Echocardiography

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echocardiography

[‚ek·ō‚kärd·ē′äg·rə·fē]
(medicine)
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.

Echocardiography

 

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.

REFERENCE

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

N. M. MUKHARLIAMOV

References in periodicals archive ?
Kleinman has found M-mode echocardiography to be particularly valuable since it traces cardiac chamber motion over time and permits detailed plotting of atrial versus ventricular activation in real time.
During 1979-1981, more than 2,000 people participating in the Framingham Heart Study underwent M-mode echocardiography
studied right heart impairment in COPD together with hemodynamics, using M-mode echocardiography. They showed that Right Ventricular Index (RVI) or the end-diastolic right ventricular diameter and the Right Ventricular Anterior Wall Thickness (RVAWT) were increased in most patients of the study group.
Ejection fraction, endocardial fractional shortening ([sub.e]FS), meridional end-systolic stress ([sub.m]ESS), stress-adjusted [sub.e]FS (observed /predicted [sub.e]FS) were measured by M-mode echocardiography. Relationship between the left ventricular mass index and [sub.m]ESS was assessed by Pearson's linear regression model.
Two-dimensionally (2D)-guided M-mode echocardiography and pulse-wave Doppler echocardiography were performed using an echocardiographic system equipped with a 10 MHz sector probe at 6MHz (Vivid 7, General Electric, Horten Norway).
All children underwent M-mode echocardiography and Doppler evaluation at rest, in supine position.
Another preferred method for assessing left ventricular diastolic function is the measurement of Vp by color M-mode echocardiography (34).