Acronym: CRRAC
Patient selection: percutaneous balloon aortic valvuloplasty
Outcome: 30-day mortality
Parameters:
(1) critical status (C)
(2) renal dysfunction (R) based on serum creatinine in mg/dL
(3) pre-procedural right atrial pressure in mm Hg (RA)
(4) cardiac output (C)
Critical status - one or more of the following:
(1) ventricular tachycardia or fibrillation
(2) aborted sudden death
(3) preoperative ventilation
(4) preoperative inotropic support
(5) intra-aortic couterpulsation
(6) preoperative anuria or oliguria
|
Parameter
|
Finding
|
Points
|
|
critical status
|
absent
|
0
|
|
|
present
|
17
|
|
serum creatinine
|
<= 2.26 mg/dL
|
0
|
|
|
> 2.26 mg/dL
|
15
|
|
right atrial pressure
|
|
|
|
cardiac output
|
> 4.1 L/min
|
0
|
|
|
<= 4.1 L/min
|
7
|
total score =
= SUM(points for all 4 parameters)
Interpretation:
• minimum score: 0
• maximum score: > 50 (depending on right atrial pressure)
• A score >= 20 is associated with an increased risk for mortality.
|
Score
|
Tertile
|
Mortality Rate
|
|
0 to 10
|
lowest
|
6.5%
|
|
11 to 19
|
middle
|
5.3%
|
|
>= 20
|
highest
|
26%
|
Performance:
• The area under the ROC curve is 0.75.
