What is the difference between echocardiography and electrocardiography?

Echocardiography is a type of ultrasound that is used to create pictures of the heart. These pictures can show the size and shape of the heart, how well the heart is pumping blood, and any abnormalities in the heart.

Electrocardiography (ECG or EKG) is a test that records the electrical activity of the heart. This test can show abnormal rhythms (arrhythmias), damage to the heart, and areas of scarring on the heart.