It's one of the deadliest syndromes you've never heard of, but experts are hoping to change that.

Nearly 9 of 10 Americans have not heard of cardiovascular-kidney-metabolic syndrome, even though about the same proportion are affected by it, a new survey by the American Heart Association suggests.

CKM syndrome represents a cluster of health problems occurring in one of the body's most essential "full circle systems," experts said. It includes heart disease, kidney disease, diabetes and obesity.

"The heart, kidney and metabolic systems are connected and, as such, should be treated in a coordinated way," Dr. Eduardo Sanchez, the AHA's chief medical officer for prevention, said in a news release. "These results reveal the need to emphasize those connections and help patients understand the importance of collaborative care."

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