Jentzer JC, van Diepen S, Barsness GW, et al. - Researchers report the application of a new 5-stage cardiogenic shock (CS) classification scheme recently proposed by the Society for Cardiovascular Angiography and Intervention (SCAI) (for the purpose of risk stratification) in a cardiac intensive care unit (CICU) population. They examined Mayo Clinic CICU patients admitted between 2007 and 2015, via a retrospective analysis. They used CICU admission data depending on the presence of hypotension or tachycardia, hypoperfusion, deterioration, and refractory shock, to retrospectively classify SCAI CS stages A through E. They stratified hospital mortality in each SCAI shock stage by cardiac arrest (CA). Findings revealed that robust hospital mortality risk stratification was achieved using SCAI CS classification, including the presence or absence of CA, when evaluated at the time of CICU admission. For the identification, communication, and prediction of the risk of mortality in patients with, and at risk for, CS, the implementation of this classification system could be done as a clinical and research tool.