Search Results (3,404)

Background: Pharmacist-led interventions in Gulf Cooperation Council (GCC) countries have been increasingly studied, yet their overall effectiveness across clinical and healthcare outcomes remains incompletely defined. To address this gap, a systematic review and meta-analysis of randomized controlled trials and quasi-experimental studies published between 2000 and 2025 was conducted, following PRISMA 2020 and Cochrane standards. Methods: Searches of PubMed/MEDLINE, Scopus, Web of Science, and CENTRAL identified 437 records, of which 20 studies met the inclusion criteria; 13 contributed meta-analyzable data as randomized controlled trials and seven as quasi-experimental studies. Results: Pooled random-effects estimates favored pharmacist-led care for HbA1c, fasting glucose, low-density lipoprotein cholesterol, diastolic blood pressure, and medication knowledge, although these estimates carried substantial, largely unexplained heterogeneity and were rated as low to very low certainty under GRADE. The effects on systolic blood pressure, total cholesterol, triglycerides, high-density lipoprotein cholesterol, unplanned healthcare use, and antimicrobial utilization were favorable but not statistically significant. Quasi-experimental studies consistently demonstrated reductions in mortality and readmissions, though hospital and ICU length of stay remained variable. Risk of bias was judged as some concerns for randomized trials and moderate to serious for quasi-experimental studies, with substantial heterogeneity observed across blood pressure and lipid outcomes. Conclusions: Overall, pharmacist-led interventions in GCC settings were associated with improvements in glycemic control and LDL cholesterol, with additional benefits in mortality and readmissions, although the certainty of evidence was low to very low, owing to substantial heterogeneity and the predominance of non-randomized designs for the inpatient outcomes. These findings underscore the need for standardized intervention models and outcome measures. Full article

Background: Polycystic ovary syndrome (PCOS) is a prevalent endocrine disorder that elevates the risk of cardiometabolic conditions, including metabolic syndrome (MetS). Aortic knob width (AKW) is a simple radiographic marker reflecting cumulative vascular remodeling and subclinical atherosclerosis. AKW has been associated with cardiometabolic disorders in various populations. However, its clinical relevance in women with PCOS remains unclear. This study aimed to evaluate AKW in women with PCOS and investigate its relationship with MetS. Methods: This retrospective case–control study comprised 200 women diagnosed with PCOS in accordance with the Rotterdam criteria, alongside 200 healthy controls matched for age and body mass index. Clinical, anthropometric, biochemical, and hormonal parameters were recorded. AKW was measured on posteroanterior chest radiographs by two independent observers. MetS was defined based on the 2009 international consensus criteria. Associations between AKW and MetS components were assessed using correlation and covariance analyses. Receiver operating characteristic (ROC) curve analysis was performed to evaluate the diagnostic performance of AKW in detecting MetS. Results: The AKW was significantly higher in the PCOS group than in the control group (30.43 ± 5.02 mm vs. 28.47 ± 5.21 mm, p < 0.001). The prevalence of MetS was markedly higher in women with PCOS (39%) than in the control group (9.5%). AKW increased progressively with the number of MetS components, with a more pronounced trend in the PCOS group. Significant correlations were observed between AKW and all MetS components, including blood pressure, waist circumference, fasting glucose, and triglycerides (all p < 0.001), while high-density lipoprotein cholesterol showed an inverse correlation. ROC analysis demonstrated moderate-to-good discriminatory performance of AKW for identifying MetS in women with PCOS (area under the curve: 0.80; 95% confidence interval: 0.72–0.86; p < 0.001), with an optimal cutoff value of 33.05 mm (78% sensitivity and 80% specificity). Conclusions: AKW was significantly associated with the presence and burden of metabolic syndrome among women with PCOS. Although AKW demonstrated moderate-to-good discriminatory performance for identifying MetS, prospective multicenter studies with external validation are required before its potential clinical utility can be established. Full article

