If there is no angina (chest pain from lack of blood to heart cells), or if there is stable angina (pain with exertion only), medication that dilates the vessels is the appropriate treatment. You can google COURAGE study for information regarding interventional therapy and medical treatment for CAD.
Stenting, medication, by-pass doesn't fix the problem, it alleviates the symptoms. To fix the problem would be to reverse hard and soft plaque from the arteries.