Clinically Asymptomatic Sleep-Disordered Breathing in Infants with Single-Ventricle Physiology

Smooth muscle Cxcl12 activation is associated with vascular remodeling in flow-induced pulmonary hypertension

Patients with congenital heart disease (CHD) resulting in significant left-to-right shunting of blood are at risk for the development of pulmonary arterial hypertension (PAH). The underlying mechanism by which pulmonary overcirculation and shear stress lead to vascular remodeling remains unclear. Our study established a new "two-hit" murine model of severe pulmonary hypertension (PH) by combining left pneumonectomy and exposure to hypoxia (LP/Hx). Utilizing transgenic reporter lines, immunofluorescence staining, and advanced microscopy, we conducted cell-lineage tracing experiments for endothelial cells (ECs), smooth muscle cells (SMCs), and pericytes. We identified that SMCs is a primary contributor to distal arteriolar remodeling after LP/Hx. Subsequent qPCR analysis on isolated cells demonstrated that Cxcl12 was upregulated in both ECs and SMCs from LP/Hx animals. Likewise, CXCL12 was overexpressed in the SMC layer of arterioles in patients with acyanotic PAH-CHD. These findings provide novel insights into the contribution of SMCs and Cxcl12 to pulmonary flow-induced vascular remodeling. This newly established murine model of PH will serve as a new tool for research and targeted therapeutics for patients with PAH.

Obstructive Sleep Apnea and Short-Term Outcomes After Pediatric Cardiac Surgery

Obstructive sleep apnea (OSA) has been associated with negative cardiovascular effects and negative outcomes following cardiovascular surgery in the adult population. Our objective was to evaluate if there is a similar association in children. Single center retrospective matched cohort study, we collected data on patients aged 1-18 who were admitted to the cardiac intensive care unit (CICU) between Jan 2012 and Dec 2021. We used a 3:1 propensity score matching for cases not diagnosed with OSA. Primary outcome was a composite variable: "adverse outcome," consisting of prolonged hospital and CICU stay, prolonged duration of mechanical ventilation, need for extracorporeal membrane oxygenation, and death. The study comprised 80 patients diagnosed with OSA and 240 patients without a diagnosis of OSA before cardiac surgery. The median age was 5.3 years (IQR 2.7-11.2). There were 184 (57.5%) males, and 102 (31.9%) had chromosomal and genetic abnormalities. There was a difference in "adverse outcome" between the OSA and non-OSA groups [34 (42.50%) vs 68 (28.33%), p = 0.027]. Moreover, bivariate analysis revealed that CICU length of stay, and chromosomal anomalies were statistically different between the groups. By logistic regression the composite variable "adverse outcome" remained associated to the OSA group (p = 0.009) with an adjusted odds ratio (OR) of 4.09 (1.83-9.18), p < 0.001. Children diagnosed with OSA had a higher risk of "adverse outcome" following cardiac surgery. The risk disappeared if the patient had Tonsillectomy and Adenoidectomy before cardiac surgery. Further studies should explore a proactive treatment for OSA in pediatric patients who need cardiac surgery.

Teoria de Médio Alcance do Padrão Respiratório Ineficaz em Crianças com Cardiopatia Congênita

Resumo Objetivo: desenvolver e avaliar uma teoria de médio alcance para o Diagnóstico de Enfermagem de Padrão Respiratório Ineficaz em crianças com cardiopatia congênita. Método: um estudo metodológico realizado em duas etapas: 1) desenvolvimento de uma teoria de médio alcance para padrão respiratório ineficaz em crianças com doenças cardíacas congênitas a partir da análise da taxonomia NANDA-Internacional, modelo de adaptação de Callista Roy e uma revisão da literatura; e 2) avaliação da teoria de médio alcance desenvolvida por meio da avaliação de painéis de especialistas. Resultados: após três avaliações de painéis, a versão final da teoria de médio alcance resultou em quatro metaparadigmas, dois conceitos-chave, dois diagramas pictóricos, duas propostas e uma descrição das inter-relações entre os conceitos-chave do Padrão Respiratório Ineficaz em crianças com cardiopatias congênitas e evidências para a prática de Enfermagem. Conclusão: a teoria do médio alcance desenvolvida e avaliada por especialistas identificou estímulos e comportamentos que podem auxiliar os enfermeiros na identificação das razões pelas quais o Padrão Respiratório Ineficaz é diagnosticado e como ele se manifesta em crianças com cardiopatia congênita, aumentando a compreensão das relações entre as causas e sua temporalidade.

