Publications by authors named "Satoshi Higuchi"

Background: A subset of patients with mitral valve prolapse (MVP), a highly heritable condition, experience sudden cardiac arrest (SCA) or sudden cardiac death (SCD). However, the inheritance of phenotypic imaging features of arrhythmic MVP remains unknown.

Methods: We recruited 23 MVP probands, including 9 with SCA/SCD and 14 with frequent/complex ventricular ectopy.

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Marked first-degree atrioventricular block with a PR interval ≥500 ms is rare, leading to unusual P-wave placement. In this case, the P waves immediately after the QRS waves complicated rhythm interpretation. Close attention to P-wave morphology and fused premature ventricular complexes can be important for a proper diagnosis.

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Patients with borderline pulmonary hypertension (PH) often experience shortness of breath or exacerbation of PH during exercise, known as exercise-induced PH. However, the pathogenesis of exercise-induced post-capillary PH (post-EIPH) and its treatment strategies remain unclear. Recent guidelines and consensus documents have highlighted the benefits of sodium-glucose cotransporter-2 (SGLT2) inhibitors in heart failure and chronic kidney disease (CKD).

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Purpose Of Review: Although pulsed field ablation (PFA) has emerged as an innovative nonthermal catheter ablation modality, recent reports raise concerns about its potential impact on nearby coronary arteries. This review provides a comprehensive overview of the current understanding and future directions regarding the effects of PFA on or near coronary arteries.

Recent Findings: Clinical studies have demonstrated the risks of acute transient vasospasm after delivery of PFA, especially with ablation of structures in proximity to the coronary arteries, such as the cavotricuspid and mitral isthmuses.

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Patients hospitalized for heart failure (HF) experience impairments in functional status, primarily affecting basic activities of daily living (ADL). We investigated the independent effect of functional status for ADL on patient-centered outcomes (i.e.

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Background: We have previously shown that dyssynchronous premature atrial complexes (PACs) from the lateral left atrium (LA) lead to greater atrial mechanical dysfunction, remodeling, and sustained atrial fibrillation (AF) than synchronous PACs from the interatrial septum. However, the impact of PAC coupling interval (CI) on atrial remodeling is unclear.

Objectives: This study sought to explore the effect of PAC CI on atrial mechanics and remodeling in the swine model.

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Background: Balloon pulmonary angioplasty (BPA) has exhibited substantial progress in the management of chronic thromboembolic pulmonary hypertension (CTEPH). However, nearly one-half of the patients with CTEPH experience persistent pulmonary hypertension after undergoing BPA, emphasizing the need for enhanced therapies.

Objectives: The authors sought to investigate the clinical significance of functional assessment-guided dilation of the pulmonary artery (PA) in patients with CTEPH undergoing BPA treatment.

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Article Synopsis
  • The study investigates the relationship between interstitial fibrosis and arrhythmic mitral valve prolapse (AMVP) without including cases with severe mitral regurgitation (MR) or mitral annular disjunction (MAD), especially noting the role of female sex in this condition.
  • Researchers used cardiac magnetic resonance (CMR) to measure extracellular volume fraction (ECV%) as a marker for interstitial fibrosis in 65 MVP cases and found that 38% were classified as AMVP.
  • Results showed that AMVP patients had significantly higher global ECV% compared to non-AMVP patients, with this association being particularly strong in females, indicating a possible sex-related risk factor for arrhythmias in those with MVP.
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  • * The study identified a protein called SHARPIN, located on an amplified chromosome in CRC, which is overexpressed in tumor cells and linked to poor patient prognosis due to its influence on lymphatic invasion.
  • * SHARPIN affects the progression of CRC by regulating the proteins MDM2 and p53, leading to changes in cell cycle and apoptosis, thus presenting SHARPIN as a potential new target for therapeutic interventions in colorectal cancer.
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Background: Various surgical procedures have employed microporous polysaccharide hemosphere (MPH) hemostatic agents. However, data regarding their effectiveness in preventing pocket hematomas (PHs) during the implantation of cardiac implantable electronic devices (CIED) among the Asian population are limited. Therefore, this study aimed to investigate the potential benefits of using MPH hemostatic agents during CIED implantations as a preventive measure against post-procedural PHs.

