Risk Factor	Points
Age, 90-99 yrs	6
Pre-procedure shock	5
LM CAD	5
80-89 years old	5
70-79 years old	4
Renal Disease	3
60-69 years old	3
Non-elective	2
Multi-vessel disease	2
NYHA class III or greater	2
Thrombus	2
50-59 years old	2
50-59 years old	1
Risk Score Total

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JACC August 2002, Volume 40, Issue 3 Pages 387-393

Correlates of procedural complications and a simple integer risk score for percutaneous coronary intervention Mandeep Singh, Ryan J. Lennon, David R. Holmes, Malcolm R. Bell and Charanjit S. Rihal

The outcome of interest was major complications, defined as one or more of the following: 1) in-hospital death; 2) Q-wave myocardial infarction (MI); 3) urgent or emergent coronary artery bypass graft surgery (CABG) during the index hospitalization; and 4) cerebrovascular accident. Myocardial infarction was diagnosed in the presence of two of the following three criteria: 1) chest pain for at least 20 min; 2) elevation of creatine kinase (or the MB fraction) >2 times normal; and 3) new Q waves on electrocardiography. Other procedural complications, such as non–Q-wave MI and vascular access site problems, were not included.

Estimated rates of procedural complications for the integer scoring system. The integers are proportional to the estimated continuous coefficient from the logistic model. Percentages at risk are shown for each of the five risk categories:

• ≤2% is very low risk for complications with coronary angioplasty;
• >2% to 5%, low risk;
• >5% to 10%, moderate risk;
• >10% to 25%, high risk; and
• >25%, very high risk.

NYHA = New York Heart Association classification.