Lauer et al evaluated men with suspected coronary artery disease and normal electrocardiograms (ECG). They identified factors associated with long-term survival following an exercise treadmill test. The authors are from the National Heart, Lung and Blood Institute at NIH, the Cleveland Clinic and Kaiser Permanente in Denver.
Parameters:
(1) age in years (over range of 30 to 95)
(2) gender
(3) typical angina
(4) diabetes
(5) current or recent cigarette smoking
(6) hypertension (resting systolic > 140 mm Hg, resting diastolic > 90 mm Hg)
(7) ratio of achieved to predicted METs during the exercise testing
(8) ST segment depression in mm during exercise testing
(9) test-induced angina
(10) heart rate recovery
(11) frequent ventricular ectopy during recovery
points for age =
= (1.53846 * (age)) - 46.154
points for ST segment depression =
= (mm depression) * 0.6
|
Ratio in METS |
Points |
|
< 0.2 |
66 |
|
0.2 to 2.4 |
7.702 * ((ratio)^2)) - (48.94 * (ratio)) + 74.43 |
|
> 2.4 |
0 |
|
Parameter |
Finding |
Points |
|
gender |
female |
0 |
|
|
male |
10 |
|
typical angina |
no |
0 |
|
|
yes |
6 |
|
diabetes |
none |
0 |
|
|
not insulin treated |
3.6 |
|
|
insulin treated |
8.3 |
|
current or recent smoking |
no |
0 |
|
|
yes |
10 |
|
hypertension |
no |
0.9 |
|
|
yes |
0 |
|
test-induced angina |
no |
6 |
|
|
yes |
0 |
|
heart rate recovery |
normal |
0 |
|
|
abnormal |
6.3 |
|
frequent ventricular ectopy |
no |
0 |
|
|
yes |
3.9 |
total score =
= SUM(points for all 11 parameters)
Interpretation:
• minimum score: 0
• maximum score: > 180
• The higher the score the worse the long-term survival.
|
Total Score |
Probability of 5 Year Survival |
|
0 to 75.9 |
> 99% |
|
76 to 104 |
(-0.14286 * (points)) + 109.86 |
|
104 to 165 |
(-0.01691 * ((points)^2)) + (3.3 * (points)) - 65.08 |
|
> 165 |
< 20% |
Specialty: Cardiology, Sports Medicine & Rehabilitation
ICD-10: ,
