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BackgroundMitral valve prolapse (MVP) is the primary cause of mitral regurgitation (MR) requiring surgical intervention and is associated with adverse cardiovascular events. The natural course of MVP is poorly described and critical for both risk assessment and designing follow-up programs. This study aimed to determine the progression rate of MR in MVP patients, and the event rates for all-cause mortality, heart failure development and need for mitral valve intervention.MethodsA systematic search was conducted using MEDLINE, EMBASE, and the Cochrane Library databases until July 2023 to identify studies including patients with MVP diagnosed by two-dimensional transthoracic echocardiography with at least one follow-up year reporting any of the outcomes of interest. The ratio between the number of events and the total person follow-up years (persons at risk x mean follow up period in years) was used to determine event rates, accounting for study differences in follow-up time. Pooled event rates and their 95% confidence intervals (CI) were calculated using random effects model. Subgroup analyses were conducted for baseline MR severity.ResultsSeven studies including 651 patients with a mean follow-up time of 6.1 ± 3.4 years, contributed to a total of 3386 person-years of follow-up. MR progressed in 35% (95% 26.29–44.81%), at a rate of 6.02 (95% CI 4.14–8.69) per 100 person years (figure 1). Moderate MR at baseline showed significantly higher rate of progression towards severe MR, compared to mild MR at baseline (11.61 Vs 1.54 per 100 person years, p=0.02) (figure 2). Risk factors for progression included bi-leaflet prolapse, isolated posterior leaflet prolapse, greater leaflet displacement, as well as age and baseline MR severity.Event rates for all-cause mortality, development of heart failure and need for mitral valve intervention were 1.69, 0.97 and 1.10 per 100 person years, respectively. Predictors of events included age > 50 years, moderate to severe MR, LVEF < 50%, posterior mitral valve leaflet prolapse and left atrial size > 40 mm.ConclusionThis meta-analysis showed that in patients with MVP, MR progresses at a rate of 6.02 per 100 person years overall, and at a rate twice as fast from a moderate to severe MR grade. Although the risk of adverse outcomes is low there is a need for closer monitoring patients with risk factors for either progression or adverse events.Abstract 13 Figure 1Meta-analysis for rate of MR progression (per 100 person years)Abstract 13 Figure 2Meta-analysis for rate of MR progression (per 100 person years) stratified by baseline MR severityConflict of Interestno

Paclitaxel is an anticancer agent efficacious in various tumors. There is large interindividual variability in drug plasma concentrations resulting in a wide variability in observed toxicity in patients. Studies have shown the time the concentration of paclitaxel exceeds 0.05 µM is a predictive parameter of toxicity, making dose individualization potentially useful in reducing the adverse effects. To determine paclitaxel drug concentration, a venous blood sample collected 24 h following the end of infusion is required, often inconvenient for patients. Alternatively, using a microsampling device for self-sampling would facilitate paclitaxel monitoring regardless of the patient’s location. We investigated the feasibility of collecting venous and capillary samples (using a Mitra® device) from cancer patients to determine the paclitaxel concentrations. The relationship between the venous plasma and whole blood and venous and capillary blood (on Mitra®) paclitaxel concentrations, defined by a Passing–Bablok regression, were 0.8433 and 0.8569, respectively. Demonstrating a clinically acceptable relationship between plasma and whole blood paclitaxel concentration would reduce the need to establish new target concentrations in whole blood. However, in this study, comparison of venous and capillary blood using Mitra® for sampling displayed wide confidence intervals suggesting the results from the plasma and whole blood on this device may not be interchangeable.

Abstract Background Triple therapy (TT) consisting of furosemide, pimobendan, and an angiotensin-converting enzyme inhibitor (ACEI) frequently is recommended for the treatment of congestive heart failure (CHF) attributable to myxomatous mitral valve disease (MMVD). However, the effect of adding an ACEI to the combination of pimobendan and furosemide (dual therapy [DT]) so far has not been evaluated prospectively. Hypothesis Triple therapy will extend survival time compared to DT in dogs with CHF secondary to MMVD. Animals Client-owned dogs presented with the first episode of CHF caused by MMVD. Methods Prospective, single-blinded, randomized multicenter study. One-hundred and fifty-eight dogs were recruited and prospectively randomized to receive either DT (furosemide and pimobendan) or TT (furosemide, pimobendan, and ramipril). The primary endpoint was a composite of cardiac death, euthanasia for heart failure, or treatment failure. Results Seventy-seven dogs were randomized to receive DT and 79 to receive TT. Two dogs were excluded from analysis. The primary endpoint was reached by 136 dogs (87%; 66 dogs, DT; 70 dogs, TT). Median time to reach the primary endpoint for all dogs in the study was 214 days (95% confidence interval [CI], 168-259 days). Median time to reach the primary endpoint was not significantly different between the DT group (227 days; interquartile range [IQR], 103-636 days) compared with TT group (186 days; IQR, 72-453 days; P = .42). Conclusions and Clinical Importance Addition of the ACEI ramipril to pimobendan and furosemide did not have any beneficial effect on survival time in dogs with CHF secondary to MMVD.

