Table 1.

Example Clinical Codes Included for Stroke, Acute Coronary Syndrome and Heart Failure Diagnosis Definitions

Diagnosis	Subtype	ICD-10	ICD-9	ICPC
Acute coronary syndrome	Myocardial infarction	I21	410	K75
	Unstable angina	I20.0
	Cardiac arrest	I46
	Other acute heart disease	I24	411
Heart failure		I50	428	K77
Stroke	Subarachnoid haemorrhage	I60	430	K90
	Intracerebral haemorrhage	I61	431, 432
	Cerebral infarction	I63	433, 434
	Non-specific stroke	I64	436