Serum cTn‐I level, as another indicator of cardiac ischaemia, was not different from that of the control group in the SD‐fed hyperglycaemic I/R group, but cTn‐I was significantly elevated when the I/R‐rats were fed with HF‐HCD (P = 0.0024; Figure 4b). Here, TNNI3 is linked to hydrops fetalis.