Therapy

Look for

• aortic valve disease ^a
• shock ^a
• acute myocardial infarction within 24 hours of coronary angioplasty ^a
• unstable angina ^{a b}
• complex lesion on coronary angioplasty ^{a b}
• left main coronary artery lesions ^a
• multivessel disease ^{a b}

Risk of angioplasty complications

Risk factors a	risk of major complications
>3	very high
3	high
1 to 2	moderate
0	low

A clinical prediction rule can help identify patients at risk for angioplasty complications

Risk factors for major complications	% (95% CI)	NNF (95% CI)
>3	17% (5.4% to 28%)	6 (4 to 19)
3	5.4% (2.2% to 8.7%)	18 (11 to 46)
1 to 2	2.5% (1.9% to 3.1%)	40 (33 to 52)
0	1.3% (0.82% to 1.8%)	76 (55 to 120)