We identified that (i) LV SGLT1 expression shows differences according to HF etiology, (ii) SGLT1 expression positively correlates with LV dilation (LVEDD) and negatively correlates with LV systolic function (EF), and (iii) CRT affects SGLT1 expression mainly in patients with DCM. This evidence concerns the gene SLC5A1 and hydrops fetalis.