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Functional classification of patients with heart failure
Functional classification of patients with heart failure
Class
Severity
VO
2
max, mL/kg/min
Anaerobic threshold, mL/kg/min
Maximal cardiac index, L/min/m
2
A
None to mild
>20
>14
>8
B
Mild to moderate
16-20
11-14
6-8
C
Moderate to severe
10-15
8-11
4-6
D
Severe
6-9
5-8
2-4
E
Very severe
<6
3-4
<2
Data from: Weber KT, Janicki JS. CardioPulmonary Exercise Testing. Physiologic Principles and Clinical Applications. WB Saunders, Philadelphia, 1986.
Graphic 82568 Version 4.0
