Key result
Plasma adrenomedullin levels were higher in heart failure patients than controls (19.2 vs 13.3, p<0.005) and correlated significantly with Doppler-derived dP/dt (r=0.582, p<0.001).
Why the study?
Is plasma adrenomedullin concentration correlated with Doppler-derived dP/dt in patients with congestive heart failure?
Observational (n=75)
Is plasma adrenomedullin concentration correlated with Doppler-derived dP/dt in patients with congestive heart failure?
Plasma adrenomedullin correlates with Doppler-derived dP/dt and may serve as a marker of left ventricular dysfunction severity in heart failure.
Answers are grounded in this paper and cite their sources.
Adrenomedullin may mark LV dysfunction severity in HF; hypothesis-generating and requires prospective validation before clinical use.
BACKGROUND: Increased circulating adrenomedullin (AM) concentration has been reported in congestive heart failure (HF) and considered as a possible marker of cardiac dysfunction. HYPOTHESIS: The study was undertaken to assess the relationship between circulating AM concentration and left ventricular (LV) functional state, estimated by echo-Doppler techniques in patients with mild to moderate HF and different degrees of LV dysfunction. METHODS: Plasma AM, B-type natriuretic peptide (BNP), and N-terminal (NT) proBNP levels were measured in 55 patients with HF (New York Heart Association [NYHA] I n = 8, II n = 26, III n = 21) and in 20 controls; dP/dt was calculated by the Doppler tracing of the mitral regurgitation jet. RESULTS: The study was completed in 51 patients. Adrenomedullin levels were higher than in controls (19.2 +/- 1.4 vs. 13.3 +/- 0.7, p < 0.005) and elevated in proportion to NYHA functional class. B-type natriuretic peptide and NT-proBNP were 344 +/- 67 vs. 12 +/- 2 pg/ml and 2196 +/- 623 vs. 52 +/- 4 pg/ml, respectively (p < 0.0001); dP/dt was better related to AM (r = 0.582, p < 0.001) than to the other peptides. Adrenomedullin was significantly (p < 0.001) different between patients grouped according to the dP/dt cut-off predictive of event-free survival. CONCLUSIONS: The combination of depressed contractility and increased AM may provide a clue for further characterization of the severity of LV dysfunction in HF, independent of baseline LV ejection fraction.
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Morales et al. (2006) conducted an observational in Congestive heart failure (n=75). Plasma adrenomedullin measurement vs. Healthy controls was evaluated on Plasma adrenomedullin levels (p=< 0.005). Plasma adrenomedullin levels were higher in heart failure patients than controls (19.2 vs 13.3, p<0.005) and correlated significantly with Doppler-derived dP/dt (r=0.582, p<0.001).
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