Falls among older adults are a major public health concern due to their association with functional decline and increased healthcare utilization. This study investigated factors associated with fall occurrence by comparing older adults enrolled in a community-based physical activity program with sedentary older adults. This observational cross-sectional study included 67 older adults: 35 participants enrolled in the Niterói 60 Up program (G60UP; 68 ± 4 years) and 32 sedentary older adults in a sedentary comparison group (SCG; 70 ± 7 years). Assessments included anthropometric measurements, medication use, Timed Up and Go (TUG), Tinetti Performance-Oriented Mobility Assessment, Mini-Mental State Examination (MMSE), Pittsburgh Sleep Quality Index (PSQI), and orthostatic testing. Compared with the SCG, G60UP participants reported fewer falls during the previous year (0.26 ± 0.51 vs. 0.78 ± 0.83; p = 0.005), higher Tinetti scores (24.51 ± 2.54 vs. 18.28 ± 5.94; p < 0.001), shorter TUG times (8.66 ± 1.63 vs. 13.00 ± 4.31; p < 0.001), higher MMSE scores, better sleep quality (lower PSQI scores), and lower blood pressure and abdominal adiposity indicators. In the total sample, fall occurrence was associated with lower Tinetti scores (ρ = −0.416; p < 0.001), longer TUG times (ρ = 0.321; p = 0.008), older age (ρ = 0.328; p = 0.007), higher Conicity Index (ρ = 0.281; p = 0.021), and poorer sleep quality (ρ = 0.243; p = 0.047). No variable remained independently associated with falls in the exploratory multivariable logistic regression model. Participants enrolled in the 60 Up program presented more favorable functional, cognitive, sleep-related, and health-related profiles than those in the SCG. Due to the cross-sectional design, these findings should be interpreted as associations rather than causal relationships. Full article

Background: We evaluated the relationship between ambulatory blood pressure monitoring (ABPM) indices and prolonged hospitalization at delivery in pregnant women referred for ABPM assessment. Methods: This was a prospective observational study including 132 pregnant women, followed until delivery. Office and 24 h ABPM measurements were obtained early in pregnancy and mean arterial pressure (MAP) and pulse pressure (PP) were derived. Prolonged hospitalization was operationally defined as above-median length of stay in the study cohort (>4 days). Associations with prolonged hospitalization were evaluated using binary logistic regression models, while time to hospital discharge was analyzed using Cox proportional hazards regression. Discriminative performance was assessed using receiver operating characteristic (ROC) curve analysis, and time-to-event data were explored using Kaplan–Meier curves. Results: Prolonged hospitalization occurred in 33.3% of patients. In multivariate analyses, 24-hMAP (OR 1.64, 95% CI 1.05–2.55; p = 0.029) and 24-hPP (OR 1.71, 95% CI 1.06–2.74; p = 0.027) were independently associated with prolonged hospitalization. ROC curve analysis demonstrated AUC values of 0.866 and 0.859 for the 24-hMAP and 24-hPP models, respectively. At a 30% false-positive rate, the 24-hMAP model achieved approximately 90% sensitivity, whereas the 24-hPP model achieved approximately 90% specificity at a 30% false-negative rate. In time-to-event analyses, only 24 h MAP remained independently associated with time to hospital discharge (HR 0.75, 95% CI 0.62–0.89; p = 0.001). Conclusions: Both 24-hMAP and 24-hPP were independently associated with prolonged hospitalization whereas office BP-derived indices were not. These findings support that integrated ABPM-derived measures may provide complementary prognostic information beyond conventional BP assessments. Full article

This study investigated whether body-weight semi-squats (BWSSs) performed under blood-flow restriction (BFR) conditions were associated with higher post-conditioning drop-jump performance compared with the sham condition in adolescent female volleyball players. Thirteen players completed two experimental conditions (BFR and sham) in a randomized, counterbalanced crossover design. A pre-conditioning baseline jump assessment was not included. The BFR condition consisted of three sets of 16 repetitions with 80% of arterial occlusion pressure (AOP), whereas the sham condition was performed at 20% AOP. In each condition, participants performed one drop jump at 3, 6, 9, 12 and 15 min after the activation protocol. Jump height, impulse, reactive strength index (RSI) and power-related variables were analyzed using repeated-measures ANOVA. A significant main effect of condition indicated that jump height, RSI, impulse, and power-related variables were greater following the BFR than the sham condition across the post-conditioning assessment period. A significant main effect of time was also observed, with lower performance at 3 min compared to later time points. No condition-by-time interaction was found. These preliminary findings suggest that BWSSs performed under BFR conditions were associated with higher post-conditioning drop-jump performance than the sham condition. Low-load BFR exercise may therefore represent a practical strategy when heavy resistance equipment is unavailable. However, because no pre-conditioning baseline assessment was included, the magnitude of performance enhancement from baseline cannot be determined. Therefore, the findings should be interpreted as differences in post-conditioning performance between BFR and sham conditions rather than definite evidence of baseline to post enhancement. Full article

