Cooperman et al developed an equation for predicting the risk of cardiovascular complications following major vascular surgery in patients with peripheral vascular disease.
Parameters used for equation:
(1) angina
(2) congestive heart failure
(3) arrhythmia
(4) myocardial infarction
(5) cerebrovascular accident
(6) abnormal electrocardiogram (ECG)
Parameter |
Finding |
Points |
angina |
no |
0 |
|
yes |
1 |
congestive heart failure |
no |
0 |
|
yes |
1 |
arrhythmia |
no |
0 |
|
yes |
1 |
myocardial infarction |
no |
0 |
|
yes |
1 |
cerebrovascular accident |
no |
0 |
|
yes |
1 |
abnormal electrocardiogram |
no |
0 |
|
yes |
1 |
X =
= (0.46 * (points for angina)) + (1.02 * (points for congestive heart failure)) + (0.62 * (points for arrhythmia)) + (0.64 * (points for myocardial infarction)) + (1.15 * (points for cerebrovascular accident)) + (1.25 * (points for abnormal electrocardiogram)) – 3.81
In the original paper, this is used as:
probability of cardiovascular complications =
= EXP(X)
However, it probably should be used as:
probability of cardiovascular complications =
= 1 / (1 + EXP((-1) * X))
Limitations:
• The score was developed in 1978.
Purpose: To evaluate a person with peripheral vascular disease for cardiovascular risk prior to vascular surgery using the score of Cooperman et al.
Specialty: Cardiology, Surgery, general
Objective: risk factors, severity, prognosis, stage
ICD-10: I73,