In 1988, Gerry Reaven gave a lecture at the American Diabetes Association Congress, in which he described insulin resistance, diabetes mellitus, hyperinsulinism, increased lipoproteins, decreased HDL-cholesterol, and hypertension. He called this syndrome "syndrome X".
However, the name did not differ from cardiac syndrome X, it was only introduced in 1978 by Kemp, so the use of the name "metabolic syndrome" eventually expanded.