Table 1.

Criteria for SCAI stages

SCAI stage	Criteria
B	Hypotension (SBP 60–90 mmHg or MAP 50–65 mmHg) OR hypoperfusion (lactate 2–5 mmol/l or ALT 200–500 U/l) + no drug/device therapy
C	Hypotension AND hypoperfusion (same cutoffs) + no drug/device therapy 1 drug OR 1 device therapy without hypotension or hypoperfusion
D	Hypotension (same cutoffs) AND worsened hypoperfusion (lactate 5–10 mmol/l or ALT > 500 U/l) 2–5 drugs/devices therapies 1 drug or 1 device therapy with persistent hypotension or hypoperfusion
E	Hypotension (SBP < 60 mmHg or MAP < 50 mmHg) Hypoperfusion (lactate > 10 mmol/l or pH ≤ 7.2)  > 3 drug or > 3 device therapies OHCA

OHCA out-of-hospital cardiac arrest, ALT alanine transaminase SBP systolic blood pressure, MAP mean arterial pressure (MAP)