MR analysis identified significant causal associations between the genes implicated in BW loss (ADD3, HSPA12A, SLC18A2, PDZD8, DUSP5, CASP7) as well as EF% and LV volumes (GPC6, UGGT2, SLAIN1, POU4F1, MBNL2) in BXD mice post-DOX and heart failure (HF) outcomes in humans. Here, SLC18A2 is linked to hydrops fetalis.