Abstract
The goal of the current review is to give an overview regarding the pathophysiology of iron deficiency in heart failure and how different laboratory tests change in the setting of heart failure. Recent studies have questioned the current employed definition of iron deficiency in the field of heart failure, as patients with ferritin < 100ng/ml but TSAT > 20% have a better prognosis, no iron deficiency on bone marrow staining, and altered treatment response to ferric carboxymaltose. This review summarizes changes in iron parameters in the setting of heart failure and underscores the importance of a reduced bioavailability of iron documented by a low serum iron or TSAT, irrespective of the presence of anemia.
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