Table 3.

Braunwald Classification of Unstable Angina (according to [17])

Class	Severity
I	New onset of severe angina or accelerated angina; no rest pain
II	Angina at rest within past month but not within preceding 48 h (angina at rest, subacute)
III	Angina at rest within 48 h (angina at rest, acute)
	Clinical circumstances
A	Develops in Presence of Extracardiac Condition That Intensifies Myocardial Ischemia (Secondary UA)
B	Develops in absence of extracardiac conditions (Primary UA)
C	Develops within 2 weeks of AMI (Postinfarction UA)