Key result
Changes in log-transformed NT-proBNP levels were strongly positively associated with percent changes in left ventricular mass index over 6-month intervals (r = 0.78, p < 0.001).
Cohort (n=21)
Effect estimate: r = 0.78
p-value: p=<0.001
Changes in NT-proBNP levels closely correlate with variations in left ventricular mass index in stable hemodialysis patients, supporting its use as a biomarker for tracking LV hypertrophy.
Supports NT-proBNP tracking of LV mass changes in hemodialysis; extends biomarker data but leaves open clinical utility.
BACKGROUND/AIMS: Left ventricular (LV) hypertrophy is a powerful predictor of mortality in dialysis patients. Serial measurements of LV mass provide prognostic information. We evaluated the association between changes in biomarkers and changes in LV mass index (LVMI) in hemodialysis (HD) patients. METHODS: This was a prospective study of 21 stable HD patients with preserved LV ejection fraction (> or =50%). Echocardiography and measurements of N-terminal pro-brain natriuretic peptide (NT-proBNP), brain natriuretic peptide (BNP) and cardiac troponin T were performed on the same day and repeated 6 and 12 months later. RESULTS: At baseline, the NT-proBNP and BNP levels correlated with LVMI. Percent changes in LVMI were positively associated with those in log-transformed NT-proBNP levels during both the first (baseline vs. month 6, r = 0.78, p < 0.001) and the second 6 months (months 6 vs. 12, r = 0.73, p < 0.001). Among the 3 biomarkers, NT-proBNP was the only one that was related to changes in LVMI by multivariate correlation analysis, including age, sex, blood pressure, predialysis weight and use of angiotensin-converting enzyme inhibitor or angiotensin II receptor blocker. CONCLUSION: Our results show that changes in LVMI are closely correlated with variation in NT-proBNP levels in HD patients. These data have significant implications for the application of NT-proBNP as a biomarker for assessing changes in LVMI in HD patients.
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Choi et al. (2008) conducted a cohort in Hemodialysis (n=21). Changes in NT-proBNP levels was evaluated on Percent changes in left ventricular mass index (LVMI) (r = 0.78, p=<0.001). Changes in log-transformed NT-proBNP levels were strongly positively associated with percent changes in left ventricular mass index over 6-month intervals (r = 0.78, p < 0.001).
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