Prognosis

• An MI within the previous 14 days ^{a b} or angina at rest within the previous 48 h ^{a b}
• history of or current congestive heart failure ^b
• tachycardia or low blood pressure on admission ^b

Why?

Recent angina at rest or a myocardial infarction increases the risk of dying or infarction

Patient	Prognostic factor	Outcome	CER	OR  (95% CI)	NNT (95% CI)
unstable angina a	MI within last 14 days independent	death or MI   at 6 months	7.6%	5.72  (1.92 to 16.97)	4  (2 to 16)
unstable angina a	angina at rest in the previous 48 h independent	death, MI or revascularisation   at 6 months	42%	3  (2.1 to 4.3)	9  (61 to 15)