A classification has been proposed by Braunwald to facilitate the assignation of patients to a particular risk group. This classification takes into account the severity of symptoms, the clinical circumstances surrounding the anginal episode, and the intensity of treatment.
|
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:
- Hamm CW, Braunwald E. A classification of unstable angina revisited. Circulation. 2000 Jul 4;102(1):118-22. [Medline]
- Braunwald E. Unstable angina. A classification. Circulation. 1989 Aug;80(2):410-4. [Medline]
Created: Aug 08, 2005
