Chest pain

1. Step 1 · Cardiology

   HEART Score for Major Cardiac Events

   Undifferentiated ED chest pain — supports early discharge decisions within a validated pathway with serial troponins.

   Population

   Adult ED chest pain

   Key limitation

   Not for STEMI; subjective history/ECG items.

   Inputs

   5

   Open tool

2. Step 2 · Cardiology

   TIMI Risk Score for UA/NSTEMI

   Confirmed UA/NSTEMI — estimates short-term ischaemic risk.

   Population

   Trial patients with confirmed ACS

   Key limitation

   Weaker in undifferentiated chest pain.

   Inputs

   7

   Open tool

3. Step 3 · Cardiology

   GRACE Risk Score — In-hospital Death (ACS)

   Confirmed ACS — in-hospital mortality risk stratification.

   Population

   Hospitalised ACS patients

   Key limitation

   Registry-era absolute risks.

   Inputs

   8

   Open tool

4. Step 4 · Emergency Medicine

   Wells' Criteria for Pulmonary Embolism

   If pulmonary embolism is in the differential.

   Population

   Suspected PE

   Key limitation

   Use only when PE is being considered.

   Inputs

   7

   Open tool

The Navigator organises validated tools around a presentation. It does not recommend a diagnosis or treatment.