Publications by authors named "Hidehiko Hara"

Article Synopsis
  • Transcatheter closure of paravalvular leaks (PVL) is a viable treatment for high-risk patients, yet limited research exists on its effectiveness using Amplatzer devices in Japanese patients with mitral PVL.
  • A study involving 12 patients (average age 78) showed successful closure procedures were performed, with a reduction in PVL severity and no major complications reported within 30 days.
  • One year later, an all-cause mortality rate of 16.7% was noted, with 25% of patients needing further intervention due to symptom recurrence, indicating the treatment's potential but also the need for monitoring.
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Optimal medical therapy (OMT) is increasingly recognized as a cornerstone in managing chronic coronary syndrome (CCS), offering a non-invasive alternative to percutaneous coronary intervention (PCI). A 38-year-old male with diabetes, dyslipidemia, and hypertension was treated with early and comprehensive OMT, including statins, ezetimibe, sodium-glucose cotransporter 2 inhibitors (SGLT2i), pioglitazone, and renin-angiotensin system inhibitors. Insulin was introduced during the acute phase to stabilize glycemic control.

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Acute adverse reactions to COVID-19 mRNA vaccines are a major concern, as autopsy reports indicate that deaths most commonly occur on the same day of or one day following vaccination. These acute reactions may be due to cytokine storms triggered by lipid nanoparticles (LNPs) and anaphylaxis induced by polyethene glycol (PEG), both of which are vital constituents of the mRNA-LNP vaccines. Kounis syndrome, in which anaphylaxis triggers acute coronary syndrome (ACS), may also be responsible for these cardiovascular events.

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Background: We investigated whether drug-coated balloon (DCB) treatment is effective for all de novo cases of coronary artery disease (CAD) in patients with diabetes mellitus. Furthermore, we also investigated the relationship between the degree of diabetes mellitus and clinical outcomes after DCB treatment.

Methods: In this study, we included 516 consecutive patients with de novo CAD who were treated with DCB.

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Platypnea-orthodoxia syndrome (POS) is a clinical condition that causes dyspnea and hypoxia in the sitting and standing positions. In this case, a 67-year-old man showed hypoxemia after undergoing the Bentall procedure that worsened in the standing position during rehabilitation. Contrast-enhanced computed tomography of the thorax and abdomen revealed no cause of respiratory failure.

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Atrial septal defects (ASDs) often present with multiple foramina, including a patent foramen ovale (PFO) and atrial septal aneurysms (ASAs). Transcatheter device closure of an ASD may require additional supportive techniques in complex cases. Here, we report a case of a secundum ASD complicated by an ASA and a PFO in a man in his 50s.

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

Methods And Results: PFO Japan PMS is a prospective single-arm non-randomized multicenter clinical study.

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For pre-procedural planning of left atrial appendage (LAA) closure, sizing is crucial. Although transesophageal echocardiography (TEE) is a standard modality, cardiac computed tomography (CT) is also widely used. The virtual TEE (V-TEE) that our group developed enables us to reconstruct images similar to TEE images from CT images.

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Article Synopsis
  • The study examined the impact of pre-procedural frailty on clinical outcomes in older patients receiving transvenous pacemaker (TV-PM) implants, highlighting a growing trend in this demographic.
  • During the follow-up of over 4 years, 19.4% of the participants experienced heart failure admissions, with 38.8% being classified as frail.
  • Frailty syndrome was the only significant predictor of heart failure admissions, indicating the importance of assessing frailty status before TV-PM procedures in elderly patients.
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Article Synopsis
  • Left atrial appendage closure (LAAC) using the Watchman device is found to be more cost-effective than warfarin and direct oral anticoagulants (DOACs) for stroke prevention in Japanese patients with non-valvular atrial fibrillation (NVAF).
  • A lifetime analysis showed LAAC saves approximately JPY 1,878,335 (about $17,600) compared to warfarin and JPY 1,198,096 (around $11,226) compared to DOACs, while also providing more quality-adjusted life years (QALYs).
  • The study indicates that LAAC is not only less expensive but also offers a better quality of life, making it a favorable
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Background: Percutaneous left atrial appendage closure (LAAC) has increased for those who need alternative to long-term anticoagulation with non-valvular atrial fibrillation (NVAF).

Methods And Results: From September 2019, after initiating WATCHMAN (Boston Scientific, Maple Grove, MN, USA) device implantation, we established Transcatheter Modification of Left Atrial Appendage by Obliteration with Device in Patients from the NVAF (TERMINATOR) registry. Utilizing 729 patients' data until January 2022, we analyzed percutaneous LAAC data regarding this real-world multicenter prospective registry.

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Heart failure (HF) is challenging public medical and healthcare systems. This study aimed to develop and validate a novel deep learning-based prognostic model to predict the risk of all-cause mortality for patients with HF. We also compared the performance of the proposed model with those of classical deep learning- and traditional statistical-based models.

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Unlabelled: Percutaneous mitral annuloplasty is widely used for the treatment of functional mitral regurgitation. There are limited imaging options to guide MitraClip procedure (Abbott Vascular, Santa Clara, CA, USA) in patients intolerant to transesophageal echocardiography. We describe a case using a 3-dimensional electro anatomical mapping system to facilitate the successful MitraClip procedure.

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Objectives: The aim of this study is to establish a guidance for device retrieval based on comprehensive bench tests.

Background: Device embolisation remains a major complication in transcatheter closure of atrial septal defect and patent ductus arteriosus. Although percutaneous retrieval is feasible in the majority of cases, surgical retrieval may be required in complicated circumstances.

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Identifying patient prognostic phenotypes facilitates precision medicine. This study aimed to explore phenotypes of patients with heart failure (HF) corresponding to prognostic condition (risk of mortality) and identify the phenotype of new patients by machine learning (ML). A unsupervised ML was applied to explore phenotypes of patients in a derivation dataset (n = 562) based on their medical records.

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Balloon pulmonary angioplasty (BPA) for chronic thromboembolic pulmonary hypertension (CTEPH) or pulmonary disease (CTEPD) is performed worldwide. High mean pulmonary arterial pressure (mPAP) during BPA is associated with aggravation of procedure-related complications. Inhaled nitric oxide (NO) acts as a pulmonary vasodilator in CTEPH patients.

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Recently, balloon pulmonary angioplasty (BPA) for chronic thromboembolic pulmonary hypertension (CTEPH) and chronic thromboembolic pulmonary disease (CTEPD) has become an established procedure with stable results. The number of elderly CTEPH/CTEPD patients has also increased due to the widespread recognition of the disease concept. However, the reports of BPA in the elderly are limited.

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Article Synopsis
  • The MitraClip procedure for mitral valve repair is used in high-risk patients but often results in a sizable iatrogenic atrial septal defect (iASD).
  • Out of 2,722 patients who received the MitraClip, 30 (1%) required additional closure of the iASD shortly after the procedure due to complications like hypoxemia and heart failure.
  • The study found that most patients needing closure experienced significant health issues within 24 hours post-procedure, and while most were treated successfully, one patient unfortunately died before closure could be executed.
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Balloon pulmonary angioplasty (BPA) has improved the survival rate of patients with chronic thromboembolic pulmonary hypertension (CTEPH). The resolution of symptoms is one of the remaining goals of BPA. Frailty affects the outcome of cardiovascular diseases or treatments.

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