Cardiovascular diseases (CVDs) remain the leading cause of morbidity and mortality in the elderly worldwide. Over the past two decades, there has been a wealth of evidence of a close relationship between autonomic nervous system activity and cardiovascular mortality, including sudden cardiac death. Heart rate variability (HRV), derived from photoplethysmographic (PPG) signals, is increasingly recognized as a promising non-invasive digital marker for evaluating autonomic nervous system function and stratifying CVD risk. The application of machine learning algorithms to PPG-derived HRV analysis offers a promising approach for improving CVD risk stratification and facilitating the development of personalized medicine strategies. Background/Objectives: To evaluate the potential of heart rate variability indicators in predicting the risk of developing CVD in individuals aged 65 years and older. Methods: The study involved individuals aged 65 years and older, divided into two groups: those with a risk of developing CVD (n = 54) and those without risk (n = 46). The first stage included a questionnaire as well as anthropometric and hemodynamic measurements. At the second stage, a PPG was performed using the Eldar computer photoplethysmograph and Eldar-Vario software, followed by an analysis of time-domain and spectral HRV parameters. Statistical data analysis was conducted using the SPSS Statistics 22.0 software package, focusing on the evaluation of associations between HRV indicators and the presence of CVD. Interpretable machine learning models were developed using logistic regression and a random forest algorithm within a nested cross-validation framework. In addition to the discriminatory characteristics, Brier score, LogLoss, calibration analysis, error matrices, permutation importance, and SHAP interpretation were analyzed in the study. Results: In patients with cardiovascular diseases, a statistically significant decrease in heart rate variability was revealed: SDNN by 2 times (26 [Q1–Q3: 15, 35] ms), pNN50 by 3.5 times (4 [3, 5]%), TINN by 5 times (31 [20, 51] ms), and HRV by 2.5 times (6 [4, 8.7]). In addition, a decrease was seen in the spectral components of VLF by one-fold (2450 [Q1–Q3: 2450, 4500] ms²), LF by four-fold (750 [750, 1500] ms²) and HF by five-fold (450 [450, 750] ms²) (p < 0.05). At the same time, there was a significant increase in the VLF/HF and LF/HF ratios, which indicates a predominance of sympathetic activity. According to the results of the correlation analysis, statistically significant associations of HRV indicators with age, physical activity level, body mass index and systolic blood pressure were revealed. The results of machine learning also revealed the association of HRV with arterial hypertension, physical activity and BMI. The best final results were demonstrated by a random forest model with a combined set of clinical and HRV signs of HF and RMSSD (ROC-AUC was 0.9988). The signs of heart rate variability obtained by photoplethysmography demonstrated additional prognostic value in relation to clinical signs. PPG-derived HRV features demonstrated additional discriminatory value for cardiovascular risk stratification. Conclusions: The obtained data demonstrate a close association between the risk of developing cardiovascular disease and autonomic nervous system dysfunction. The decrease in heart rate variability is most pronounced in elderly individuals with existing cardiovascular disease and can be considered a potential tool for developing diagnostic, prognostic, and risk stratification strategies. The use of machine learning demonstrated that heart rate variability features obtained using photoplethysmography improve diagnostic prognostication and classification of cardiovascular diseases compared to models based solely on clinical data. Full article

