Hypomagnesemia 7, Renal, with or Without Dilated Cardiomyopathy, is also known as homg7. An important gene associated with Hypomagnesemia 7, Renal, with or Without Dilated Cardiomyopathy is RRAGD (Ras Related GTP Binding D). Affiliated tissues include heart and kidney, and related phenotypes are hypomagnesemia and reduced left ventricular ejection fraction