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Braunwald Classification of Unstable Angina (UA)

 

 

Severity

Clinical Circumstances

A

B

C

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

Develops in the absence of extracardiac condition (primary UA)

Develops within 2 weeks after acute myocardial infarction (postinfarction UA)

I

New onset of severe angina or accelerated angina; no rest pain

IA

IB

IC

II

Angina at rest within past month but not within preceding 48 hr (angina at rest, subacute)

IIA

IIB

IIC

III

Angina at rest within 48 hr (angina at rest, acute)

IIIA

IIIB Troponin negative

IIIB Troponin positive

IIIC

hr, hours; IAM, myocardial infarction; UA, unstable angina.

 

References:

  1. Hamm CW, Braunwald E. A classification of unstable angina revisited. Circulation. 2000 Jul 4;102(1):118-22. [Medline]
  2. Braunwald E. Unstable angina. A classification. Circulation. 1989 Aug;80(2):410-4. [Medline]

 

Created: August 08, 2005
Last Modified: 03/04/2006