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A diagnostic technique for the heart that uses a transducer held against the chest to send high-frequency sound waves which pass harmlessly into the heart; as they strike structures within the heart, they are reflected back to the transducer and recorded on an oscilloscope.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a method of examining the heart by means of ultrasound. Echocardiography is based on the recording of ultrasonic waves reflected from the surfaces of heart structures differing in density. Under normal conditions, curves are recorded successively from the walls of the aorta and left atrium, the anterior and posterior cusps of the mitral valve, the interventricular septum, and the posterior wall of the left ventricle.

Echocardiography is used to diagnose acquired and, to a lesser extent, congenital valvular diseases. It helps determine the condition of the cusps and the extent of narrowing of the valve openings; it identifies defects in the septa, large transposed blood vessels, and hypoplasia. Echocardiology is also used to diagnose pericarditis with effusion, tumors, and other abnormal conditions. The procedure is used to measure the volume, wall thickness, and mass of the muscular layer of the left ventricle; the stroke volume; and some other parameters of the blood circulation. By combining echocardiography and ultrasonic scanning one can obtain successive images of heart structures that reflect their dynamics during systole and diastole.


Kardiologiia, 1974, no. 1, pp. 82–86; 1976, no. 6, pp. 15–25.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
In the second post-EHR year that we examined, a total of 7,317 patients underwent a transthoracic echocardiogram. Within six months of the index study, 5.7% of patients underwent another full echocardiogram, representing a 24% increase in duplicate testing when compared to the pre-EHR rate (p < 0.01).
Transthoracic Echocardiogram showed the left ventricle with conserved systolic function, mild aortic insufficiency with calcified valve, and a fixed structure on the wall of the pulmonary artery with erratic movement indicative of vegetation on orifice of PDA (Figs.
Transthoracic echocardiogram was performed showing a mobile vegetation attached to the anterior cusp of the aortic valve.
At that time a loud systolic murmur was heard at the cardiac apex and an emergent transthoracic echocardiogram showed severe systolic anterior motion of mitral valve (SAM) and dynamic obstruction of the left ventricular outflow tract (LVOT) with a mean pressure gradient of 64 mmHg (Figure 1).
Sleep lab data and individual transthoracic echocardiogram reports were reviewed.
A transthoracic echocardiogram was obtained, which showed normal left ventricular function without any wall motion abnormality or valvular pathology.
A Doppler study with transthoracic echocardiogram showed the RVOT to have a systolic gradient of 60 mmHg and was the most probable source of the murmur.
A transthoracic echocardiogram (TTE) demonstrated a near total collapse of the right atrium and the right ventricle due to compression by an adjacent cystic structure covered with a thick membrane (Figure 1).
There are three types of Echocardiography: Transthocardiography also known as Transthoracic Echocardiogram (TTE), Transo-esophageal Echocardiogram (TOE) and 3-Dimensional echocardiography (3D Echo)
A transthoracic echocardiogram done at the bedside showed rupture of the septal cavity from the outlet septum into the left sinus of Valsalva of the pulmonary artery, creating a left ventricle to pulmonary artery communication with left to right shunting seen on color Doppler (Figure 2).
(The more routine procedure is a transthoracic echocardiogram.)