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Depression is prevalent among patients with congestive heart failure (CHF) and is associated with increased mortality and healthcare use. However, most research on this association has focused on high-income countries, leaving a gap in knowledge regarding the relationship between depression and CHF in low-to-middle-income countries.
Aims
To identify changes in depressive symptoms and potential risk factors for poor outcomes among CHF patients.
Methods
Longitudinal data from 783 patients with CHF from public hospitals in Karachi, Pakistan, were analysed. Depressive symptom severity was assessed using the Beck Depression Inventory. Baseline and 6-month follow-up Beck Depression Inventory scores were clustered using Gaussian mixture modelling to identify separate depressive symptom subgroups and extract trajectory labels. Further, a random forest algorithm was used to determine baseline demographic, clinical and behavioural predictors for each trajectory.
Results
Four separate patterns of depressive symptom changes were identified: ‘good prognosis’, ‘remitting course’, ‘clinical worsening’ and ‘persistent course’. Key factors related to these classifications included behavioural and functional factors such as quality of life and disability, as well as the clinical severity of CHF. Specifically, poorer quality of life and New York Heart Association (NYHA) class 3 symptoms were linked to persistent depressive symptoms, whereas patients with less disability and without NYHA class 3 symptoms were more likely to exhibit a good prognosis.
Conclusions
By examining the progression of depressive symptoms, clinicians can better understand the factors influencing symptom development in patients with CHF and identify those who may require closer monitoring and appropriate follow-up care.
Warfarin is used as anticoagulation for children for a wide range of cardiac indications but carries the disadvantage of requiring international normalised ratio monitoring and dose adjustment. Management of warfarin therapy is challenging due to its narrow therapeutic window and is further complicated in children by dietary changes, frequent illnesses, and developing systems of metabolism and haemostasis.
A retrospective review was performed of patients’ medical records to assess the indication for warfarin use, percentage of international normalised ratio values in target range (%ITR), and frequency of phlebotomy.
Twenty-six patients were identified. The most common indication for warfarin use was in patients post-total cavo-pulmonary connection (n = 19, 73%). We demonstrated a variability in duration of warfarin therapy following total cavo-pulmonary connection (median of 11.1 months). Nineteen (73%) patients had used the CoaguChek machine for home measurement of international normalised ratio. The median frequency of phlebotomy for all indications was once every 10 days, and the median %ITR was 55.4 % (29.7–86.4%). Of note, the percentage under target range in the patients with mechanical mitral (n = 2) and aortic valves (n = 1) was found to be 23% and 33%, respectively.
These data demonstrate a high frequency of international normalised ratio values outside of the target range as seen in previous studies of warfarin in children. This necessitates frequent phlebotomy and dose changes, which can have a significant effect on the quality of life of these patients and their families highlighting the need to focus on quality improvement in the area of anticoagulation in paediatric cardiac patients.
Similar to adults with posttraumatic stress disorder, children with early life adversity show bias in memory for negative emotional stimuli. However, it is not well understood how childhood adversity impacts mechanisms underlying emotional memory. N = 56 children (8–14 years, 48% female) reported on adverse experiences including potentially traumatic events and underwent fMRI while attending to emotionally pleasant, neutral, or negative images. Post-scan, participants completed a cued recall test to assess memory for these images. Emotional difference-in-memory (DM) scores were computed by subtracting negative or positive from neutral recall performance. All children showed enhancing effects of emotion on recall, with no effect of trauma load. However, children with less trauma showed a larger emotional DM for both positive and negative stimuli when amygdala or anterior hippocampal activity was higher. In contrast, highly trauma-exposed children demonstrated a lower emotional DM with greater amygdala or hippocampal activity. This suggested that alternative neural mechanisms might support emotional enhancement of encoding in children with greater trauma load. Whole-brain analyses revealed that right fusiform activity during encoding positively correlated with both trauma load and successful later recall of positive images. Therefore, highly trauma-exposed children may use alternative, potentially adaptive neural pathways via the ventral visual stream to encode positive emotional events.
