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  • Title: Mitral Annular Plane Systolic Excursion as a Predictor of Mortality in Children With Septic Shock.
    Author: El-Zayat RS, Shalaby AG.
    Journal: Pediatr Crit Care Med; 2018 Sep; 19(9):e486-e494. PubMed ID: 30024571.
    Abstract:
    OBJECTIVES: Myocardial dysfunction is well recognized in severe sepsis and septic shock. Echocardiography provides rapid, noninvasive, and bedside evaluation of cardiac function in patients with hemodynamic instability. Mitral annular plane systolic excursion is an M-mode-derived echocardiographic variable used to assess longitudinal left ventricular systolic function. No data are available about the uses of mitral annular plane systolic excursion in children with septic shock. Therefore, we aimed to assess the prognostic significance of mitral annular plane systolic excursion in children with septic shock and to correlate it with the most commonly used measures of left ventricular systolic function and myocardial injury. DESIGN: A prospective cohort study. SETTING: The study carried out at the PICU of Menoufia University Hospital in the period from March 2015 to September 2016. PATIENTS: We serially enrolled 50 children with septic shock. INTERVENTIONS: Complete diagnostic workup was performed for each patient including calculation of Pediatric Risk of Mortality III score. Transthoracic echocardiography was done to obtain mitral annular plane systolic excursion and the left ventricular ejection fraction measurement within 24 hours of inclusion then repeated on third and fifth days. Patients were followed up until hospital discharge or death. The predictive power of mitral annular plane systolic excursion was determined using the receiver operating characteristic curve. MEASUREMENTS AND MAIN RESULTS: Mitral annular plane systolic excursion was significantly lower in nonsurvivors compared with survivors (p < 0.001). Receiver operating characteristic curve analysis showed an area under the curve of 0.892 for mitral annular plane systolic excursion on day 1. The cut-off point was 7.9 mm with 82.76% sensitivity and 80.95% specificity. Furthermore, follow-up of the patient's systolic function showed that mitral annular plane systolic excursion was significantly lower in nonsurvivors compared with survivors on days of follow-up, whereas left ventricular ejection fraction was not significantly different between survivors and nonsurvivors at any day. Mitral annular plane systolic excursion was positively correlated with left ventricular ejection fraction (p = 0.044) and duration of hospital stay (p < 0.001) and negatively correlated with Pediatric Risk of Mortality III score (p < 0.001) and cardiac troponin I level (p < 0.001). CONCLUSIONS: Measurement of mitral annular plane systolic excursion at admission added a prognostic value in septic shock children. Compared with the left ventricular ejection fraction, longitudinal systolic function might be more sensitive in the detection of myocardial dysfunction in critically ill children and should receive more attention.
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