) during TAVI has received considerable attention.

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TAVI is an established therapy for patients with severe aortic stenosis. Rapid or control pacing is necessary for TAVI, and most centers are familiar with right ventricular (RV) pacing. Although there are several reports on the efficacy and safety of LV pacing, they are still few.

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Background: When using rapid antigen test kits for the diagnosis of influenza, false-negative results may occur if done too soon after the onset of symptoms. The purpose of this study was done to determine clinical laboratory items other than rapid antigen testing are useful for diagnosing influenza.

Methods: The subjects were 915 patients who visited the outpatient clinic of hospital between April 2010 and March 2017 during the influenza epidemic seasons, from December to April, and had both fever of 37.

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The transcranial Doppler method (TCD) enables the measurement of cerebral blood flow velocity and detection of emboli by applying an ultrasound probe to the temporal bone window, or the orbital or greater occipital foramina. TCD is widely used for evaluation of cerebral vasospasm after subarachnoid hemorrhage, early detection of patients with arterial stenosis, and the assessment of brain death. However, measurements often become difficult in older women.

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Hypertension is an important target for drug discovery. We have focused on the with-no-lysine kinase (WNK)-oxidative stress-responsive 1 (OSR1) and STE20/SPS1-related proline-alanine-rich protein kinase (SPAK)-NaCl cotransporter (NCC) signal cascade as a potential target, and we previously developed a screening system for inhibitors of WNK-OSR1/SPAK-NCC signaling. Herein we used this system to examine the structure-activity relationship (SAR) of salicylanilide derivatives as SPAK kinase inhibitors.

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Background: Determining the treatment strategy for cardiogenic shock following ST-elevation myocardial infarction in a patient with severe aortic stenosis remains challenging and is a matter of debate.

Case Summary: An 84-year-old man with chest pain was transferred to our institute and subsequently diagnosed with ST-elevation myocardial infarction and Killip class III heart failure. The patient was intubated, and urgent coronary angiography revealed severe tandem stenosis from the proximal to mid-left anterior descending coronary artery.

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Transient global amnesia (TGA) is an uncommon disease characterized by sudden onset anterograde amnesia that typically improves within 24 hours. A 35-year-old woman presented with complete disruption of memory that had started on the previous day. She had fever and heart murmur and was diagnosed as having infective endocarditis with Staphylococcus lugdunensis, a coagulase-negative staphylococcus.

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We report here structural development of N-(4-phenoxyphenyl)benzamide derivatives as novel SPAK (STE20/SPS1-related proline/alanine-rich kinase) inhibitors. Abnormal activation of the signal cascade of with-no-lysine kinase (WNK) with OSR1 (oxidative stress-responsive kinase 1)/SPAK and NCC (NaCl cotransporter) results in characteristic salt-sensitive hypertension, and therefore inhibitors of the WNK-OSR1/SPAK-NCC cascade are candidates for antihypertensive drugs. Based on the structure of lead compound 2, we examined the SAR of N-(4-phenoxyphenyl)benzamide derivatives, and developed compound 20l as a potent SPAK inhibitor.

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An 84-year-old female patient suffered from dyspnea due to severe aortic stenosis. Several comorbidities and her advanced age made her acceptable for transcatheter aortic valve implantation (TAVI). The TAVI procedure was performed via a femoral access and a 26-mm CoreValve prosthesis (Medtronic, Minneapolis, MN, USA) was implanted.

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