This study aims to describe the characteristics of hospitalised COVID-19 patients in a tertiary care hospital close to an international airport in Japan and to compare these characteristics among different waves during the pandemic.

Retrospective observational study.

Tertiary care centre in Japan.

All patients diagnosed with COVID-19 who were hospitalised between January 2020 and April 2022 were included.

Clinical characteristics, characteristics of admission, treatments and outcomes were investigated and compared among six pandemic waves.

A total of 827 patients were included. The median age was 58.0 years. More than half of the patients (58.3%) had at least one comorbidity. The majority of patients (89.0%) were domestically infected patients admitted under the Infectious Diseases Law, while the remaining patients (11.0%) were those diagnosed during airport quarantine and admitted under the Quarantine Act. Hospital-acquired COVID-19 infection occurred in 7.0% of cases, and mainly during the sixth wave. Overall, some form of oxygen therapy, high-flow oxygen devices, invasive mechanical ventilation (IMV) and extracorporeal membrane oxygenation was provided in 46.3%, 10.4%, 4.5% and 1.5% of cases, respectively. Only 1.8% of patients were treated in the intensive care unit (ICU), and 59.5% of patients on IMV were managed in the non-ICU ward. The in-hospital mortality rate was 5.8%. Median age, percentages of some comorbidities, vaccination coverage, medications for COVID-19, types of supportive care and ICU admissions differed significantly among waves.

This study suggests that patient characteristics, vaccination coverage, standard of treatment and severity of illness changed across waves during the COVID-19 pandemic. Intensive care delivery in non-ICU wards was unavoidable due to limited ICU capacity, which may be a key consideration when preparing for future pandemics.

Genitourinary syndrome of menopause (GSM) is a prevalent condition among breast cancer survivors, often exacerbated by oncological treatments. Hormonal therapies are typically contraindicated in this population, necessitating effective non-hormonal interventions.

This randomised controlled trial aims to compare the effectiveness and cost-effectiveness of multimodal pelvic floor physiotherapy—comprising pelvic floor muscle training, non-ablative radiofrequency, therapeutic pelvic health education and the use of vaginal moisturisers—versus fractional CO₂ laser therapy combined with vaginal moisturisers in alleviating GSM symptoms in breast cancer survivors. Participants will be randomly assigned to one of the two intervention groups. Primary outcomes include measures of sexual function (assessed by the Female Sexual Function Index), subjective pelvic perineal pain intensity (measured with a 100 mm Visual Analogue Scale) and health-related quality of life (assessed by the Functional Assessment of Cancer Therapy-Breast), assessed at baseline, post-intervention and at 3, 6 and 12 months of follow-up. Statistical analyses will be conducted to evaluate the clinical efficacy and cost-effectiveness of the interventions.

The study protocol has been approved by the Ethics and Health Research Committee of the University of Alcalá (Reference: CEIP/2024/1/012). All participants will provide informed consent prior to inclusion in the study. Findings will be disseminated through peer-reviewed journals and conference presentations, and by engaging with patient associations and survivor groups through tailored materials.

NCT06721936.

To investigate the relationship between a quality of life (QOL) score and clinical parameters in patients with hypertrophic cardiomyopathy (HCM).

A multicentre cross-sectional study.

We analysed data from the Searching for Atrial Fibrillation and Early Recruitment of Heart Failure in HCM registry, collected between 2018 and 2023.

Patients with HCM (n=499) aged ≥18 years from 12 institutions (Shizuoka Prefecture, Japan) were consecutively enrolled.

Clinical parameters, along with data from a short form of the Kansas City Cardiomyopathy Questionnaire (KCCQ-12), were collected. The association between each clinical parameter and the KCCQ-12 score was analysed. Clinical parameters with a significant univariable association (p

In the univariable analysis, KCCQ-12 scores exhibited significant associations with 21 clinical parameters, including sex, left ventricular morphology and the Pittsburgh Sleep Quality Index (PSQI). The multiple regression model with 12 parameters that had a significant univariable association exhibited an adjusted R² of 0.48. In this model, the PSQI (standardised coefficient –0.39; p

In patients with HCM, we investigated the association between the KCCQ-12 score and various clinical parameters. PSQI, as well as known heart failure-related clinical parameters, was significantly associated with the KCCQ-12 score. Visualising the associations of various clinical parameters with the KCCQ-12 score will help physicians to consider factors linked to the decline in QOL in patients with HCM.

