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| Algorithm for risk stratification and treatment of patients with UA/NSTEMI. DM= diabetes mellitus; Rx = treatment. Updated with permission from Braunwald E, Zipes DP, Libby P, eds. Heart Disease: A Textbook of Cardiovascular Medicine. 6th ed. Philadelphia, Pa: W.B. Saunders; 2001:1232–1263.[Source] |
Severity
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Clinical Circumstances
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A
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B
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C
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Develops in presence of extracardiac condition that intensifies myocardial ischemia (secondary UA)
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Develops in the absence of extracardiac condition (primary UA)
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Develops within 2 weeks after acute myocardial infarction (postinfarction UA)
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I
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New onset of severe angina or accelerated angina; no rest pain
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IA
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IB
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IC
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II
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Angina at rest within past month but not within preceding 48 hr (angina at rest, subacute)
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IIA
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IIB
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IIC
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III
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Angina at rest within 48 hr (angina at rest, acute)
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IIIA
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IIIB Troponin negative
IIIB Troponin positive
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IIIC
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