Calculators · Cardiology · Classification
Killip classification
Also called Killip-Kimball class, Killip class
Bedside heart failure severity in acute myocardial infarction.
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Formula and scoring
I none; II rales/S3/raised JVP; III acute pulmonary oedema; IV cardiogenic shock or hypotension (SBP <90) with peripheral vasoconstriction (oliguria, cyanosis, sweating).
Exam and ward pearls
- Killip class II–IV is an item in the TIMI STEMI score.
- Original mortality 6 / 17 / 38 / 81% is a frequently asked number.
When not to rely on it
- Pre-thrombolytic era numbers; use them for gradient, not for current absolute risk.
Source
- Killip T, Kimball JT. Treatment of myocardial infarction in a coronary care unit. A two year experience with 250 patients. Am J Cardiol. 1967;20(4):457-64. doi:10.1016/0002-9149(67)90023-9 · PMID 6059183
- Mello BH, Oliveira GB, Ramos RF, et al. Validation of the Killip-Kimball classification and late mortality after acute myocardial infarction. Arq Bras Cardiol. 2014;103(2):107-17. doi:10.5935/abc.20140091 · PMID 25014060
Formula and cut-offs checked against these sources on 8 Nov 2026. Educational tool for clinicians; it does not replace clinical judgement.