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• W3210279871 abstract "Fluid boluses are amongst the strongest recommendations for the management of septic patients, and they are generally administered with the goal increasing cardiac output and improving tissue perfusion. Early identification of volume responsiveness is challenging and dependent on many patient factors, but it may prevent the harmful consequences of hypervolemia. Left ventricular outflow tract (LVOT) velocity time integral (VTI) has been used as a predictor of volume responsiveness. The purpose of this study was to determine whether lack of volume responsiveness, defined as ≤15% change in LVOT VTI, is associated with increased risk of mortality, admission to an intensive care unit (ICU), or rapid response team activation within 24 hours of hospital arrival (composite outcome measure). We hypothesize that septic patients who are not volume responders will be more critically ill and therefore at greater risk of experiencing the composite outcome. This is a prospective observation study of septic patients conducted in an academic emergency department (ED). Patients were eligible for enrollment if they met Sepsis 3 definition and were receiving intravenous fluids. Patients received a point-of-care echocardiogram to measure LVOT VTI. Three measurements were taken and the average was recorded. After patients received a 500mL fluid bolus, a repeat ultrasound was conducted to re-measure VTI. Volume responsiveness was defined as >15% increase in VTI. Chart review was performed on all enrolled patients to determine whether the composite outcome occurred within 24 hours of ED arrival. At total of 126 patients with repeat ultrasound exams were included in this analysis; 49.2% were female and median age was 74 years. Overall, 56 (44.4%) patients experienced the composite primary outcome within 24 hours, and 30 (23.8%) patients had a delta VTI of >15%. Among the patients who experienced the composite outcome, 82.1% of them had a delta VTI of ≤15%, compared with 71.4% of patients who did not experience the composite outcome (p-value = 0.160). In a multivariable logistic regression modeling adjusting for lactate and systolic blood pressure, delta VTI of ≤15%, compared with delta VTI >15%, was significantly associated with higher odds of mortality, ICU admission, or rapid response team activation within 24 hours (OR: 2.643; 95% CI: 1.002, 6.967). Septic ED patients who are not volume responsive, based on percent change in VTI, are more likely to experience mortality, be admitted to an ICU, or have a rapid response team activation within 24 hours of ED arrival. Our findings suggest that early VTI may be used in septic patients to predict their clinical course. Future endeavors may evaluate if initial change in VTI could be used to help emergency physicians identify this critically ill cohort and facilitate earlier ICU disposition and vasopressor administration." @default.
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• W3210279871 date "2021-10-01" @default.
• W3210279871 modified "2023-10-16" @default.
• W3210279871 title "304 Lack of Early Left Ventricular Outflow Tract Velocity Time Integral Estimated Volume Responsiveness is Associated With Increased Morbidity and Mortality" @default.
• W3210279871 doi "https://doi.org/10.1016/j.annemergmed.2021.09.318" @default.
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