Background: Rheumatoid arthritis (RA) is associated with increased cardiovascular risk beyond traditional risk factors. Carotid intima–media thickness (IMT) is a marker of subclinical atherosclerosis and may be influenced by chronic inflammation in RA. Objectives: This study aimed to compare carotid IMT between women with RA and age-matched controls, and to investigate the associations between IMT and RA-related factors, including disease duration, menopausal status, anti-cyclic citrullinated peptide (anti-CCP) antibodies and the CD4/CD8 T-cell ratio. Methods: This cross-sectional study included 59 women with RA and 55 age-matched controls. All RA patients received methotrexate and had no recent biologic DMARD exposure. Carotid IMT was measured by B-mode ultrasonography. Clinical, laboratory, and immunologic parameters, including anti-CCP antibodies and CD4/CD8 ratio, were analyzed. Results: Mean carotid IMT was significantly higher in RA patients than in controls (0.85 ± 0.09 vs. 0.63 ± 0.08 mm, p < 0.0001). Within the RA group, IMT correlated positively with disease duration (r = 0.48, p < 0.001), years since menopause (ρ = 0.44, p = 0.001), anti-CCP titers (r = 0.31, p = 0.018) and CD4/CD8 ratio (r = 0.42, p < 0.001), and inversely with CD8 T-cell counts (r = −0.34, p = 0.009). In multivariable analysis, RA duration and CD4/CD8 ratio remained independently associated with IMT after adjustment for age, lipids and blood pressure. Conclusions: Women with RA had greater carotid IMT than age-matched controls. Longer disease duration and a higher CD4/CD8 ratio were independently associated with IMT, supporting a link between cumulative disease burden, T-cell imbalance and subclinical carotid atherosclerosis in RA. These findings support routine cardiovascular risk assessment and consideration of vascular imaging in high-risk RA subgroups. Full article

Background: Acute compartment syndrome is a surgical emergency that is most often associated with trauma. Rarely, however, it can develop without major trauma in patients receiving anticoagulation therapy. Methods: A 53-year-old woman receiving warfarin therapy presented with progressive swelling and pain in the left forearm after physical therapy. Computed tomography angiography showed preserved arterial flow. On clinical examination, pain and paralysis were present, whereas pallor and paresthesia were absent. Direct compartment pressure measurements demonstrated markedly elevated pressures in the dorsal and deep volar compartments, measuring 88 mmHg and 110 mmHg, respectively. Emergency fasciotomy was performed approximately 9 h after symptom onset. Results: Intraoperative findings showed hematoma formation and partial muscle necrosis in the deep volar compartment. After surgery, persistent bleeding required repeated hemostatic interventions and blood-product transfusion. Negative-pressure wound therapy was applied, and delayed primary closure was subsequently performed. Anticoagulation therapy was temporarily discontinued and later resumed. The patient recovered without further bleeding, wound complications, or functional impairment and was discharged in stable condition. No complications, including hematoma recurrence or infection, were observed during 6 months of follow-up. Conclusions: This case highlights a temporal association between physical therapy and acute forearm compartment syndrome in a patient receiving anticoagulation therapy. It also emphasizes that preserved peripheral pulses and intact arterial flow do not exclude the diagnosis. Early recognition and prompt surgical intervention remain essential to prevent irreversible tissue damage and optimize outcomes. Full article

Background and Objectives: A relationship between cognitive decline (CD) and chronic coronary syndrome (CCS), common among the elderly population, has not yet been clearly established. Our study aims to evaluate the link between severe cognitive impairment and cognitive impairment, as measured by various neuropsychological tests in patients with or without CCS. In addition, we sought to identify cardiovascular risk factors (CVRFs) that influence the severity of CD and severe cognitive impairment. Materials and Methods: This observational study was conducted on 264 people with CVRFs. Of the 264, 132 were classified as patients with CCS and 132 as control subjects without CCS. Neuropsychological assessment tools included the Instrumental Activities of Daily Living (IADL) and Activities of Daily Living (ADL) scales, the Montreal Cognitive Assessment (MoCA), the Mini-Mental State Examination (MMSE), and the Geriatric Depression Scale (GDS-15). Clinical characteristics, echocardiographic measures, and vascular parameters of all subjects were also evaluated. Results: Patients with CCS had significantly lower cognitive performance (MMSE, p = 0.010; MoCA, p = 0.021), reduced functional status (IADL, p = 0.030; ADL, p = 0.012), and higher depression scores (p = 0.004) compared with controls. They also had worse cardiovascular profiles, including lower left ventricular ejection fraction (LVEF) (p = 0.001), higher NT-proBNP levels (p = 0.005), and increased carotid intima-media thickness (IMT) (p < 0.05). IMT and blood pressure values were negatively correlated with cognitive and functional scores and positively correlated with depression severity (p < 0.001). Multivariate analysis identified systolic and diastolic blood pressure, age, body mass index, heart rate, reduced daily activity, and depression as independent predictors of cognitive decline in patients with CCS. In the GDS-15 score, each unit increase was associated with a 32.1% higher risk of cognitive decline and a 37.1% higher risk of MMSE-defined severe cognitive impairment, while improved ADL scores significantly reduced this risk. Conclusions: CCS is associated with an increased risk of severe cognitive impairment and also with cognitive decline, influenced by hypertension, subclinical atherosclerosis, depression, and reduced functional status. These findings emphasize the importance of early identification and multidisciplinary management of cognitive impairment in patients with CCS to prevent progression to severe cognitive impairment. Full article

