An echocardiogram is an ultrasound of the heart, used to check the overall health of your heart.
In a stress test, you walk on a treadmill that makes your heart work progressively harder while an electrocardiogram (ECG) monitors your heart's electrical rhythms.
This test can determine whether you are at risk of having heart disease or not. Along with that, it can determine up to which level, an exercise can be safe for you. In this test, you will be told to walk on a treadmill and the performance of your heart is monitored as well as how much can your heart make up before having an arrhythmia or any abnormality in your blood supply.