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.