An ultrasound test can tell if people with the human immunodeficiency virus (HIV) and heart disease are at risk of heart attack or death, according to new research reported in Circulation: Cardiovascular Imaging, an American Heart Association journal. Stress echocardiography, better known as a “stress echo,” is an ultrasound of the heart during rest and stress that determines risk of heart attack and death in patients with known or suspected blockages in the blood vessels supplying the heart.