echocardiography


echocardiography
n.
the use of ultrasound waves to investigate and display the action of the heart as it beats. Used in the diagnosis and assessment of congenital and acquired heart diseases, it is safe, painless, and reliable and reduces the need for cardiac catheterization. M-mode echocardiography uses a single beam of ultrasound. The image produced is not anatomical but permits precise measurement of cardiac dimensions and the diagnosis of valvular, myocardial, and pericardial disease. Real-time echocardiography uses a pulsed array of ultrasound beams to build up a moving image on a TV monitor of the chambers and valves of the heart. In Doppler echocardiography ultrasound reflected from moving red blood cells is subject to the Doppler effect (change of frequency with velocity relative to the observer), which can be used to calculate blood flow and pressure within the heart and great vessels. It is useful in the diagnosis and assessment of valve disease and intracardiac shunts. In transoesophageal echocardiography the ultrasound probe is mounted on an oesophageal endoscope. The examination from within the oesophagus allows the probe to be placed directly against the back of the heart, which enables improved visualization of the posterior structures.

The new mediacal dictionary. 2014.

Look at other dictionaries:

  • Echocardiography — is a diagnostic test which uses ultrasound waves to make images of the heart chambers, valves and surrounding structures. It can measure cardiac output and is a sensitive test for inflammation around the heart (pericarditis). It can also be used… …   Medical dictionary

  • echocardiography — [ek΄ō kär΄dē äg′rə fē] n. pl. echocardiographies a technique for examining the internal structure of the heart, using reflections from high frequency sound waves to form a picture or display (echocardiogram) echocardiographic [ek΄o car΄dē ə… …   Universalium

  • echocardiography — [ek΄ō kär΄dē äg′rə fē] n. pl. echocardiographies a technique for examining the internal structure of the heart, using reflections from high frequency sound waves to form a picture or display (echocardiogram) echocardiographic [ek΄o car΄dē ə… …   English World dictionary

  • Echocardiography — An echocardiogram is a sonography of the heart. Also known as a cardiac ultrasound, it uses standard ultrasound techniques to image two dimensional slices of the heart. The latest ultrasound systems now employ 3D real time imaging.In addition to… …   Wikipedia

  • echocardiography — noun (plural phies) Date: 1965 the use of ultrasound to examine the structure and functioning of the heart for abnormalities and disease • echocardiographer noun • echocardiographic adjective …   New Collegiate Dictionary

  • echocardiography — noun The use of ultrasound to produce images of the heart See Also: echocardiogram, echocardiograph …   Wiktionary

  • echocardiography — n. (Medicine) examination of the heart using ultrasound …   English contemporary dictionary

  • echocardiography — [ˌɛkəʊkα:dɪ ɒgrəfi] noun Medicine the use of ultrasound waves to investigate the action of the heart. Derivatives echocardiogram noun echocardiograph noun echocardiographic adjective …   English new terms dictionary

  • echocardiography — echo·cardiography …   English syllables

  • echocardiography — A procedure that uses ultrasonic waves directed over the chest wall to obtain a graphic record of the heart s position, motion of the walls, or internal parts such as the valves …   English dictionary of cancer terms