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

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All of the patients had negative echocardiograms and are being followed.
The original diagnosis from the recorded echocardiogram was normal in 73 studies (70%), left ventricular hypertrophy in 20 studies (19%), ventricular septal defect in 12 studies (11%), and 1 case of complex double-inlet left ventricle, ventricular inversion, L-transposition of the great arteries (Table 1).
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The data demonstrate a significantly lower risk of short-term mortality among critically ill patients receiving contrast-enhanced echocardiograms and affirm the clinical value of echocardiogram contrast agents as an important diagnostic tool for specialized patient populations," said Michael L.
All underwent echocardiography and physical examination within about a year of discontinuing medication, then had a follow-up echocardiogram and physical exam 1 year later.
All underwent echocardiography and physical examination within a year of discontinuing medication, then had a follow-up echocardiogram and physical exam 1 year later.
Of these subjects, 300 had an electrocardiogram (EKG) within 1 week before the echocardiogram, and the other 30 subjects who did not have EKGs were eliminated from the sample.
During that admission a diastolic murmur was note& and an echocardiogram showed severe aortic insufficiency with a thickened aortic valve.
The family history, physical, and ECG findings should then guide the decision to order an echocardiogram.
More recently, echocardiogram technology has improved, and stricter, more reliable diagnostic criteria have been defined.