Detsky Cardiac Risk Index
Risk Factor	Points
MI<6 mo	10
MI>6 mo	5
Canadian Cardiovascular Society angina
class III	10
class IV	20
Unstable Angina within past 6 mo	10
Alveolar pulmonary edema
<1 week	10
Ever	5
Critical aortic stenosis	20
Arrhythmia
Rhythm other than sinus, or pulmonary artery catheters	5
>5 premature ventricular contractions/min	5
Poor medical status	5
Age > 70 yrs	5
Emergency  operation	10
Scoring & Interpretation:	Likelihood Ratio of a Cardiac Complication*
Risk Class
Class I (0-15 pts):	0.42
Class II (16-30 pts):	3.58
Class III (>30 pts):	14.93
*Cardiac complication defined as myocardial infarction, pulmonary edema, ventricular tachycardia, ventricular fibrillation, and cardiac death.
Detsky AS, Abrams HB, McLaughlin JR, et al.  Predicting cardiac complications in patients undergoing noncardiac surgery. J. Gen Intern Med. 1986:1:211-9.