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05). The improvements in muscle strength, muscle cross-sectional area and thickness, pulse wave velocity, exercise capacity, functional mobility and balance, balance confidence, fatigue, physical activity, and quality of life were significantly higher in the NMES group compared to the control group (p  less then  0.05). CONCLUSIONS This study suggests that NMES intervention is safe and effective for patients with PAH. BACKGROUND Loop diuretics are widely used for the management of fluid retention in patients with heart failure (HF). Sarcopenia, defined as decreased skeletal muscle mass, is frequently present in patients with HF and is associated with poor prognosis. The effects of loop diuretics on skeletal muscle in HF patients have not been fully elucidated. Here, we investigated the impact of loop diuretics on the skeletal muscle mass in patients with HF. METHODS We conducted a subanalysis of a cross-sectional study from 10 hospitals evaluating 155 patients with HF (age 67 ± 13 yrs, 69% men). RESULTS We compared the HF patients who were treated with loop diuretics (n = 120) with the patients who were not (n = 35). The thigh and arm circumferences were significantly small in the group treated with loop diuretics compared to those not so treated (39.9 ± 4.8 vs. 43.5 ± 6.9 cm, p  less then  0.001 and 26.7 ± 3.5 vs. 28.9 ± 6.2 cm, p  less then  0.001, respectively). In a univariate analysis, higher age, lower body mass index, lower hemoglobin, and loop diuretic use were significantly associated with smaller thigh circumference. In a multivariable analysis, the use of loop diuretics was independently associated with smaller thigh circumference (β = -0.51, 95% confidence interval -0.98 to -0.046, p = 0.032). CONCLUSION Loop diuretics are associated with decreased thigh and arm circumferences in patients with HF, independent of the severity of HF. Our findings revealed for the first time the adverse effects of loop diuretics on skeletal muscle wasting. These findings will have a significant impact in clinical practice regarding the frequent use of loop diuretics in HF patients. BACKGROUND Heart failure (HF) is a hypercatabolic state that promotes branched-chain amino acid (BCAA) catabolic activity in the heart and skeletal muscle and reduces protein synthesis in the liver. Consequently, plasma free aromatic amino acids (AAAs) are increased. We investigated the prognostic value of the BCAA/AAA ratio (Fischer's ratio, FR) in patients with HF. METHODS We enrolled 157 consecutive patients hospitalized for worsening HF (81 men, 76 women; mean ± SD age 75 ± 14 years). Plasma BCAA levels (i.e. total leucine, isoleucine, valine) and AAA levels (i.e. A1874 concentration total tyrosine, phenylalanine) were measured at a time when the patients were stabilized (at discharge). FR was calculated as the combined plasma BCAA levels divided by the AAA level. Cardiac events were defined as a composite of cardiac death and hospitalization for worsening HF. RESULTS The patients were divided into two groups based on the median FR (high-FR group FR ≥ 3.1, n = 78; low-FR group FR  less then  3.1, n = 79). Compared with the high-FR group, low-FR patients were older, had more prior hospitalizations for HF, lower albumin and cholinesterase levels, and lower geriatric nutritional risk index (GNRI). Altogether, 46 cardiac events occurred during the follow-up period (221 ± 135 days), including 14 cardiac deaths and 32 hospitalizations for worsening HF. In a Kaplan-Meier survival analysis, the low-FR group had more cardiac events than the high-FR group (log-rank, p  less then  0.001). The best cut-off value of FR was determined as 2.9 in the receiver operating characteristic curve for cardiac events. A multivariate Cox proportional hazards regression analysis showed that being in the low-FR group was an independent determinant of cardiac events from parameters of liver function tests and GNRI. CONCLUSIONS FR might be useful for predicting future cardiac events in patients with HF, reflecting nutritional status which cannot be assessed by liver function tests and GNRI. INTRODUCTION A demonstration project in Vietnam provided 11,000 doses of human seasonal influenza vaccine free of charge to healthcare workers (HCWs) in 4 provinces of Vietnam. Through this project, we conducted an acceptability survey to identify the main reasons that individuals chose to be vaccinated or not to inform and improve future immunization activities. METHODS We conducted a descriptive cross-sectional survey from May to August 2017 among HCWs at 13 selected health facilities. We employed logistic regression to determine the association between demographic and professional factors, and the decision to receive seasonal influenza vaccine. We performed post-hoc pairwise comparisons among reasons for and against vaccination using Chi square and Fisher's exact tests (for cell sizes less then 5). RESULTS A total of 1,450 HCWs participated in the survey, with a higher proportion of females than males (74% versus 26%). The median age of the participating HCWs was 35 years (median range 25.8-44.2). Among those surveyed, 700 (48%) HCWs were vaccinated against seasonal influenza during the first half of 2017. Younger HCWs under 30 and 30-39 years old were less likely to get vaccinated against seasonal influenza than HCWs ≥50 years old (OR = 0.5; 95%CI 0.4-0.8 and OR = 0.6; 95%CI 0.4-0.8 respectively). Nurses and other employees were more likely to get seasonal influenza vaccination than physicians (OR = 1.5; 95%CI 1.0-2.4 and OR = 2.0; 95%CI 1.2-3.2 respectively). The most common reason for accepting vaccination was fear of getting influenza (66%) and the most common reason for not getting vaccinated was concern about vaccine side effects (23%). CONCLUSION Acceptability of seasonal influenza vaccines in this setting varied among HCWs by age group and job category. Interventions to increase acceptance of vaccine among HCWs in this setting where influenza vaccine is being introduced free for the first time should include targeted risk communication on vaccine safety and efficacy. Published by Elsevier Ltd.