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. 2021 Jun 8;116(6):1174–1212. [Article in Portuguese] doi: 10.36660/abc.20210367

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Figure 6.1 — *Clinical classification of patients with advanced heart failure from the Interagency Registry for Mechanically Assisted Circulatory Support (Intermacs), see Brazilian Guidelines on Chronic and Acute Heart Failure.15 Arq Bras Cardiol. 2018; Quadro 4.6 (page 505).

**Cardiogenic shock classification proposed by the Society for Cardiovascular Angiography and Interventions (SCAI). Stage A: at risk of shock; Stage B: beginning shock; Stage C: classic shock; Stage D: deteriorating shock; Stage E: extremis. Adapted from Baran DA et al.⁵⁸Catheter Cardiovasc Interv. 2019; 94(1): 29-37.

FC: functional class; HF: heart failure; ICD: implantable cardiac defibrillator; IVAD: implantable ventricular assist device; MCSD: mechanical circulatory support device; NYHA: New York Heart Association; VA-ECMO: venoarterial extracorporeal membrane oxygenation.