|
Functional
Class |
Definition |
VO2
max (ml/min/kg) |
AT
(ml/min/kg) |
|
A |
No cardiac failure |
>20 |
>14 |
|
B |
Mild cardiac failure |
16-19.9 |
11-13.9 |
|
C |
Moderate cardiac failure |
10-15.9 |
8-10.9 |
|
D |
Severe cardiac failure |
<10 |
<8 |
Table
2 Code and Definitions for
Grading of Peri-operative Risk
|
Degree
of cardiac failure as VO2 ml/min/kg at AT |
Expected
postoperative VO2 (ml/min/M2) |
Organ
system dysfunction |
|
|
A = > 14 |
1 = VO2
< 120 |
P = Ve/VO2
> 35 |
p = 28 < Ve/VO2
< 35 |
|
B = 11 - 13.9 |
2 = 120 < VO2
< 150 |
A = SVT |
a = other arrhythmia |
|
C = 8 - 10.9 |
3 = VO2
> 150 |
I = ischaemia before AT |
i = ischaemia
at/after AT |
|
D = < 8 |
|
|
|
‘P’ or ‘p’
denotes degree of pulmonary dysfunction
‘A’ or ‘a’
denotes type of cardiac arrhythmia
‘I’ or ‘i’
denotes onset of myocardial ischaemia