HEART score is the sum of five domains, each scored 0, 1 or 2 points. Total range is 0–10 points.

Component	0 points	1 point	2 points
History	Slightly or non-suspicious	Moderately suspicious	Highly suspicious
ECG	Normal	Non-specific repolarisation disturbance	Significant ST deviation
Age	<45 years	45–64 years	≥65 years
Risk factors	None known	1–2 risk factors	≥3 risk factors or known atherosclerotic disease
Troponin	≤ normal limit	1–3× normal limit	More than 3× normal limit

Risk bands used in this calculator:

HEART Score for Major Cardiac Events