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Echocardiography
Echocardiography A computer procedure that studies or evaluates the heart's function by using soundwaves recorded on an electronic sensor that produces a moving picture of the heart and heart valves.
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Heart
The hollow, muscular organ responsible for pumping blood through the circulatory system.
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Echocardiography, stress
A supplement to the routine exercise cardiac stress test. During stress echocardiography, the sound waves of ultrasound are used to produce images of the heart at rest and at the peak of exercise. In a heart with normal blood supply, all segments of the left ventricle (the major pumping chamber of the heart) exhibit enhanced contractions of the heart muscle during peak exercise. Conversely, in the setting of coronary artery disease (CAD), if a segment of the left ventricle does not receive optimal blood flow during exercise, that segment will demonstrate reduced contractions of heart muscle relative to the rest of the heart on the exercise echocardiogram.
Echocardiography, transesophageal
A diagnostic test which is done through the esophagus and which employs ultrasound waves to make images of the heart chambers, valves and surrounding structures. Transesophageal echocardiography (TEE) may be used, for example, in the treatment of children having heart surgery. TEE has unusually accurate imaging capabilities that permit the identification of previously unidentified anatomic features and postoperative surgical results that may necessitate a change in surgical plan or surgical revision before the child leaves the operating suite.
Echolalia
The pathological, parrotlike, and apparently senseless repetition (echoing) of a word or phrase just spoken by another person. echolalia Parrot-like repetition of overheard words or fragments of speech.
Echopraxia
Repetition by imitation of the movements of another. The action is not a willed or voluntary one and has a semiautomatic and uncontrollable quality.
Echovirus
A group of viruses found in the gastrointestinal tract. The "echo" part of the name stands for enteric cytopathic human orphan viruses. "Orphan" implied that they were viruses not associated with any disease. However, it is now known that echoviruses can cause a number of different diseases including rashes, diarrhea, respiratory infections (the common cold, sore throat, bronchitis, and bronchiolitis), myositis (muscle inflammation), meningitis, encephalitis, and pericarditis (inflammation of the membrane around the heart).
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Expiation
Atonement; penance.
Exteroceptive
Pertaining to a sensory organ that registers information from outside the body.
Extravasate
To seep through the skin, like drops of perspiration, or more accurately as plasma seeps through from the underlying capillaries to form droplets of lubrication on the adjoining vaginal mucosa.
Erection self-test
This is a test that determines the ability or inability to achieve an erection while sleeping.
Erection problems
An erection problem is the inability to get or maintain an erection that is firm enough for a man to have intercourse. You may be unable to get an erection at all, or you may lose the erection during intercourse before you are ready. If the condition persists, the medical term is erectile dysfunction.
Echocardiography
Eclampsia
A serious, life-threatening condition in late pregnancy in which very high blood pressure can cause a woman to have seizures.
Ectopic pregnancy
Pregnancy that develops outside the uterus, usually in one of the fallopian tubes.
Ejection fraction
The measurement of the blood pumped out of the ventricles.
Electrocardiogram
ECG or EKG. A test that records the electrical activity of the heart, shows abnormal rhythms (arrhythmias or dysrhythmias), and detects heart muscle damage.
Electrocoagulation
A procedure that uses an electrical current passed through an endoscope to stop bleeding in the digestive tract and to remove affected tissue.
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