Risk Score of Ambler et al for a Patient Undergoing Mitral and/or Aortic Valve Surgery

Parameter

Finding

Points

age in years

< 50 years of age

0

50 to 59 years of age

1

60 to 69 years of age

2

70 to 79 years of age

4

>= 80 years

5

gender

male

0

female

1

body mass index

>= 20 kg per square meter

0

< 20 per square meter

2

mitral and/or aortic valve surgery

aortic valve

0

mitral valve

1

mitral and aortic valve

2

concomitant tricuspid valve surgery

no

0

yes

1

concomitant CABG

no

0

yes

1

renal function

serum creatinine <= 200 µmol/L

0

serum creatinine > 200 µmol/L

3

renal dialysis

6

cardiac arrhythmia

none

0

atrial fibrillation and/or heart block

1

ventricular tachycardia or fibrillation

2

hypertension

no

0

yes

1

diabetes

no

0

yes

1

LVEF

> 50%

0

30 to 50%

1

< 30%

4

surgical priority

elective

0

urgent

2

emergency

7

previous cardiac operations

none

0

1

3

2 or more

4