Many paediatric studies report that patients must be established on aspirin therapy for a minimum of 5 days to achieve adequate response. This is not always practical especially in critical settings. Prospective identification of patients that are unresponsive to aspirin sooner could potentially prevent thrombotic events.
Aims:
The aim of this study was to investigate prospectively if the first dose of aspirin is effective in decreasing platelet aggregation, and thromboxane formation and if this can be measured after 2 hours in paediatric cardiology patients. A secondary aim was to identify a cut-off for a novel marker of aspirin responsiveness the maximum amplitude with arachidonic acid, which could potentially dramatically reduce the blood volume required. Third, we aimed to prospectively identify potentially non-responsive patients by spiking a sample of their blood ex vivo with aspirin.
Results:
The majority (92.3%) of patients were responsive, when measured 2 hours post first dose of aspirin. Non-response or inadequate response (7.7%) can also be identified at 2 hours after taking the first dose of aspirin. Additionally, we have shown a novel way to reduce blood sample volume requirements by measurement of the maximum amplitude with arachidonic acid as a marker of response, particularly for monitoring.
Conclusions:
These findings of rapid efficacy in the majority of patients offer assurance in a sound, practical way to attending clinicians, patients, and families.
With the rise of online references, podcasts, webinars, self-test tools, and social media, it is worthwhile to understand whether textbooks continue to provide value in medical education, and to assess the capacity they serve during fellowship training.
Methods:
A prospective mixed-methods study based on surveys that were disseminated to seven paediatric cardiology fellowship programmes around the world. Participants were asked to read an assigned chapter of Anderson’s Pediatric Cardiology 4th Edition textbook, followed by the completion of the survey. Open-ended questions included theming and grouping responses as appropriate.
Results:
The survey was completed by 36 participants. When asked about the content, organisation, and utility of the chapter, responses were generally positive, at greater than 89%. The chapters, overall, were rated relatively easy to read, scoring at 6.91, with standard deviations plus or minus 1.72, on a scale from 1 to 10, with higher values meaning better results. When asked to rank their preferences in where they obtain educational content, textbooks were ranked the second highest, with in-person teaching ranking first. Several themes were identified including the limitations of the use of textbook use, their value, and ways to enhance learning from their reading. There was also a near-unanimous desire for more time to self-learn and read during fellowship.
Conclusions:
Textbooks are still highly valued by trainees. Many opportunities exist, nonetheless, to improve how they can be organised to deliver information optimally. Future efforts should look towards making them more accessible, and to include more resources for asynchronous learning.
The crystal structure of anhydrous Al-MFI (NH4) containing adsorbed Ar has been determined and refined using synchrotron X-ray powder diffraction data taken at 90 K, and optimized using density functional theory techniques. Six highly occupied Ar sites almost completely fill the pore volume of the zeolite. Changing the gas flow from Ar to He at 90 K decreases the Ar occupancies of all six sites, but two decrease more than the others. Warming the sample from 90 to 295 K in Ar flow results in further decreases in site occupancies, but five of the original six sites persist.
CHD is a significant risk factor for the development of necrotising enterocolitis. Existing literature does not differentiate between term and preterm populations. Long-term outcomes of these patients are not well understood. The aim was to investigate the baseline characteristics and outcomes of term normal birth weight infants with CHD who developed necrotising enterocolitis.
Methods:
A retrospective review was performed of infants from a single tertiary centre with CHD who developed necrotising enterocolitis of Bell’s Stage 1–3, over a ten-year period. Inclusion criteria was those born greater than 36 weeks’ gestation and birth weight over 2500g. Exclusion criteria included congenital gastro-intestinal abnormalities. Sub-group analysis was performed using Fisher’s exact test.