This research paper presents a study protocol for an exploratory clinical trial evaluating the safety and potential efficacy of autologous peripheral blood mononuclear cell (PBMNC)-loaded injectable cell scaffold (ICS-001) for angiogenic therapy in chronic limb-threatening ischaemia (CLTI). CLTI, the advanced stage of peripheral artery disease, presents significant therapeutic challenges.

Angiogenic therapy using ICS-001 with PBMNCs—a novel approach designed to enhance local cell retention and promote neovascularisation—will be explored. The study will address the pathophysiology of CLTI, the limitations of current treatments and the rationale for cell-based therapies, alongside the clinical trial design for evaluating the safety and efficacy of ICS-001. We hypothesise that ICS-001 will improve ulcer healing and reduce ischaemic rest pain in patients with CLTI. This paper outlines the methodology, including patient selection, CD34⁺ cell mobilisation, scaffold preparation, injection protocols, clinical assessments, data collection and safety monitoring. The anticipated results, discussion and conclusion will offer insight into the clinical significance and potential impact of ICS-001 as a pioneering angiogenic therapy for CLTI.

The institutional review boards of all participating hospitals approved this study protocol (latest version V.6.0, 5 June 2025). Final data will be made publicly available. A report detailing the study results will be submitted for publication in an appropriate peer-reviewed journal.

Data are available on reasonable request. Technical appendix, statistical code is available by contacting the corresponding author. This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) licence, which permits others to distribute, remix, adapt, build on this work non-commercially, and licence their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

jRCT2052230115, Japan Registry of Clinical Trials.

Accidental hypothermia (AH) can occur in mild-to-severe cases; however, its management is crucial in severe cases as it can cause ventricular fibrillation and lead to death. Among various rewarming therapies for AH, endovascular catheter rewarming has been the focus of recent studies as a minimally invasive alternative to invasive internal rewarming, such as extracorporeal membrane oxygenation (ECMO). However, no study has demonstrated the efficacy and safety of endovascular catheter rewarming therapy. This study aimed to validate the efficacy and safety of endovascular catheter rewarming for patients with AH.

The intensive care with endovascular catheter rewarming in accidental severe hypothermia (ICE-CRASH II) study is a multicentre, randomised study of patients with AH. This study will include patients with AH (age ≥65 years, core temperature

This study was approved by the Hokkaido University Certified Review Board (approval number: 024-00013). Written informed consent will be obtained from all the participants or their legally acceptable representatives. The results will be disseminated through publications and presentations.

Japan Registry of Clinical Trials (jRCT1012240051).

Regular physical exercise has well-known health benefits and is generally considered safe for adults with congenital heart disease (ACHD). However, many individuals with ACHD remain insufficiently physically active. This study explored the barriers and needs related to physical exercise as experienced by people with ACHD to inform the development of tailored strategies that support and promote increased physical activity.

Qualitative study using semistructured interviews conducted between March and May 2023. The interview guide was based on the Fear Avoidance Model, Tampa Scale for Kinesiophobia Heart and European Society of Cardiology guidelines on sports cardiology and exercise for cardiovascular diseases. Interviews were coded and thematically analysed to identify specific physical exercise barriers and needs.

Data saturation was reached after interviewing 19 individuals living with ACHD (median age 46 years (range 24–75), 10 women). Thematic analysis identified four main barriers: (1) physical symptoms and negative past experiences, (2) alienation from peers, (3) perceived decline in physical fitness over time and (4) lack of knowledge about personal physical boundaries. Two needs were identified: (1) personalised, disease-specific exercise information and advice and (2) structured support and guidance from healthcare professionals.

People with ACHD face multiple barriers to engaging in physical exercise. There is a clear need for specific, personalised exercise advice from healthcare providers and the development of long-term programmes and interventions to overcome relevant barriers.