65 research outputs found

    Transannular patching is a valid alternative for tetralogy of Fallot and complete atrioventricular septal defect repair

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    Objective: We report our experience with repair of tetralogy of Fallot associated with complete atrioventricular septal defect, addressing in particular the need for a pulmonary valve in the right ventricular outflow tract. Methods: Between 1992 and 2006, 33 children with tetralogy of Fallot and complete atrioventricular septal defect were admitted; 26 had Down’s syndrome (79%). Thirty-two children had complete repair (18 primary, 14 staged); of the 15 who received initial palliation, 1 died before complete repair. Right ventricular outflow tract obstruction was relieved by transannular patch in 14 cases (42%), infundibular patch with preservation of the pulmonary valve in 7 (21%), and right ventricle–to–pulmonary artery conduit in 11 (33%). Results: There were no hospital deaths. Actuarial survival was 96% 3.9% at 5 years and 85.9 1.1% at 10 years. Multivariate analysis showed that type of relief of right ventricular outflow tract obstruction did not influence survival (P ¼ .16), nor did the choice to use a valved conduit (P ¼ .82). Primary correction (P ¼ .05) and lower weight at repair (P ¼ .05) were associated with higher probability of survival. Mean follow-up was 69.3 5.9 months (range 0.2–282 months). There were 2 late deaths. Overall freedom from reoperation was 69% at 5 years and 38%at 10 years. Right ventricular outflow tract reconstruction without use of a valved conduit allowed a significantly higher freedom from reinterventions (P<.05). Conclusions: Tetralogy of Fallot associated with complete atrioventricular septal defect can be corrected at low risk with favorable intermediate survival. Use of right ventricle–to–pulmonary artery conduit can be avoided in two thirds of patients with no impact on survival, possibly improving overall freedom from reintervention

    Criminal and Noncriminal Psychopathy: The Devil is in the Detail

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    Brooks, NS ORCiD: 0000-0003-1784-099XPsychopathy is prevalent and problematic in criminal populations, but is also found to be present in noncriminal populations. In 1992, Robert Hare declared that psychopaths may also “be found in the boardroom”, which has since been followed by an interest in the issue of noncriminal, or even successful, psychopathy. In this chapter, the paradox of criminal and noncriminal psychopathy is discussed with specific attention given to the similarities and differences that account for psychopathic personality across contexts. That psychopathy is a condition typified by a constellation of traits and behaviours requires wider research across diverse populations, and thus the streams of research related to criminal and noncriminal psychopathy are presented and the implications of these contrasting streams are explored

    Planetary population synthesis

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    In stellar astrophysics, the technique of population synthesis has been successfully used for several decades. For planets, it is in contrast still a young method which only became important in recent years because of the rapid increase of the number of known extrasolar planets, and the associated growth of statistical observational constraints. With planetary population synthesis, the theory of planet formation and evolution can be put to the test against these constraints. In this review of planetary population synthesis, we first briefly list key observational constraints. Then, the work flow in the method and its two main components are presented, namely global end-to-end models that predict planetary system properties directly from protoplanetary disk properties and probability distributions for these initial conditions. An overview of various population synthesis models in the literature is given. The sub-models for the physical processes considered in global models are described: the evolution of the protoplanetary disk, the planets' accretion of solids and gas, orbital migration, and N-body interactions among concurrently growing protoplanets. Next, typical population synthesis results are illustrated in the form of new syntheses obtained with the latest generation of the Bern model. Planetary formation tracks, the distribution of planets in the mass-distance and radius-distance plane, the planetary mass function, and the distributions of planetary radii, semimajor axes, and luminosities are shown, linked to underlying physical processes, and compared with their observational counterparts. We finish by highlighting the most important predictions made by population synthesis models and discuss the lessons learned from these predictions - both those later observationally confirmed and those rejected.Comment: 47 pages, 12 figures. Invited review accepted for publication in the 'Handbook of Exoplanets', planet formation section, section editor: Ralph Pudritz, Springer reference works, Juan Antonio Belmonte and Hans Deeg, Ed

    Relationship between low Ankle-Brachial Index and rapid renal function decline in patients with atrial fibrillation: A prospective multicentre cohort study

