Killip Classification (Acute MI) — free guideline decision tool

Stratify acute MI by heart-failure findings with the Killip classification.

Class I (no failure) to IV (cardiogenic shock); mortality rises steeply with class. Assign Killip class I–IV from bedside exam: no failure, S3/rales, frank pulmonary oedema, or cardiogenic shock.

Early prognosis in acute myocardial infarction.

Higher Killip class marks higher short-term ACS mortality and intensifies monitoring/perfusion support. [Pending update] Some thresholds, grades and management recommendations on this page that conflict with current guidelines or are unverified are temporarily hidden pending verification against the guideline text.

Class IV (shock) carries very high mortality. Bedside assessment, no labs needed. Signals need for intensive management.

Exam findings are dynamic — reclassify after diuresis or deterioration. Does not replace SCAI shock staging when mechanical support is considered. Use with GRACE/TIMI for broader ACS risk context. For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.

Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.

Inputs: Killip class II — Rales/crackles, S3, or raised JVP → Result: Killip class II（Approx. in-hospital mortality: ~15%） Inputs: Killip class I — No clinical heart failure → Result: Killip class I（Approx. in-hospital mortality: ~5%）