This test is similar to an ECG but records the activity of the heart when it is made to work hard. This is usually done by asking the person to walk or run on a treadmill. This is called a TMT( Treadmill test) . For people who have difficulty walking, an injection is given, which will make the heart beat faster, and then an ECG recording is done with simultaneous ultrasound scanning of the heart, i.e., echocardiography . During the period of this test, the person is lying on a bed, and the whole procedure lasts for about half an hour.

Stress testing is more informative as compared to a normal ECG, as during stress, silent or mild abnormalities in the heart can be better detected .