Results:
Twenty-five patients were identified, with a median gestational age of 38 weeks. Patients with univentricular physiology accounted for 32% (n = 8) and 52% of patients (n = 13) had a duct-dependent lesion. Atrioventricular septal defect was the most common cardiac diagnosis (n = 6, 24%). Patients with trisomy 21 accounted for 20% of cases. Mortality within 30 days of necrotising enterocolitis was 20%. Long-term mortality was 40%, which increased with increasing Bell’s Stage. In total, 36% (n = 9) required surgical management of necrotising enterocolitis, the rate of which was significantly higher in trisomy 21 cases (p < 0.05).
Conclusion:
Not previously described in term infants is the high rate of trisomy 21 and atrioventricular septal defect. This may reflect higher baseline incidence in our population. Infants with trisomy 21 were more likely to develop surgical necrotising enterocolitis. Mortality at long-term follow-up was high in patients with Bell’s Stage 2–3.
Surgical repair of channels between the ventricles is enhanced when the surgeon knows precisely where to place a patch, or baffle, so as to restore septal integrity. The paediatric cardiologist should provide the necessary information. Communication will be enhanced if the same words are used to account for the structures in question. Currently, however, the same term, namely “ventricular septal defect,” is used to account for markedly different areas within the heart. Closure of perimembranous defects found in hearts with concordant or discordant ventriculo-arterial connections restores the integrity of the ventricular septum, at the same time separating the systemic and pulmonary blood streams. When both arterial trunks arise from the right ventricle, in contrast, the surgeon when placing a baffle so as to separate the blood streams, does not close the channel most frequently described as the “ventricular septal defect.” In this review, we show that the perimembranous lesions as found in hearts with concordant or discordant ventriculo-arterial connections are the right ventricular entrances to the areas subtended beneath the hinges of the leaflets of the aortic or pulmonary valves. When both arterial trunks arise from the right ventricle, and the channel between the ventricles is directly subaortic, then the channel termed the “ventricular septal defect” is the left ventricular entrance to the comparable space subtended beneath the aortic root. We argue that recognition of these fundamental anatomical differences enhances the appreciation of the underlying morphology of the various lesions that reflect transfer, during cardiac development, of the aortic root from the morphologically right to the morphologically left ventricle.
This book explores the right of access to environmental information, considering both the environmental aspirations which underlie the right and how far these are evidenced in the right's use in practice. The right has a history separate from wider moves towards freedom of information. From its origins in the Rio Declaration to its current embodiment in the Aarhus Convention, a key aim of the right is to promote environmental governance and protect the environment through the provision of environmental information, both proactively and upon request.
However, there is little empirical evidence to show whether the right is achieving these environmental aims, if it is being used for its intended environmental purpose, or even how far it is being viewed as distinct from the general right to information. This book seeks to fill this gap through qualitative research conducted in Scotland, the findings of which highlight that individuals who seek environmental information under the right are often doing so for personal or professional reasons that do not further the right's environmental purpose. This is significant, because if the right is not being used for its intended environmental purpose, then its contribution to environmental governance can be questioned, as can the value of maintaining this specific right, distinct from wider freedom of information laws.
Dentists prescribe 10% of all outpatient antibiotics in the United States and are the top specialty prescriber. Data on current antibiotic prescribing trends are scarce. Therefore, we evaluated trends in antibiotic prescribing rates by dentists, and we further assessed whether these trends differed by agent, specialty, and by patient characteristics.
Design:
Retrospective study of dental antibiotic prescribing included data from the IQVIA Longitudinal Prescription Data set from January 1, 2012 to December 31, 2019.
Methods:
The change in the dentist prescribing rate and mean days’ supply were evaluated using linear regression models.
Results:
Dentists wrote >216 million antibiotic prescriptions between 2012 and 2019. The annual dental antibiotic prescribing rate remained steady over time (P = .5915). However, the dental prescribing rate (antibiotic prescriptions per 1,000 dentists) increased in the Northeast (by 1,313 antibiotics per 1,000 dentists per year), among oral and maxillofacial surgeons (n = 13,054), prosthodontists (n = 2,381), endodontists (n = 2,255), periodontists (n = 1,961), and for amoxicillin (n = 2,562; P < .04 for all). The mean days’ supply significantly decreased over the study period by 0.023 days per 1,000 dentists per year (P < .001).
