A utilidade da HRV como fator de prognóstico em crianças com TCE

• Autor(a) principal: Natália de Sousa Antunes
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: https://hdl.handle.net/10216/114360
• topic: Medicina clínica; Clinical medicine

Purpose Heart rate variability in children suffering from head trauma has not yet been well studied. Thus, this study aimed to assess the cardiovascular repercussions of the autonomic nervous system, through the evaluation of pediatric patients' heart rate variability (HRV), with head trauma. Methods Databases (Pubmed, World of Science and Scopus) - studies were conducted from 1996 to 2017, taking into account heart rate variability of pediatric patients (0 to 18 years), based on Task Force guidelines (1996). We analyzed ten (10) studies that included our inclusion criteria. Results The normalized total power of 0.04 to 0.15 Hz was used to quantify the heart rate low frequency(LF) and from 0.15 to 0.40 Hz to quantify heart rate high frequency (HF). An LF / HF ratio was used as a measure of sympathetic heart rate modulation. The patients with brain injury that became brain dead had a markedly lower LF / HF ratio (p <0.001), with a significant decrease after the first few hours of hospitalization. Patients with a more favorable prognosis had significantly higher LF / HF ratios. Conclusions Autonomic Nervous System (ANS) dysfunction in children suffering from brain injury leads to oscillations in heart rate variability. After reviewing the literature it was concluded that a HRV can be useful for the determination of the severity of neurological damage, that also being a prognostic factor in the evaluation of its recovery. The LF / HF ratio may prove to be useful not only for brain death after brain injury, but also for predicting which ones will have a better prognosis.