A change in N-terminal pro-brain natriuretic peptide is predictive of outcome in patients with advanced heart failure.
BACKGROUND
The prognosis of chronic heart failure has improved with modern medical therapy. However, identifying those patients who fail to respond to such therapy and therefore those who remain at high risk is notoriously difficult. The B-type natriuretic peptides are established independent predictors of prognosis in CHF. However, the relevance of a change in NT-proBNP concentration over time in advanced heart failure is unknown.


METHODS
We prospectively studied 133 patients with advanced CHF referred for consideration of cardiac transplantation. Plasma for NT-proBNP analysis was sampled at baseline and a median of 4 months later in the 112 patients surviving without cardiac transplantation. Patients were followed up for a median of 1003 days.


RESULTS
The primary endpoint of all-cause mortality occurred in 30 (26.8%) patients. Those subjects who had the highest NT-proBNP concentration at 4 months were at the greatest risk of death (log rank statistic=10.4, p=0.001). On Cox regression analysis, both a NT-proBNP concentration above the median and an absolute increase in NT-proBNP were independent predictors of mortality (chi(2)=53, p<0.0001 and chi(2)=17.3, p<0.0001, respectively).


CONCLUSIONS
A single NT-proBNP concentration above the median and a change in NT-proBNP concentration over a 4-month period were independent predictors of mortality in patients with advanced heart failure.
Gardner
Roy S
RS
Department of Cardiology, Glasgow Royal Infirmary, Glasgow, UK. rsgardner@doctors.org.uk <rsgardner@doctors.org.uk>
Chong
Kwok S
KS
Morton
James J
JJ
McDonagh
Theresa A
TA
D000328:Adult; D015415:Biomarkers / Q000097:blood; D005260:Female; D005500:Follow-Up Studies; D006333:Heart Failure / Q000097:blood / Q000401:mortality*; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain / Q000097:blood*; D010446:Peptide Fragments / Q000097:blood*; D011379:Prognosis; D016016:Proportional Hazards Models; D011446:Prospective Studies; D015996:Survival Rate; D018487:Ventricular Dysfunction, Left / Q000150:complications
D015415:Biomarkers; D010446:Peptide Fragments; C109794:pro-brain natriuretic peptide (1-76); D020097:Natriuretic Peptide, Brain