Investigators used 11,640 patients in the multicentre CSWG registry to refine cardiogenic shock staging using blood pressure, lactate, and treatment intensity, examining associations with in-hospital mortality. The updated system showed progressively higher mortality across severity stages, with consistent findings in heart failure– and myocardial infarction–related shock. Compared with prior staging, 28.4% of stage D and 56.4% of stage E patients were reclassified; those reassigned to less severe stages had lower mortality. External evaluation in 1,417,637 patients also showed a graded increase in mortality across stages A–E.
The updated CSWG framework stratified in-hospital mortality in registry and external populations. These findings support its potential for severity classification, rather than demonstrating that staging-guided management improves outcomes.
Study limitation: Observational associations with mortality do not establish treatment effects; the abstract reports no discrimination or calibration estimates.
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