Heart Rate Variability During Weaning Mechanical Ventilation

Abstract

INTRODUCTION: Heart rate variability (HRV) is a noninvasive method that analyzes fluctuations of intervals between heartbeats and it is related to the influences of the autonomic nervous system during weaning. OBJECTIVE: To describe the behavior of cardiac autonomic modulation during the weaning process. METHOD: A search was conducted in PubMed. Initially 206 articles were found. After restriction search we identified 28 potentially eligible publications. RESULTS: Nine studies were included, among which eight were performed in adults and concluded that HRV during weaning becomes important because it can provide information on pathophysiological imbalances reflected in the success or failure of weaning. Only one article conducted the study in children and stated that the value of HRV as a predictor of extubation still requires further evaluation. CONCLUSION: Behavior of the cardiac autonomic modulation during the weaning process is characterized by reduced HRV and vagal withdrawal in patients with failure weaning needing to be reconnected to the mechanical ventilation support.