Braunwald Classification of Unstable Angina 

Updated: Jun 13, 2014
  • Author: Buck Christensen; more...
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Braunwald Classification of Unstable Angina

Table 1. Braunwald Classification of Unstable Angina [1]

 

Table. (Open Table in a new window)

Clinical Circumstances of Development

Severity

 

 

I

II

III

 

 

Newly onset severe or accelerated angina; no pain at rest

Angina in a resting state within preceding month but not within past 48 hours (angina at rest, subacute)

Angina in a resting state within the preceding 48 hours (angina at rest, acute)

A

Develops in presence of extracardiac condition that intensifies myocardial ischemia (secondary unstable angina)

IA

IB

IC

B

Develops in the absence of extracardiac condition (primary unstable angina)

IIA

IIB

IIC

C

Develops within 2 weeks following acute myocardial infarction (postinfarction unstable angina)

IIIA

IIIB*

IIIC

*Class IIB is further subclassified depending on the troponin status of the patient; see Table 2.

Table 2. Risk of Death and Myocardial Infarction in Class IIIB Unstable Angina (Open Table in a new window)

Troponin Status

Risk of Death and Myocardial Infarction

 

24 hours

30 days

6 months

Positive

5%

15-20%

25%

Negative

< 1%

< 2%

< 5%