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  • * The study compares a new treatment technique, high-power short-duration pulmonary vein isolation (HPSD-PVI), with traditional methods to see which is more effective in preventing recurrent atrial tachyarrhythmia (ATA).
  • * Analyzing 969 patients, the research found that different factors predicted recurrence for each technique, with the HPSD-PVI group showing a trend towards lower recurrence rates compared to the conventional method.
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  • The study focuses on older patients undergoing transcatheter aortic valve replacement (TAVR) for severe aortic stenosis, emphasizing the need for better risk assessment tools due to multiple comorbidities.
  • Researchers developed a new risk score, the 3C score, based on various cardiac and noncardiac factors to predict two-year all-cause mortality in these patients.
  • Results showed that the 3C score was more effective in predicting mortality compared to established scoring systems like the Charlson Comorbidities Index and EuroSCORE II, highlighting its potential for better risk stratification in older adults undergoing TAVR.
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Purpose To clarify the predominant causative plaque constituent for periprocedural myocardial injury (PMI) following percutaneous coronary intervention: erythrocyte-derived materials, indicated by a high plaque-to-myocardium signal intensity ratio (PMR) at coronary atherosclerosis T1-weighted characterization (CATCH) MRI, or lipids, represented by a high maximum 4-mm lipid core burden index (maxLCBI) at near-infrared spectroscopy intravascular US (NIRS-IVUS). Materials and Methods This retrospective study included consecutive patients who underwent CATCH MRI before elective NIRS-IVUS-guided percutaneous coronary intervention at two facilities. PMI was defined as post-percutaneous coronary intervention troponin T values greater than five times the upper reference limit.

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Remimazolam is a short-acting benzodiazepine sedative with a short half-life and little circulatory depression. The safe use of remimazolam in the anesthetic management of an elderly patient with impaired cardiac function is reported. The patient's hemodynamics remained stable, and the patient was managed without serious complications.

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Background: Vessel injury is a common complication during balloon pulmonary angioplasty (BPA). For persistent hemoptysis, gelatin sponge embolization (GSE) is considered, but its impact on subsequent perfusion in embolized vessels remains unknown. This study explores the feasibility of revascularization in vessels post-GSE.

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Background: Despite the positive impact of implantable cardioverter defibrillators (ICDs) and wearable cardioverter defibrillators (WCDs) on prognosis, their implantation is often withheld especially in Japanese heart failure patients with reduced left ventricular ejection fraction (HFrEF) who have not experienced ventricular tachycardia (VT) or ventricular fibrillation (VF) for uncertain reasons. Recent advancements in heart failure (HF) medications have significantly improved the prognosis for HFrEF. Given this context, a critical reassessment of the treatment and prognosis of ICDs and WCDs is essential, as it has the potential to reshape awareness and treatment strategies for these patients.

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A 26-year-old man with long QT syndrome (LQTS) underwent subcutaneous implantable cardioverter-defibrillator (S-ICD) implantation. The patient exhibited sinus bradycardia relative to his age. The heart rate decreased, and the QT interval became longer with the administration of β-blockers, the first-line therapy for LQTS.

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  • A new MR coronary angiography (MRCA) technique was created using a zigzag fan-shaped centric k-k k-space trajectory and high-resolution deep learning reconstruction (HR-DLR) to improve imaging efficiency and quality.
  • The study involved 12 healthy subjects and 2 patients, comparing different imaging techniques (standard 3D fast gradient echo vs. centric ky-kz k-space trajectory), highlighting that the new technique significantly reduced scan time from 15 minutes to under 5 minutes.
  • Results showed that the new method with HR-DLR produced better image quality than the standard approach without HR-DLR, with a clinical application that yielded good-quality images in patients, including one with a
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  • The study investigates cell-cell interactions in colorectal cancer (CRC) to understand how adenomas progress to sporadic CRC, aiming to improve patient survival rates.
  • By using spatial transcriptomics on early and advanced CRC cases, the researchers identified key interactions between cancer cells and regulatory T cells (Tregs) that may lead to immune suppression in the tumor microenvironment.
  • Findings highlight midkine (MDK) as a critical signaling molecule involved in these interactions and indicate that higher MDK/SDC4 levels are linked to poorer survival outcomes in CRC patients, suggesting a potential target for early diagnosis and treatment.
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Background And Objective: Treatment for atrial fibrillation (AF) has evolved significantly, with pulmonary vein isolation (PVI) becoming an established treatment. However, the outcomes following catheter ablation for persistent AF remain unsatisfactory. Hybrid catheter-surgical ablation has emerged as a therapeutic approach for persistent AF, combining the strengths of both interventions.

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Bromodomain and extraterminal domain (BET) family proteins are epigenetic master regulators of gene expression via recognition of acetylated histones and recruitment of transcription factors and co-activators to chromatin. Hence, BET family proteins have emerged as promising therapeutic targets in cancer. In this study, we examined the functional role of bromodomain containing 3 (BRD3), a BET family protein, in colorectal cancer (CRC).

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  • Nodular regenerative hyperplasia (NRH) is a rare liver disease that appears as small lumps in the liver and is linked to various health problems but can be hard to diagnose correctly.
  • A 49-year-old man found tumors in his liver during a check-up, but he didn't have any symptoms; doctors first thought it was a type of liver cancer.
  • After surgery to remove the tumors, tests showed they were actually non-cancerous lumps that looked like NRH, making it a complicated case for doctors.
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