Background and Objectives: Ultrasound-guided placement of tunneled hemodialysis catheters may be useful when fluoroscopy is unavailable or radiation exposure should be avoided. This study describes a technique based on direct ultrasound visualization of the metallic guidewire within the right atrium and evaluates one-year clinical and functional outcomes. Materials and Methods: We conducted a single-center retrospective observational study of 319 adult hemodialysis patients undergoing tunneled catheter placement. The technique combined intravascular guidewire length measurement with subcostal ultrasound visualization of the guidewire tip in the right atrium. Baseline characteristics, insertion site, immediate complications, blood flow rate, Kt/V, and extracorporeal circuit pressures were analyzed. Results: Mean age was 55.9 ± 14.5 years, and 58.6% were women. The main causes of chronic kidney disease were diabetes mellitus and arterial hypertension. Mean blood flow rate was 349 mL/min at 3 months and 357 mL/min at 12 months. Mean Kt/V at 12 months was 1.57. No catheter malpositions requiring immediate repositioning were documented. Procedure-related complications were infrequent and mainly local. Conclusions: Ultrasound-guided tunneled catheter placement using direct visualization of the guidewire within the right atrium was technically feasible and associated with favorable functional parameters and few immediate complications. Given the retrospective design and lack of a comparative group, these findings should be interpreted with caution. Prospective comparative studies are needed to confirm safety, reproducibility, and clinical utility. Full article

Background/Aim: Albuminuria is a clinical marker associated with microvascular involvement and an independent predictor of cardiovascular risk. Polycystic ovary syndrome (PCOS) is associated with early metabolic and vascular abnormalities; however, whether albumin excretion differs across PCOS phenotypes remains unclear. This study aimed to evaluate the urinary albumin-to-creatinine ratio (U-ACR) across PCOS phenotypes and to examine its association with metabolic parameters. Materials and Methods: In this cross-sectional study, 180 women aged 18–35 years with PCOS and 51 age-matched healthy controls were included. PCOS phenotypes were classified according to the Rotterdam criteria as Phenotype A (n = 96), Phenotype B (n = 19), Phenotype C (n = 35), and Phenotype D (n = 30). Insulin resistance was assessed using the homeostasis model assessment for insulin resistance (HOMA-IR). Urinary albumin and creatinine levels were measured in morning urine samples, and U-ACR was calculated. Results: Age was comparable across all groups. Body mass index, waist circumference, diastolic blood pressure, and HOMA-IR were significantly higher in Phenotype A compared with controls and other phenotypes, reflecting a more adverse metabolic profile. Serum creatinine levels were similar across all groups. Despite this metabolic profile in Phenotype A, U-ACR was significantly elevated only in Phenotype B compared with controls (p = 0.018), and Phenotype D (p = 0.016). No significant correlations were observed between U-ACR and age, body mass index, or HOMA-IR. When participants were categorized according to U-ACR levels (<30, 30–299.9, and ≥300 mg/g creatinine), no significant differences in category distribution were observed between the total PCOS cohort, phenotype subgroups, and controls. Conclusion: Among PCOS phenotypes, U-ACR elevation was observed exclusively in Phenotype B despite similar renal function markers. This finding, in the presence of a more adverse metabolic profile in Phenotype A, suggests a dissociation between metabolic burden and early microvascular involvement across PCOS phenotypes. These findings suggest a potential phenotype-specific pattern that warrants further investigation. Full article

