There’s now a new test that can predict a heart attack years — as many as seven years — before the patient has one.

Doctors don’t even look at your heart to conduct this test. They look at your fingers.

KCAL9′s Juan Fernandez spoke to Dr. Chris Renna of LifeSpan Medicine in Santa Monica to find out how the test works. “Endothelial function is the bomb. That’s the money,” he says.