Conclusions:
From 2012 to 2019, dental prescribing rates for antibiotics remained unchanged, despite decreases in antibiotic prescribing nationally and changes in guidelines during the study period. However, mean days’ supply decreased over time. Dental specialties, such as oral and maxillofacial surgeons, had the highest prescribing rate with increases over time. Antibiotic stewardship efforts to improve unnecessary prescribing by dentists and targeting dental specialists may decrease overall antibiotic prescribing rates by dentists.
We examine the predictability of stock returns using implied volatility spreads (VS) from individual (nonindex) options. VS can occur under simple no-arbitrage conditions for American options when volatility is time-varying, suggesting that the VS-return predictability could be an artifact of firms’ sensitivities to aggregate volatility. Examining this empirically, we find that the predictability changes systematically with aggregate volatility and is positively related to the firms’ sensitivities to volatility risk. The alpha generated by VS hedge portfolios can be explained by aggregate volatility risk factors. Our results cannot be explained by firm-specific informed trading, transaction costs, or liquidity.
Wearable robotic devices (WRD) are still struggling to fulfill their vast potential. Inadequate daily life usability is one of the main hindrances to increased technology acceptance. Improving usability evaluation practices during the development of WRD could help address these limitations. In this work, we present the design and validation of a novel online platform aiming to fill this gap, the Interactive Usability Toolbox (IUT). This platform consists of a public website that offers an interactive, context-specific search within a database of 154 user research methods and educational information about usability. In a dedicated study, the effect of this platform to support usability evaluation was investigated. Twelve WRD experts were asked to complete the task of defining usability evaluation protocols for two specific use cases. The platform was provided to support one of the use cases. The quality and composition of the proposed protocols were assessed by (i) two blinded reviewers, (ii) the participants themselves, and (iii) the study coordinators. We showed that using the IUT significantly affected the proposed evaluation focus, shifting protocols from mainly effectiveness-oriented to more user-focused studies. The protocol quality, as rated by the external reviewers, remained equivalent to those designed with conventional strategies. A mixed-method usability evaluation of the platform yielded an overall positive image, with detailed suggestions for further improvements. The IUT is expected to positively affect the evaluation and development of WRD through its educational value, the context-specific recommendations supporting ongoing benchmarking endeavors, and highlighting the value of qualitative user research.
The previous chapter focused on professional users of the right to access environmental information and highlighted the stark mismatch between the expectations which underpin the right’s intended use and how the right is actually used in practice. Professional users serve as a clear example of this mismatch because the underpinning assumptions which animate the right and its legal regimes do not cater for this minority category of users. However, considering this mismatch in that context also provides the opportunity to identify whether the same is true for “personal users”. Personal users – the majority of those using the right – are more likely to be engaging directly with the environmental information held by public authorities and with the right’s environmental and participative aims. Yet, as with those in the professional user category, the individual actors within this second group are also diverse in terms of what motivates them, how they use information obtained and their levels of expertise in engaging with public authorities and the right itself. Thus, mismatches such as those identified in the context of professional users also arise in relation to personal users.
INTRODUCTION
The differences between personal users are key to how they experience and engage with the right of access to environmental information. These differences can be split into two themes. The first of these relates to the motive of personal users, referring to what drives these users to engage with the right and seek access to environmental information. The second theme relates to the levels of expertise that different users hold, encapsulating different aspects such as the ability in seeking proactively disclosed information, drafting and submitting requests for environmental information, and understanding any information accessed under the right. Such variety distinguishes different personal users from each other, creating a complex tapestry of personal users who are each engaging with the right in their own way and for their own reasons.
Although the environment may be intended to be the ultimate beneficiary, within the Aarhus Convention and the Environmental Information (Scotland) Regulations 2004 (EI(S)R) that give it effect in Scotland, users of the right are the actors who can claim direct benefits. It is therefore crucial that analysis of the right considers its users. It is these users who engage with the Convention’s moral duty to “protect and improve the environment for the benefit of present and future generations” and who exercise the right to seek access to environmental information through the proactive disclosure efforts of public authorities and the procedures set out in the EI(S)R. As a result, it is important to build both an appreciation of how the law perceives and constructs a vision of the users of the right to environmental information and an empirical understanding of who the users are and what they are doing.
