Abdelaal et al reported a score for predicting failure of transradial approach (TRA) for percutaneous coronary intervention (PCI). The authors are from Quebec Heart-Lung Institute and Laval University in Quebec.
Patient selection: transradial approach for primary percutaneous coronary intervention for STEMI
Parameters:
(1) age in years
(2) body weight in kilograms
(3) serum creatinine in µmol/L
(4) hypertension
(5) history of prior percutaneous coronary intervention (PCI)
(6) cardiogenic shock
(7) intra-aortic balloon pump (IABP)
(8) physician rate of transfemoral approach
(9) intubation
Parameter
Finding
Points
age in years
< 75 years
0
>= 75 years
1
weight
<= 65 kilograms
1
> 65 kilograms
0
serum creatinine
<= 133 µmol/L
0
> 133 µmol/L
1
hypertension
no
0
yes
1
prior PCI
no
0
yes
1
cardiogenic shock
no
0
yes
1
IABP
no
0
yes
1
physician rate
0 to 5%
-1
5.1 to 9.9%
0
>= 10%
1
intubation
no
0
yes
5
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: -1
• maximum score: 13 (12 stated in abstract)
Total Score
Predicted Failure
-1
0%
0
1%
1
3%
2
7%
3
13%
4
32%
5
55%
6 to 8
85-90%
>= 9
100%
Performance:
• The area under the ROC curve is 0.87.
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