Killip Classification

How to use it

1. 1

   Auscultate lung bases. Bibasal crackles = Class II. Crackles >50% fields = Class III.

2. 2

   Assess haemodynamics. SBP <90 with peripheral shut-down = Class IV (cardiogenic shock).

3. 3

   Classify on admission. Used as a prognostic tool; also feeds into GRACE/TIMI scores.

When to use it

ACS triage and risk stratification

Class III–IV require urgent haemodynamic support, CCU admission, mechanical ventilation assessment.

Input to other scores

Killip class is a parameter in GRACE and TIMI STEMI scores.

In-hospital mortality prediction

Class IV mortality >80% without intervention; identifies patients for early IABP/Impella/ECMO discussion.