Extracorporeal Cytokine Adsorption in Acute Cardiovascular Care: Pathophysiological Insights and Clinical Perspectives

<b>Background</b>: Cardiogenic shock (CS) and post-cardiac arrest syndrome (PCAS) are frequently associated with a systemic inflammatory response resulting from ischemia-reperfusion injury, endothelial dysfunction, and microcirculatory impairment. This inflammatory biology may be further amplified by temporary mechanical circulatory support (tMCS) through blood-surface interactions and shear-related hemolysis. Extracorporeal cytokine adsorption has therefore been proposed as an adjunctive strategy to attenuate hyperinflammation and facilitate shock reversal in selected patients. <b>Methods</b>: We conducted a narrative review, guided by a targeted PubMed and Scopus search and reference screening, to summarize the current pathophysiological concepts and clinical evidence on extracorporeal cytokine adsorption in CS-, PCAS-, and tMCS-supported states. <b>Results</b>: Across porous polymer hemoadsorption cartridges (e.g., CytoSorb^®), membrane-based or hybrid filters with adsorptive properties (e.g., oXiris^®), and selective approaches targeting inflammatory mediators (e.g., PentraSorb^® CRP), available studies most consistently report short-term physiological effects, including reduced vasopressor demand, improved metabolic stabilization, and modulation of inflammatory markers. However, evidence of benefits to clinically relevant endpoints remains inconsistent in various clinical settings, and randomized data are limited. <b>Conclusions</b>: Extracorporeal cytokine adsorption is a biologically plausible adjunct in inflammation-driven acute cardiovascular syndromes, but current evidence does not support routine use. Phenotype-guided patient selection, early timing, and adequately powered, mechanism-informed randomized trials are required to define clinical efficacy and safety in defined patient populations.