INTRODUCTION
The starting point for understanding how the Aarhus Convention and the EI(S)R view users of the right is through the broad nature of the moral duty imposed on users to protect and improve the environment by participating in environmental decision-making processes. This duty is significant because it shapes expectations regarding how and why users engage with the right. Specifically, there is an assumption that users will be directly using the environmental information they access to “observe this duty” and fulfil their assumed altruistic, environmentally driven motivations for engaging with the right – a perspective reinforced by the legal instruments that preceded the Aarhus Convention. Further, users are expected to hold the necessary expertise effectively to understand and make use of the information they access for these purposes.
Yet while the Aarhus Convention holds these assumptions regarding those using the right, they are not fully reflected in the Convention’s provisions themselves. Under the Aarhus Convention, it is “the public” who can utilise its procedural rights, with “the public” being defined as:
One or more natural or legal persons, and, in accordance with national legislation or practice, their associations, organizations or groups.
The starting point for the creation of a right to environmental information is “the need to protect, preserve and improve the state of the environment and to ensure sustainable and environmentally sound development”. This need has become all the more pressing at a time of significant anthropogenic environmental change. However, the right of access to environmental information is framed in a way that primarily emphasises the concerns and needs of humanity. While this anthropocentric framing influences the interpretation of the right’s environmental aims, it also emphasises the role of human actors, particularly users of the right, in the operation of the right itself. Yet human actors are not the only actors that exert influence over how the right is guaranteed, implemented and utilised in practice; non-human actors influence how the right to environmental information is guaranteed. Notable examples of such actors include technology and the law, which influence the interactions between other actors, and the environment itself, an actor given limited attention both by the right itself and its implementing legal instruments. The role and impact of these actors remains unexplored, to the detriment both of how the right is implemented in practice and of how it seeks to achieve and understand its own environmental and participative aims. This chapter will discuss how to give better consideration to these actors and, in particular, will argue for the need to give more attention to the environment as an actor.
INTRODUCTION
Actor-Network Theory is concerned with the “the tracing of associations” between different actors in order to understand how they each engage with and interact with each other within society. It is these associations between the different actors which construct the “actor-network”, a network which is built up through the connections made between different actors. Through the construction of the actor-network, Actor-Network Theory provides a useful perspective to analyse and understand the operation of various aspects of society, including the right of access to environmental information.
This book has shown that the reality of the exercise of the right of public access to environmental information is rather different from and more complicated than much of the discussion of the topic suggests. From the Rio Declaration through the Aarhus Convention to the Environmental Information (Scotland) Regulations 2004 (EI(S)R), the provision of information is seen as a means of promoting the development of environmentally engaged citizens and enabling them to participate effectively in decision-making procedures with a view to protecting and enhancing the environment. Only a few of the uses fit well with this vision and, even when they do, users are left frustrated that they are not able to exercise more influence over decision-making procedures. As such, there is a gap between the aspirations of the right and the reality of its use that needs to be considered.
The most basic point perhaps is the low level of awareness of the existence of the particular right to environmental information that is distinct from any entitlements under more general laws on freedom of information and that lies behind information being accessible. Whether or not the use of the right is recognised as such by those involved, the practice does not always match the aspirations that lie behind it. The parties involved are more diverse than can be encapsulated in a single category of “users” or “holders” of information, and their relationships are shaped by their engagement not only with each other but also with a range of non-human actors. In addition, their motivations are often very different from the environmental objectives that providing access to environmental information was designed to serve. The overall result is a system where mismatches arise as a result of different motives and expectations, leading to frustrations and getting in the way of the right always being smoothly and successfully implemented. That different actors will define success in relation to the right differently, particularly in terms of focusing on procedural or substantive outcomes of engaging with the right, adds to the complexity.