Based on gender and data collected during exercise testing, it is possible to predict the risk (low, intermediate, or high probability) of left main or triplevessel coronary artery disease in a patient.
Variables:
(1) gender (male or female)
(2) distance of exerciseinduced STsegment depression ( < 1 mm, 1 mm, 2 mm)
(3) exercise ejection fraction (from 0.30 to 0.80)
(4) exercise ((heart rate) • (systolic blood pressure)) product (from 10,000 to 30,000)
Lines separate probability zones for left main or triplevessel coronary artery disease:
(1) low probability
(2) intermediate probability
(3) high probability
Women with exerciseinduced ST depression of < 1 mm

X in 1000s 
Y 

lower line, y or left intercept 
10 
0.43 
lower line, x or right intercept 
13.2 
0.3 
upper line, y or left intercept 
10.8 
0.8 
upper line, x or right intercept 
22.4 
0.3 

slope 
intercept 

lower line (high vs intermediate probability) 
0.042 
0.848 
upper line (intermediate vs low probability) 
0.043 
1.268 
Women with exerciseinduced ST depression of 1 mm

X in 1000s 
Y 

lower line, y or left intercept 
10 
0.71 
lower line, x or right intercept 
19.9 
0.30 
upper line, y or left intercept 
17.0 
0.80 
upper line, x or right intercept 
28.6 
0.30 

slope 
intercept 

lower line (high vs intermediate probability) 
0.041 
1.116 
upper line (intermediate vs low probability) 
0.043 
1.529 
Women with exerciseinduced ST depression of 2 mm

X in 1000s 
Y 

lower line, y or left intercept 
14 
0.80 
lower line, x or right intercept 
25.4 
0.30 
upper line, y or left intercept 
23.2 
0.80 
upper line, x or right intercept 
30 
0.518 

slope 
intercept 

lower line (high vs intermediate probability) 
0.044 
1.414 
upper line (intermediate vs low probability) 
0.041 
1.761 
Men with exerciseinduced ST depression of < 1 mm

X in 1000s 
Y 

lower line, y or left intercept 
10 
0.62 
lower line, x or right intercept 
17.6 
0.30 
upper line, y or left intercept 
15 
0.80 
upper line, x or right intercept 
26.7 
0.30 

slope 
intercept 

lower line (high vs intermediate probability) 
0.042 
1.048 
upper line (intermediate vs low probability) 
0.043 
1.442 
Men with exerciseinduced ST depression of 1 mm

X in 1000s 
Y 

lower line, y or left intercept 
12.07 
0.80 
lower line, x or right intercept 
23.9 
0.30 
upper line, y or left intercept 
21.2 
0.80 
upper line, x or right intercept 
30 
0.453 

slope 
intercept 

lower line (high vs intermediate probability) 
0.042 
1.309 
upper line (intermediate vs low probability) 
0.039 
1.634 
Men with exerciseinduced ST depression of 2 mm

X in 1000s 
Y 

lower line, y or left intercept 
18.22 
0.80 
lower line, x or right intercept 
30 
0.324 
upper line, y or left intercept 
27.3 
0.80 
upper line, x or right intercept 
30 
0.70 

slope 
intercept 

lower line (high vs intermediate probability) 
0.040 
1.537 
upper line (intermediate vs low probability) 
0.036 
1.795 
Specialty: Cardiology
ICD10: ,