Mechanisms of exercise-related neurocardiogenic syncope and the relationship between resting and dynamic cardiac testing.

Objective: Syncope is common among pediatric patients and is rarely pathologic. The mechanisms for symptoms during exercise are less well understood than the resting mechanisms. Additionally, inert gas rebreathing analysis, a non-invasive examination of haemodynamics including cardiac output, has not previously been studied in youth with neurocardiogenic syncope.

Identifying Factors that Influence Pediatric Echo Lab Image Quality: Development and Validation of a New Assessment Tool.

No method of evaluating transthoracic echocardiograms (TTE) image quality (IQ) has been validated. Furthermore, structural echo lab elements impacting IQ are unknown. We sought to develop and validate a TTE IQ grading tool and determine patient and echo lab features associated with IQ.

Chronic Graft-versus-host Disease: Immune Insights, Therapeutic Advances, and Parallels for Solid Organ Transplantation.

Chronic graft-versus-host disease remains a frequent and morbid outcome of allogeneic hematopoietic cell transplantation, in which the donor-derived immune system attacks healthy recipient tissue. Preceding tissue damage mediated by chemoradiotherapy and alloreactive T cells compromise central and peripheral tolerance mechanisms, leading to aberrant donor T cell and germinal center B cell differentiation, culminating in pathogenic macrophage infiltration and differentiation in a target tissue, with ensuant fibrosis. This process results in a heterogeneous clinical syndrome with significant morbidity and mortality, frequently requiring prolonged therapy.

The Psychological Effects of Guillain-Barré Syndrome: A Grounded Theory Study.

Guillain-Barré syndrome is a rare neurological condition. Research has increased our understanding of the etiology, prognosis, and effective medical treatment of the illness. There is a lack of understanding regarding the psychological effects and what could help patients.