The Heart Failure Survival Score (HFSS) can be used to predict the 1 year mortality risk in patients with severe congestive heart failure. This can help in decision making for patients referred for cardiac transplantation.
Two multivariate models developed:
(1) noninvasive: 7 parameters
(2) invasive (noninvasive parameters + mean pulmonary capillary wedge pressure)
|
Parameter for Models |
Value |
|---|---|
|
ischemic cardiomyopathy |
value 0 if absent, 1 if present |
|
resting heart rate |
beats per minute |
|
left ventricular ejection fraction |
percent ( from 0 to 100) |
|
mean blood pressure |
mm Hg |
|
intraventricular conduction defect |
value 0 if absent, 1 if present |
|
peak oxygen consumption |
mL oxygen per kilogram per minute |
|
serum sodium |
mmol/L |
|
mean pulmonary capillary wedge pressure (PCWP), invasive model only |
pressure in mm Hg |
where:
• mean arterial pressure = ((systolic pressure) + (2 * (diastolic pressure))) / 3
|
Coefficients |
noninvasive |
invasive |
|---|---|---|
|
ischemic cardiomyopathy |
0.6931 |
0.5654 |
|
resting heart rate |
0.0216 |
0.0218 |
|
left ventricular ejection fraction |
-0.0464 |
-0.0396 |
|
mean blood pressure |
-0.0255 |
-0.0289 |
|
intraventricular conduction defect |
0.6083 |
0.5931 |
|
peak oxygen consumption |
-0.0546 |
-0.0621 |
|
serum sodium |
-0.0470 |
-0.0462 |
|
mean pulmonary capillary wedge pressure |
NA |
0.0285 |
heart failure survival score (HFSS) =
= ABS(SUM((parameter value) * (coefficient)))
where:
• ABS indicates absolute value for the expression
Interpretation using the Noninvasive Score:
|
HFSS |
Risk for 1 Year Mortality |
|
<= 7.19 |
high |
|
7.20 to 8.09 |
intermediate |
|
>= 8.10 |
low |
Purpose: To use the Heart Failure Survival Score (HFSS) to predict 1 year mortality risk in a patient with severe congestive heart failure.
Specialty: Cardiology, Surgery, general
Objective: risk factors, severity, prognosis, stage, complications, selection
ICD-10: Z94.1, I50,
