The Right Ventricle and Exercise Capacity in Adults with Repaired Tetralogy of Fallot: Passive Bystander or Active Participant?

Exercise intolerance is a hallmark symptom in adults with repaired tetralogy of Fallot (TOF). This may be attributed to the disease-related impairment in RV systolic function, augmentation in right ventricular (RV) load, and their combined effect on altering left ventricular (LV) hemodynamics. To further elucidate these mechanisms, we examined oxygen uptake (VO) by indirect-calorimetry and cardiac hemodynamics by echocardiography in 34 TOF (48 ± 14 yrs) and 29 healthy controls (41 ± 15 yrs), at rest and during exercise.

Galvanic hydrogenation reaction in metal oxide.

Rational reforming of metal oxide has a potential importance to modulate their inherent properties toward appealing characteristics for various applications. Here, we present a detailed fundamental study of the proton migration phenomena between mediums and propose the methodology for controllable metal oxide hydrogenation through galvanic reactions with metallic cation under ambient atmosphere. As a proof of concept for hydrogenation, we study the role of proton adoption on the structural properties of molybdenum trioxide, as a representative, and its impact on redox characteristics in Li-ion battery (LiB) systems using electrochemical experiments and first-principles calculation.

Yellow fever in Ghana: Predicting emergence and ecology from historical outbreaks.

Understanding the epidemiology and ecology of yellow fever in endemic regions is critical for preventing future outbreaks. Ghana is a high-risk country for yellow fever. In this study we estimate the disease burden, ecological cycles, and areas at risk for yellow fever in Ghana based on historical outbreaks.

Sex, vaccination status, and comorbidities influence long COVID persistence.

Background: There is interest in the public health impact of Long COVID, defined as symptoms that persist or begin after SARS-CoV-2 infection. We aimed to identify demographic and clinical risk factors associated with Long COVID over time in an Upper Middle-Income Country (UMIC) and potential biomarkers predictive of symptom trajectory.

Methods: Prospective cohort study of adults with mild SARS-COV-2 during the Omicron period.

Perinatal and Neonatal Chikungunya Virus Transmission: A Case Series.

Background: Large-scale epidemics in countries with high birth rates can create a concerning scenario where pregnant people are more likely to transmit the virus. In addition, increased international mobility has made arboviruses a growing problem for travelers. The increased risk of vertical transmission has been related to maternal viremia near delivery.