Chest tightness, shortness of breath and nausea, last test cardiac angiogram but having diff. getting hr down without getting bp too low, what next?

Many factors: I assume your angiogram was normal? & your heart rhythms has been recorded & normal? ("sinus tachycardia") - if either are incorrect, you need more specific treatment. To lower your heart rate without reducing your BP: force extra fluids and eat lots of salt. Potato chips & 2 qts of fluid daily. Ask your Dr about adding digoxin. Be sure TSH is normal. Low dose BB eg Nadolol 10 mg can help.

Emergency: Chest tightness, shortness of breath and nausea are a worrisome triad. If you are experiencing this right now, please go the the emergency department at the hospital immediately, Call 911.