Background/Objectives: Myocardial blood flow (MBF) and myocardial flow reserve (MFR) are key measurements in myocardial perfusion imaging (MPI), with [¹⁵O]H₂O-PET considered the reference standard. To further establish clinical and research utility, we investigated intra-individual variability of MBF and MFR over time in patients with angina, but no obstructive coronary disease. Methods: In a routine clinical setting, we prospectively studied 21 patients, >50 years with normal left ventricular function and no known coronary stenosis, undergoing clinically indicated PET MPI. Scan and re-scan were conducted within 30 days. Analyses were conducted by general clinical staff and re-evaluated by an expert reader. Reproducibility was assessed using paired t-tests, Bland–Altman analysis, repeatability coefficient (RC), within-subject coefficient of variation (CV) and intraclass correlation coefficient (ICC). Results: Twenty-one patients (mean age 70 ± 8.2 years; 48% female) underwent repeated scans with a median interval of 21 days. Resting MBF was 0.91 ± 0.24 vs. 0.92 ± 0.22 mL/min/g (r = 0.87; RC 0.23 mL/min/g; CV 9%; ICC 0.87). Hyperaemic MBF averaged 3.06 ± 0.9 vs. 2.97 ± 0.78 mL/min/g (r = 0.83; RC 0.98 mL/min/g; CV 11.6%; ICC 0.81). MFR showed only moderate reproducibility (3.47 ± 1.23 vs. 3.23 ± 0.92; RC 1.90; CV 21%; ICC 0.60). Neither expert re-evaluation nor rate–pressure product correction of the resting MBF improved the reproducibility. Variability was largely unaffected by atrial fibrillation and diurnal variation. Conclusions: Resting and hyperaemic MBF are reproducible, whereas MFR shows moderate variability, which should be considered when interpreting changes in individual patients. Full article

Myxomatous mitral valve disease (MMVD) is the most common acquired cardiac disease in small-breed dogs and shows particularly high prevalence and early onset in Cavalier King Charles Spaniels (CKCS). Although MMVD is considered a complex, polygenic disease, the clinical relevance of individual genetic variants remains incompletely understood. The angiotensin-converting enzyme (ACE) gene variant rs850683722 has previously been associated with altered ACE activity and differences in renin–angiotensin–aldosterone system-related responses in dogs with MMVD. The aim of this study was to determine the prevalence of rs850683722 in a Polish population of CKCS dogs and to assess whether this variant is associated with the clinical course of MMVD. A total of 105 CKCS dogs were included in the study. All dogs underwent standardized cardiovascular evaluation, including echocardiography, electrocardiography, and systolic blood pressure measurement. MMVD diagnosis and staging were performed according to current ACVIM consensus criteria. Genotyping of the rs850683722 variant was performed using Sanger sequencing for 95 dogs, while next-generation sequencing data was obtained for 10 dogs. Genotype distribution, allele frequencies, conformity with the Hardy–Weinberg equilibrium (HWE), sex-related differences, and associations between genotype and age at progression to selected MMVD stages or the primary clinical endpoint were assessed statistically. The most frequent genotype was AA, detected in fifty-nine dogs, followed by GG in thirty-seven dogs and AG in nine dogs. When dogs carrying at least one A allele were considered variant-positive, the overall prevalence of the variant-positive genotype was 64.8%. The calculated allele frequencies were 0.605 for the A allele and 0.395 for the G allele. The observed genotype distribution deviated markedly from the Hardy–Weinberg equilibrium, mainly because of a pronounced deficit of heterozygous dogs. No significant association was detected between genotype and sex. Genotype was also not significantly associated with age at progression to stage B2 or stage C. A statistically significant difference in age of death was demonstrated by genotype, but this difference was not reflected in the survival analysis. The rs850683722 variant was highly prevalent in the studied Polish CKCS population, with a frequency comparable to previously reported data for this breed. Despite its documented biological association with ACE activity and RAAS-related responses, the variant was not significantly associated with the clinical progression of MMVD in this cohort. These findings suggest that rs850683722 alone seems unlikely to be a reliable marker for predicting the severity or rate of MMVD progression in Polish CKCS dogs. Further studies including larger cohorts, longer follow-up, pedigree information, and the direct assessment of RAAS activity may help clarify whether this variant has stage-dependent or treatment-related clinical relevance. Full article

