41 female no heart disease all blood and strs test normal on bp med press good i smoke can this alone cause me to have a sudden heart attack?

AbsolutelyStressTest: of very low value because they are totally incapable of detecting arterial disease. They are only partially capable of detecting complications of very advanced arterial disease, i.e. severe narrowing (e.g. >75%) due to clots over previous plaque ruptures; see the illustration I have attached. While EKG stress tests work best, they are still very insensitive; Docs perform because insurance pays.