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Prevalence Clinical features Differential diagnosis Investigations Therapy Prevention Prognosis

Prognosis Patients are at increased risk of dying, having an MI or requiring revascularisation with: requirement for iv nitrates on admission a b not on a beta-blocker or rate-lowering calcium-channel blocker a b maximal antianginal therapy b Patient Prognostic factor Outcome CER OR  (95% CI) NNT (95% CI) unstable angina a Requiring iv nitrates independent Death or MI  at 6 months 42% 2.1  (1.5 to 3.1) 15  (8 to 31) unstable angina a No beta-blocker or rate-lowering calcium-channel blocker  independent Death or MI  at 6 months 7.6% 3.83  (1.55 to 9.42) 6  (3 to 27)

Expiry date: June 2003
Levels of Evidence used in grading these guides