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Our aim was to determine if N-terminal pro-brain natriuretic peptide (NT-proBNP) or sonographic measurements of inferior vena caval (IVC) diameters and collapsibility index (IVC-CI) have a role in the monitoring of acute heart failure (AHF) therapy.

Inferior vena caval diameters of 50 healthy people (control group) were measured to determine the normal values of the IVC parameters. We then prospectively enrolled patients who were admitted to the emergency department (ED) with a primary diagnosis of AHF. At presentation, IVC diameters were measured during expiration and inspiration, and blood was drawn for NT-proBNP. We repeated the measurement of the IVC parameters and collected a second blood sample 12 hours after the therapy was administered. The data were analyzed in SPSS 15.0 (IBM, Armonk, NY) using the Student t test and Mann-Whitney U test.

A total of 97 subjects …