Echo BM Hospital Advanced Heart Imaging in Chennai An echocardiogram is a noninvasive ultrasound test that evaluates heart function. During an echo test, high-frequency sound waves from a hand-held wand placed on your chest provide pictures of the heart’s valves and chamber. These echoes are turned into moving pictures of your heart that can be seen on a video screen to evaluate the pumping action of your heart. BM Hospitals provides exercise- or medication-induced cardiac stress testing or treadmill testing.