Middle-Range Theory of Ineffective Breathing Pattern in children with Congenital Heart Disease

OBJECTIVE

to develop and evaluate a middle-range theory for the Nursing Diagnosis of Ineffective Breathing Pattern in children with congenital heart disease.

METHOD

a methodological study carried out in two stages: 1) development of a middle- range theory for Ineffective Breathing Pattern in children with congenital heart diseases from the analysis of the NANDA-International taxonomy, Callista Roy's Adaptation Model and a literature review; and 2) assessment of the middle-range theory developed using expert panel evaluation.

RESULTS

after three panel evaluations, the final version of the middle-range theory resulted in four metaparadigms, two key concepts, two pictorial diagrams, two propositions and a description of the interrelationships between the key concepts of Ineffective Breathing Pattern in children with congenital heart diseases and evidence for the Nursing practice.

CONCLUSION

the middle-range theory developed and evaluated by experts identified stimuli and behaviors that can assist nurses in identifying the reasons why Ineffective Breathing Pattern is diagnosed and how it manifests itself in children with congenital heart disease, increasing understanding of the relationships between the causes and their temporality.

Teoría de Mediano Alcance del Patrón de Respiración Ineficiente en niños con cardiopatías congénitas

Resumen Objetivo: desarrollar y evaluar una teoría de mediano alcance para el Diagnóstico de Enfermería “Patrón de Respiración Ineficiente” en niños con cardiopatías congénitas. Método: estudio metodológico desarrollado en dos etapas: 1) Desarrollo de una teoría de mediano alcance para el Patrón de Respiración Ineficiente en niños con cardiopatías congénitas a partir del análisis de la taxonomía NANDA-Internacional, del Modelo de Adaptación de Callista Roy y de una revisión de la literatura; y 2) Evaluación de la teoría de mediano alcance desarrollada por medio de una evaluación de un panel de expertos. Resultados: después de tres evaluaciones a cargo del panel, la versión final de la teoría de mediano alcance derivó en cuatro metaparadigmas, dos conceptos clave, dos pictogramas, dos propuestas y una descripción de las interrelaciones entre los conceptos clave del Patrón de Respiración Ineficiente en niños con cardiopatías congénitas y evidencia para la práctica de Enfermería. Conclusión: la teoría de mediano alcance desarrollada y evaluada por expertos identificó estímulos y comportamientos que pueden ayudar a los enfermeros a identificar los motivos por los cuales se diagnostica el Patrón de Respiración Ineficiente y cómo se manifiesta en niños con cardiopatías congénitas, mejorando así la comprensión de las relaciones entre las causas y su temporalidad.

Sleep-Disordered Breathing and Cardiovascular Disease in Children and Adolescents: A Scientific Statement From the American Heart Association

Obstructive sleep apnea (OSA) is a known risk factor for cardiovascular disease in adults. It is associated with incident systemic hypertension, arrhythmia, stroke, coronary artery disease, and heart failure. OSA is common in children and adolescents, but there has been less focus on OSA as a primary risk factor for cardiovascular disease in children and adolescents. This scientific statement summarizes what is known regarding the impact of sleep‐disordered breathing and, in particular, OSA on the cardiovascular health of children and adolescents. This statement highlights what is known regarding the impact of OSA on the risk for hypertension, arrhythmia, abnormal ventricular morphology, impaired ventricular contractility, and elevated right heart pressure among children and adolescents. This scientific statement also summarizes current best practices for the diagnosis and evaluation of cardiovascular disease–related complications of OSA in children and adolescents with sleep apnea and highlights potential future research in the area of sleep‐disordered breathing and cardiovascular health during childhood and adolescence.