In toxicology, screenings are routinely performed using chromatographic methods coupled to detection systems such as high-resolution mass spectrometry (HR/MS). The increase in specificity and sensitivity of HRMS is responsible for the development of methods for alternative samples such as Volumetric Adsorptive Micro-Sampling. Whole blood overloaded with 90 drugs was sampled with 20 µL MitraTM to optimize the pre-analytical step as well as to determine the identification limits of drugs. Elution of chemicals was carried out in a solvent mixture through agitation and sonication. After dissolution, 10 μL was injected into the chromatographic system coupled to the OrbitrapTM HR/MS. Compounds were confirmed against the laboratory library. The clinical feasibility was assessed in fifteen poisoned patients using the simultaneous sampling of plasma, whole blood and MitraTM. The optimized extraction procedure allowed us to confirm 87 compounds out of the 90 present in the spiked whole blood. Cannabis derivatives were not detected. For 82.2% of the investigated drugs, the identification limits were below 12.5 ng·mL−1, with the extraction yields ranging from 80.6 to 108.7%. Regarding the patients’ analysis, 98% of the compounds in plasma were detected in MitraTM compared to whole blood, with a satisfying concordance (R2 = 0.827). Our novel screening approach opens new insights into different toxicologic fields appropriate for pediatrics, forensics or to perform mass screening.

The aim of this study was to develop and validate a LC-MS/MS assay for tacrolimus, sirolimus, everolimus, cyclosporin A and mycophenolic acid using volumetric absorptive microsampling tips as a sampling device and to investigate the effect on the recoveries of the analyte concentration in combination with the hematocrit (HT), which included temsirolimus (a structural analog). The maximum observed overall bias was 9.6% for the sirolimus LLOQ, while the maximum overall coefficient of variation was 8.3% for the everolimus LLOQ. All five immunosuppressants demonstrated to be stable in the volumetic absorbtive microsampling tips for at least 14 days at 25°C. Biases caused by HT effects were within 15% for all immunosuppressants between HT levels of 0.20 and 0.60 l/l, except for cyclosporin A, which was valid between 0.27 and 0.60 l/l. Reduced recoveries were observed at high analyte concentrations in combination with low HT values for sirolimus, everolimus and temsirolimus. A robust extraction and analysis method in volumetric absorptive microsampling tips was developed and fully validated. HT- and concentration-related recovery effects were observed but were within requirements of the purpose of the analytical method.

Chaetoceros is one of the most species rich, widespread and abundant diatom genera in marine and brackish habitats worldwide. It therefore forms an excellent model for in-depth biodiversity studies, assessing morphological and genetic differentiation among groups of strains. The global Chaetoceros lorenzianus complex presently comprises three species known to science. However, our recent studies have shown that the group includes several previously unknown species. In this article, 50 strains, mainly from high latitudes and from warm-temperate waters, were examined morphologically and genetically and the results compared with those of field studies from elsewhere. The strains clustered into five groups, two of which are formed by C. decipiens Cleve and C. mitra (Bailey) Cleve, respectively. Their species descriptions are emended based on samples collected close to the type localities. The three other groups are formed by new species, C. elegans sp. nov., C. laevisporus sp. nov. and C. mannaii sp. nov. Characters used to distinguish each species are: orientation of setae, shape and size of the apertures, shape, size and density of the poroids on the setae and, at least in some species, characters of the resting spores. Our aim is to cover the global species diversity in this complex, as correct species delineation is the basis for exploring biodiversity, distribution of organisms, interactions in the food web and effects of environmental changes.

