Echocardiography involves a non-invasive diagnostic test that uses

ultrasound waves

to create either two-dimensional or three-dimensional images of the heart chambers, valves and surrounding structures. The images are called an

echocardiogram (ECHO).

Electrocardiography is a way to diagnose, evaluate and monitor such things as:

heart pumping function

and output;


; abnormal heart valves; damage to the heart muscle following a

heart attack

; infection or inflammation in the sac around the heart (pericarditis); infection on or around the heart valves (

infectious endocarditis

); the source of a

blood clot

after a


; and

congenital heart disease

(malformation of the heart or the large blood vessels near the heart).

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