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    OBJECTIVE: To investigate the relationship between Ankle-Brachial Index (ABI) and renal function progression in patients with atrial fibrillation (AF). DESIGN: Observational prospective multicentre cohort study. SETTING:Atherothrombosis Center of I Clinica Medica of 'Sapienza' University of Rome; Department of Medical and Surgical Sciences of University Magna Græcia of Catanzaro; Atrial Fibrillation Registry for Ankle-Brachial Index Prevalence Assessment-Collaborative Italian Study. PARTICIPANTS: 897 AF patients on treatment with vitamin K antagonists. MAIN OUTCOME MEASURES: The relationship between basal ABI and renal function progression, assessed by the estimated Glomerular Filtration Rate (eGFR) calculated with the CKD-EPI formula at baseline and after 2 years of follow-up. The rapid decline in eGFR, defined as a decline in eGFR >5 mL/min/1.73 m(2)/year, and incident eGFR<60 mL/min/1.73 m(2) were primary and secondary end points, respectively. RESULTS: Mean age was 71.8±9.0 years and 41.8% were women. Low ABI (ie, ≤0.90) was present in 194 (21.6%) patients. Baseline median eGFR was 72.7 mL/min/1.73 m(2), and 28.7% patients had an eGFR60 mL/min/1.73 m(2), 153 (23.9%) had a reduction of the eGFR <60 mL/min/1.73 m(2). ABI ≤0.90 was also an independent predictor for incident eGFR<60 mL/min/1.73 m(2) (HR 1.851, 95% CI 1.205 to 2.845, p=0.005). CONCLUSIONS: In patients with AF, an ABI ≤0.90 is independently associated with a rapid decline in renal function and incident eGFR<60 mL/min/1.73 m(2). ABI measurement may help identify patients with AF at risk of renal function deterioration

    Sex-Differences in the Pattern of Comorbidities, Functional Independence, and Mortality in Elderly Inpatients: Evidence from the RePoSI Register

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    Background: The RePoSi study has provided data on comorbidities, polypharmacy, and sex dimorphism in hospitalised elderly patients. Methods: We retrospectively analysed data collected from the 2010, 2012, 2014, and 2016 data sets of the RePoSi register. The aim of this study was to explore the sex-differences and to validate the multivariate model in the entire dataset with an expanded follow-up at 1 year. Results: Among 4714 patients, 51% were women and 49% were men. The disease distribution showed that diabetes, coronary artery disease, chronic obstructive pulmonary disease, chronic kidney disease, and malignancy were more frequent in men but that hypertension, anaemia, osteoarthritis, depression, and diverticulitis disease were more common in women. Severity and comorbidity indexes according to the Cumulative Illness Rating Scale (CIRS-s and CIRS-c) were higher in men, while cognitive impairment, mood disorders, and disability in daily life measured by the Barthel Index (BI) were worse in women. In the multivariate analysis, BI, CIRS, and malignancy significantly increased the risk of death in men at the 1-year follow-up, while age was independently associated with mortality in women. Conclusions: Our study highlighted the relevance and the validity of our previous predictive model in the identification of sex dimorphism in hospitalised elderly patients underscoring the need of sex-personalised health-care

    Management of severe paediatric malaria in resource-limited settings

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    The Role of the Endothelin System in the Vascular Dysregulation Involved in Retinitis Pigmentosa

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    Abstract Retinitis pigmentosa is a clinical and genetic group of inherited retinal disorders characterized by alterations of photoreceptors and retinal pigment epithelium leading to a progressive concentric visual field restriction, which may bring about severe central vision impairment. Haemodynamic studies in patients with retinitis pigmentosa have demonstrated ocular blood flow abnormalities both in retina-choroidal and in retroocular vascular system. Moreover, several investigations have studied the augmentation of endothelin-1 plasma levels systemically in the body and locally in the eye. This might account for vasoconstriction and ischemia, typical in vascular dysregulation syndrome, which can be considered an important factor of reduction of the ocular blood flow in subjects affected by retinitis pigmentosa

    Antiglaucoma drops influence the production of advanced glycation end-products (AGEs) in the conjunctival sac fluid of glaucoma patients

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    Glaucoma is a major cause of blindness worldwide. Glaucomatous eyes are subjected to an accelerated aging process due to an overproduction of advanced glycation end-products (AGEs) as well as its cognate receptor RAGE. Several topical antiglaucoma drugs and relative conservative molecules, including -blockers, prostaglandin derivatives and benzalkonium chloride as preservative, are frequently used in the treatment of glaucoma. However, no data focusing on the effects of topical antiglaucoma therapies on the levels of AGEs exists. Therefore, we aimed to determine whether the AGEs production in the conjunctival sac fluid was influenced by topical antiglaucoma therapies. AGEs were measured by direct spectrofluorimetric detection in the conjunctival sac fluid of glaucoma patients, treated with different topical therapies, and controls. The fluorescent intensity was expressed in AGE Units (AGE U). The levels of AGE were higher in patients treated with -blockers with respect to both control and the prostaglandin groups (for both comparisons, P<0.05). Patients treated with prostaglandin had comparable levels to the controls. None difference was observed between -blockers and -blockers in association with other drugs nor between the different kinds of prostaglandin analogues. Previously, it has been observed that prostaglandins have antioxidative properties reducing the ROS production. Since the ROS and AGEs are strictly interconnected, the effect we observed here might be due to a lower ROS production which in turn affects the levels of AGEs. In conclusion, the treatment with prostaglandins can have two positive effects: lowering of the IOP and decrease the AGEs production in the conjunctival sac
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