We prospectively performed serial differential sugar absorption test in 29 consecutively consented patients with advanced decompensated heart failure admitted to the heart failure intensive care unit for hemodynamically-guided therapy. We observed that intestinal barrier function was significantly impaired in our study cohort, and increased intestinal permeability was associated with elevated right atrial pressure and poorer prognosis yet without any association with systemic levels of the gut microbial metabolite, trimethylamine N-oxide (TMAO) or intestinal fatty acid binding protein that were thought to be indicative of intestinal abnormalities.
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