An echocardiogram checks how your heart's chambers and valves are pumping blood through your heart. An echocardiogram uses electrodes to check your heart rhythm and ultrasound technology to see how blood moves through your heart. An echocardiogram can help your doctor diagnose heart conditions.

Can an EKG detect a blockage?

An ECG Can Recognize the Signs of Blocked Arteries.

Since the test identifies anomalies of heart rhythm, impaired blood flow to the heart, otherwise known as ischemia, says WebMD, can also be identified.

What does a cardiogram measure?

An electrocardiogram (ECG or EKG) records the electrical signal from your heart to check for different heart conditions. Electrodes are placed on your chest to record your heart's electrical signals, which cause your heart to beat. The signals are shown as waves on an attached computer monitor or printer.