Background Rural populations in Bihar, India, face significant healthcare access challenges due to geographical, infrastructural, and financial barriers. The Swasthya Mitra program, initiated by the Bihar Rural Livelihood Promotion Society in collaboration with local and international partners, aims to mitigate these challenges by employing trained community members to navigate patients through the healthcare system. Methods This qualitative study employed in-depth interview and thematic analysis to evaluate the Swasthya Mitra program in the Bhagalpur and Jamui districts in Bihar, India. The participants included Swasthya Mitras, healthcare professionals, and beneficiaries. This study focused on understanding the role of Swasthya Mitras in facilitating healthcare services. Findings The program improved healthcare access for rural populations, with beneficiaries reporting reduced navigational confusion, decreased out-of-pocket expenditures, and enhanced patient care. Swasthya Mitras bridged the gap between the community and healthcare facilities. The program also empowered women, both Swasthya Mitras and beneficiaries, by improving their access to healthcare and increasing their involvement in health-related decision-making. Interpretation The Swasthya Mitra program may offer a viable model for improving healthcare access in rural settings, demonstrating the importance of community involvement in healthcare delivery. The findings suggested that such programs can be instrumental in overcoming barriers to healthcare access and reducing financial burdens on vulnerable populations. Funding The study was supported by the Bihar Rural Livelihood Promotion Society supported by the World Bank and Project Concern Internation India.

The news industry is still dominated by men.Yet women have exercised leadership in journalism and related media professions in a variety of ways, from moral leadership to experimenting with structural and technological innovations and pioneering new formats to serve new audiences.

Cultural ecosystem services embedded in urban green spaces play a vital yet often underappreciated role in shaping tourists' well-being. This study investigates the perceived contributions of cultural ecosystem services to tourist well-being in Zaribar Coastal Park, a multifunctional urban green space located in Kurdistan Province, Iran. Drawing on the Millennium Ecosystem Assessment framework, ten cultural ecosystem services dimensions were examined through a structured survey of 300 domestic tourists. The sample was selected via Mitra and Lankford's method, and data were analyzed using partial least squares structural equation modeling. Findings reveal that outdoor recreation, aesthetic appreciation, social relations, cultural heritage, educational values, and sense of place significantly enhance tourists' well-being, while cultural diversity, inspiration, knowledge systems, and spiritual values exerted limited or statistically insignificant effects. This study advances theoretical understanding by refining the cultural ecosystem services-well-being linkage within urban tourism contexts and demonstrating the contextual specificity of cultural ecosystem services impacts. Practically, the findings underscore the need for tourism planners and policymakers to integrate cultural ecosystem services into destination design and management strategies. Prioritizing experiential, aesthetic, and recreational dimensions of cultural ecosystem services can foster more inclusive, sustainable, and human-centered urban tourism models.

An efficient in vitro plant regeneration system was established through somatic embryogenesis for Anoectochilus elatus Lindley, an endangered jewel orchid. Direct somatic embryogenesis was achieved from nodal explants (17.4 embryos per explant with 63.4% response) on Mitra medium supplemented with Morel vitamins, thidiazuron (4.54 µM) and ∞-naphthaleneacetic acid (2.69 µM). Simultaneously, a protocol was developed for indirect somatic embryogenesis from internodal explant, produced embryogenic calli and embryos (31.3 embryos with 76.4% response) on same medium amended with 50 mg/L peptone and 5% coconut water. Both types of embryogenic pathways, produced morphologically similar globular embryos in the form of protocorm like bodies and successfully germinated on hormone free Mitra medium supplemented with Morel vitamins. Morpho-histological investigation of the embryo revealed the initiation and developmental features of somatic embryos. In vitro regenerated plantlets were successfully established from heterotrophic to a photoautotrophic stage by reducing the nutrient content in culture media, adjusting temperature and humidity through three step method. During the process, no morphological and physiological abnormalities were observed. Hardened plantlets were successfully acclimatized at poly tunnel chamber with 95% of survival rate. Further, inter simple sequence repeats (ISSRs) molecular markers were used to analyse the genetic homogeneity of regenerated plants. Analysis with this method showed that the homogeneity is comparatively higher in direct somatic embryo regenerated plants (94.22%) as compared to plants elevated from an indirect somatic embryo (93.05%). The present study provides morpho-histological and genetically stable plants for germplasm conservation and further utility of this endangered jewel orchid.