Author: Glossary
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Echomimia
Imitation of the actions of others, as seen in schizophrenia.
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Echoencephalogra
Recording of the ultrasonic echoes of the brain, a technique that is rarely used since the advent of computed tomography and magnetic resonance imaging.
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Transthoracic echocardiography
Imaging of the heart and great vessels by means of an ultrasonic transducer placed on the chest wall. Sound waves are transmitted to the underlying organs (e.g., the heart or aorta), and an image is constructed from those that rebound toward the transducer.
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Stress echocardiography
The ultrasonic identification of segments of heart muscle that do not move properly when a patient with coronary artery disease exercises or takes a vasodilating drug (e.g., adenosine or dipyridamole). Stress-induced impairments in regional heart muscle activity are used as markers of obstructions in specific coronary arteries.
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Multidimensional visualization echocardiography
An experimental echocardiographic technique using computer technology for three-dimensional visualization of cardiac structures. This becomes four dimensional when time is used to impart the cinematic perception of motion.
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Dobutamine stress echocardiography
A noninvasive test for coronary artery disease in which dobutamine is given to patients to increase the workload of the heart, and then the heart is evaluated with ultrasonic imaging. Regions of the heart that do not receive adequate blood flow (ischemic regions) contract poorly during the stress of the test but normally when the…
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Echocardiogra
The graphic record produced by echocardiography.
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Amphoric echo
A sound, sometimes heard in auscultation of the chest, resembling the sound of air blown over the mouth of a bottle.
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Echo
A reverberating sound produced when sound waves are reflected back to their source.
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Echis carinatus
The Indian saw-scaled viper. Its venom contains a prothrombin activator, a potent anticoagulant.