Folia Medica Indonesiana (Aug 2017)
ANALYSIS OF CHANGE IN NT-proBNP AFTER ANGIOTENSIN RECEPTOR BLOCKER (ARB) THERAPY IN PATIENT WITH HEART FAILURE
Abstract
NT-proBNP is an inactive fragment of BNP secreted by stretched ventricle as response to wall stress in patients with heart failure. As a specific cardiac marker, elevated NT-proBNP correlates well with heart failure severity. The principle of heart failure therapy is modulation on neurohormonal activation. ARB can modulate neurohormon on RAA system, that result in decreasing NT-proBNP level and favorable outcomes. Reduction in NT-proBNP more than biologic variability (> 25%) shows a therapy response.This study was to analyze change of NT-proBNP after ARB therapy in ambulatory HF patients. This observational prospective study was carried from September to December 2015. Blood sampling was performed on patients who meet the inclusion criteria of the study at first visit and after 2 months therapy. NT-proBNP was measured by IMMULITE® as primary parameter and creatinin as secondary parameter. There are 14 patients met the inclusion criteria of the study (11 males and 3 females). ARB therapy used in patients were Valsartan (64%), Telmisartan (22%) and Candesartan (14%). After 2 months ARB therapy, a decrease in level of NT-proBNP with initial median 3092.5 (216 – 32112) pg/ml to 2135.5 (350 – 16172) pg/ml respectively were statistically significant (p=0.003). And the secondary parameter creatinin serum convert to eGFR shows a change in eGFR with initial median 73.33 (37.05 – 266.68) ml/minute to 81.04 (39.31 – 167.02) ml/minute respectively were statistically not significant (p=0.657). There were 7 patients (50%) have a decrease > 25%. In this study, we found that ARB therapy can change NT-proBNP level significantly after 2 months therapy.
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