Optimization of Venoarterial Extracorporeal Membrane Oxygenation Weaning: Hemodynamic Targets, Predictive Indicators, and Future Algorithm

Venoarterial extracorporeal membrane oxygenation (VA-ECMO) is a life-saving intervention for patients with refractory cardiogenic shock or cardiac arrest. However, weaning from VA-ECMO remains challenging and significantly affects patient prognosis. This systematic review examined the multifactorial determinants underlying successful VA-ECMO weaning, highlighting the critical need for integrated evaluation of biventricular function, hemodynamic stability, and microcirculatory perfusion. Key predictive parameters encompass both macrocirculatory indices (including left and right ventricular performance) and metabolic parameters, all of which collectively inform evidence-based weaning decisions. Advanced imaging techniques and multidimensional assessment tools have emerged as promising strategies for optimizing weaning protocols. Pharmacological strategies and precise volume optimization are important for improving weaning success. However, gaps in standardized weaning protocols and bridging therapy algorithms highlight critical, unmet needs. Thus, future efforts should focus on developing dynamic predictive models that incorporate real-time hemodynamic data and on the clinical implementation of microcirculatory assessment technologies.