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    • ECHO (Echocardiogram)

    Echocardiography
    The process of reflecting ultrasound Doppler signals off the heart and surrounding anatomical structures to visualize cardiac activity and structure, and facilitate diagnosis.

    Edema
    Accumulation of an excessive amount of watery fluid in cells, tissues or serous cavities.

    EEG (Electroencephalogram)
    A diagnostic test that records the electrical activity of the brain. Electrodes are laced on different locations of the scalp, and the difference between the electrical potential of the two sites is recorded.

    Ejection Fraction (EF)
    The portion of the end-diastolic volume that is actually ejected (normally about two-thirds).

    Electrocardiogram (ECG or EKG)
    A graphic representation of the electrical activity of the heart. Also called an ECG or EKG.

    Emboli
    Mass of undissolved matter in a blood vessel brought there by blood current or flow. Emboli may be solid, liquid or gaseous. Emboli may consist of bits of tissue, tumor cells, fat globules, air bubbles, clumps of bacteria, and foreign bodies.

    Endoscopic Vein Harvesting (EVH)
    A process in which a section of a vein is taken from one part of the body to repair or replace a diseased blood vessel in another body area. For example, the saphenous vein, located in the leg, may be harvested for use during coronary artery bypass surgery.

    Endotracheal Tube
    Tube used inside the trachea to provide an airway through the trachea while preventing aspiration of foreign material into the bronchus.

    Epiaortic Ultrasound Imaging
    Use of ultrasound to determine the location and severity of atherosclerotic disease in the ascending aorta. More sensitive than TEE or manual palpation.

    Erythrocyte
    A mature red blood cell that contains molecular hemoglobin.

    Exercise Tolerance Testing
    Stress test; a diagnostic test in which the patient exercises on a treadmill, bicycle, or other equipment while heart activity is monitored by an ECG

    Extubation
    Removal of a tube from an organ, structure, or orifice; specifically, removal of the tube after intubation.

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