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%