The tests uses ultasound scan to detect blood flow disorders such as peripheral artrey disease (PAD), heart disease & Deep Vein Thrombosis (DVT). Symptoms of PAD includes weaknessor numbness in legs, painful cramping in hips, cold feeling in legs & change in color of legs. Shortness of breath, Swelling in your legs, feet, and/or abdomen & fatigue are the symptoms of heart disease.