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Published on: October 1, 2019
A change in N-terminal pro-brain natriuretic peptide is predictive of outcome in patients with advanced heart failure
Roy S Gardner1, Kwok S Chong, James J Morton
1Department of Cardiology, Glasgow Royal Infirmary, Glasgow, UK. rsgardner@doctors.org.uk <rsgardner@doctors.org.uk>
Insights
Monitoring NT-proBNP levels in advanced heart failure patients helps predict mortality risk. A high NT-proBNP concentration or an increase over time indicates a greater chance of death.
Area of Science:
- Cardiology
- Biomarkers
- Prognostic Medicine
Background:
- Modern therapy improves chronic heart failure (CHF) prognosis, but identifying high-risk patients remains challenging.
- B-type natriuretic peptides are known predictors of CHF prognosis.
- The prognostic value of changes in NT-proBNP over time in advanced CHF is not well understood.
Purpose of the Study:
- To investigate the prognostic significance of NT-proBNP concentration and its change over time in advanced heart failure patients.
- To determine if NT-proBNP levels can identify patients at high risk of mortality.
Main Methods:
- Prospective study of 133 advanced CHF patients referred for cardiac transplantation evaluation.
- Plasma NT-proBNP levels measured at baseline and 4 months in 112 surviving patients.
- Median follow-up of 1003 days to assess all-cause mortality.
Main Results:
- All-cause mortality occurred in 26.8% of patients.
- Highest NT-proBNP at 4 months was significantly associated with increased mortality risk (p=0.001).
- Both NT-proBNP above median and absolute increase in NT-proBNP independently predicted mortality (p<0.0001).
Conclusions:
- A single NT-proBNP concentration above the median predicts mortality in advanced heart failure.
- A change in NT-proBNP concentration over 4 months is an independent predictor of mortality.
- NT-proBNP monitoring offers valuable prognostic information for advanced heart failure management.
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).
Conclusion:
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.
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