Yes, you're on the right track. A positive TMT (Treadmill Test) suggests that there may be reduced blood flow to the heart, and an angiogram is a standard follow-up to check for any blockages. It is possible that an angiogram might show no significant blockages; sometimes TMT results are positive due to other factors. Angiograms are generally safe, but they do carry minimal risks, such as bleeding, infection, or, rarely, an allergic reaction to the dye used.