Can you tell me the difference between cardiac ischemia and coronary heart disease?

Overlap: Cardiac ischemia can be the result of coronary artery disease, cad, the latter being a progressive disease that can result in plaque/cholesterol building up in the coronary arteries and these stenoses or blockages can impair blood flow to the heart.Ischemia is the condition of blood flow and so oxygen being kept from a part of the body; cardiac ischemia is when this deprivation occurs in heart.

Ischemia: Is one of results of advanced CAD usually in blockages greater than 70% where the heart muscle is not getting enough blood flow with increased work load.