Echocardiogram: A cardiac test and way to see the heart with the use of ultrasound imaging.

Electrocardiogram:  A method for studying the heart by measuring the electrical impulses of the heart as they are detected on the surface of the body. Also known as EKG or ECG.

Embolism:  A blood clot in a blood vessel.

Endocarditis:   A bacterial infection that can form on the valves and on the interior surfaces of the heart.

Extrasystoles:  Extra beats, usually occurring earlier than expected in normal rhythm, triggered by impulses originating from an abnormal site.