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echocardiogram See echocardiography below.

echocardlography/echography A diagnostic procedure that uses high-frequency (ultrasound) waves to visualize structures within the heart. The picture produced is called an echocardiogram.

eclampsia A rare disorder in pregnancy characterized by seizures, coma, and sometimes death. It is marked by hypertension, the excretion of protein in the urine, and swelling (edema).

edema A swelling of parts of the body because of fluid retention.

electrocardiogram (ECG or EKG) A visual record of the heart’s electrical activity.

electrocardiography A diagnostic procedure that records the electrical activity of the heart muscle.

embolism, embolus, emboli A clot or other substance carried in the bloodstream from one site to another, causing the blockage of an artery. Emboli is the plural.

endarterectomy A surgical procedure to remove the interior lining of an artery that has been narrowed by fatty deposits.

endocarditis Inflammation of the interior lining of the heart (the endocardium) and heart valves; generally occurs because of bacterial infection or rheumatic fever.

endocardium The interior lining of the heart.

epinephrine: One of the hormones produced by the adrenal glands. It is secreted in stressful situations and dilates blood vessels and increases heart rate. Also known as adrenaline.

estrogen The female sex hormone produced by the ovaries. It is instrumental in reproduction. The ovaries cease to produce estrogen after menopause, and this lack of estrogen is believed to make older women more vulnerable to heart disease.

exercise stress test An electrocardiogram that is done while a person exercises, usually on a treadmill (often called a treadmill test) or a stationary bicycle.

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