An echocardiogram is an ultrasound procedure to examine your heart and its function, including the level of blood flow.
An ECG (Electrocardiogram) measures the electrical activity of the heart and gives important information about the rate and regularity of beats, the size and position of the chambers and any damage to the heart.
A transthoracic echocardiogram (TTE) is a diagnostic ultrasound test to look at the valves of your heart.