Introduction: A major health issue in individuals living at high-altitude regions is an increase in the number of red blood cells (RBCs). This condition generates a series of physiological alterations including the nervous system, where damage can occur due to increased blood viscosity. This increased viscosity, in turn, could compromise oxygen uptake, potentially linked to a degree of cognitive impairment. Objective: To determine the association between exposure to chronic hypoxia and sleep quality with the degree of cognitive impairment in a young adult population residing at different altitude levels. Methodology: A cross-sectional study was conducted with 200 apparently healthy subjects (aged 21–26 years) permanently residing in four Peruvian cities: Lima (154 m), Arequipa (2335 m), Puno (3820 m), and La Rinconada (5100 m) (n = 50 per location). Physiological profiles (SpO₂, blood pressure, heart rate, hemoglobin, and hematocrit) were measured. Cognitive impairment and sleep quality were evaluated using the Montreal Cognitive Assessment (MoCA) and the Pittsburgh Sleep Quality Index (PSQI). Sex-stratified hierarchical multiple linear regression models with bootstrapping were utilized for independent correlation analysis. Results: Hemoglobin levels gradually increased with altitude, peaking at 19.47 ± 3.01 g/dL in La Rinconada, while SpO₂ decreased to 81.64%. Moderate-to-severe cognitive impairment was exclusively restricted to the extreme altitude population of La Rinconada, where only 10% of subjects remained unaffected. In the sex-stratified multivariate regression, residency in La Rinconada initially served as a robust negative predictor of MoCA scores among women (β = −5.52, p < 0.001); however, this geographical effect lost statistical significance after adjusting for biological variables in Model 2 (β = −4.72, p = 0.178). In the fully adjusted models, neither individual hemoglobin levels nor SpO₂ fluctuations displayed an independent linear association with cognitive performance in either sex (p > 0.05). Sleep quality was poor across cohorts but showed no significant association with cognitive impairment (p = 0.174). Conclusions: Chronic exposure to severe hypoxia (>5000 m) is associated with a greater presence of cognitive impairment, which is largely accounted for by individual physiological adaptations rather than isolated, linear effects of independent hematological or subjective sleep parameters. Full article

Background/Objectives: The gut–liver axis is central to sepsis, but assessing mesenteric perfusion remains challenging. Indocyanine green (ICG) clearance reflects hepatic blood flow. Since portal flow is derived from mesenteric circulation and supplies most of the liver, reduced ICG clearance may indicate mesenteric hypoperfusion, which can lead to enteral feeding intolerance (EFI). This study examines whether reduced ICG clearance in septic patients without overt liver injury is associated with EFI. Methods: This study is a secondary analysis of a prospective cohort study (March–May 2024, 20-bed ICU). Septic patients without sepsis-related liver injury or recent abdominal surgery were included. ICG plasma disappearance rate (ICG-PDR) was measured at admission; patients were grouped by ICG-PDR (≤18%/min vs. >18%/min). The primary outcome was EFI within 7 days. Multivariate logistic regression and correlation analyses were performed. Results: Among 77 patients (44 with ICG-PDR > 18%/min, 33 with ≤18%/min), the decreased ICG-PDR group had higher SOFA scores (8.4 ± 4.2 vs. 5.4 ± 3.5, p = 0.001) and higher EFI rates (66.7% vs. 43.1%, p = 0.041). Univariate analysis showed ICG-PDR ≤ 18%/min associated with EFI (OR = 2.632, p = 0.043), but this was attenuated after SOFA adjustment (OR = 2.247, p = 0.171). Reduced ICG-PDR correlated with central venous pressure (CVP) (r = 0.626, p < 0.001) but not with mean arterial pressure (r = −0.175, p = 0.129). Conclusions: In septic patients with preserved hepatocyte function, reduced ICG clearance is associated with EFI, but this relationship is largely explained by disease severity (SOFA). Reduced ICG clearance correlates with CVP; however, ICG-PDR cannot distinguish between portal venous and arterial inflow components. The exact mechanism remains speculative. Full article