| Doppler echocardiography | Use of Doppler ultrasonography techniques to augment two-dimensional echocardiography by allowing velocities to be registered within the echocardiographic image. See: duplex ultrasonography, Doppler ultrasonography. Synonym: duplex echocardiography. (05 Mar 2000) |
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| echocardiography, doppler | Measurement of intracardiac blood flow using an m-mode and/or two-dimensional (2-d) echocardiogram while simultaneously recording the spectrum of the audible doppler signal (e.g., velocity, direction, amplitude, intensity, timing) reflected from the moving column of red blood cells. (12 Dec 1998) |
| echocardiography, doppler, colour | Echocardiography applying the doppler effect, with the superposition of flow information as colours on a gray scale in a real-time image. (12 Dec 1998) |
| echocardiography, doppler, pulsed | Echocardiography applying the doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted at regular intervals and the echoes are demodulated as they return. (12 Dec 1998) |
| B-mode echocardiography | two-dimensional echocardiography |
| contrast echocardiography | The injection of contrast media of high echo reflectants (e.g., bubbles) to outline a chamber or delineate a shunt within the heart. (05 Mar 2000) |
| cross-sectional echocardiography | two-dimensional echocardiography |
| stress echocardiography | Echocardiographic monitoring of a circulatory challenge, usually exercise. Transesophageal echocardiography, recording of the echocardiogram from a transducer swallowed by the patient to predetermined distances in the oesophagus and stomach. Transthoracic echocardiography, the standard echocardiography recorded from echocardiographic "windows" on the precordium. Two-dimensional echocardiography, echocardiography in which an image is reconstructed from the echoes stimulated and detected by a linear array or moving transducers. Synonym: B-mode echocardiography, cross-sectional echocardiography. (05 Mar 2000) |
| duplex echocardiography | Use of Doppler ultrasonography techniques to augment two-dimensional echocardiography by allowing velocities to be registered within the echocardiographic image. See: duplex ultrasonography, Doppler ultrasonography. Synonym: duplex echocardiography. (05 Mar 2000) |
| echocardiography | 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 to detect abnormal anatomy or infections of the heart valves. (12 Dec 1998) |
| echocardiography, four-dimensional | Dynamic three-dimensional echocardiography using the added dimension of time to impart the cinematic perception of motion. (mayo clin proc 1993;68:221-40) (12 Dec 1998) |
| echocardiography, three-dimensional | Echocardiography amplified by the addition of depth to the conventional two-dimensional echocardiography visualizing only the length and width of the heart. Three-dimensional ultrasound imaging was first described in 1961 but its application to echocardiography did not take place until 1974. (mayo clin proc 1993;68:221-40) (12 Dec 1998) |
| echocardiography, transesophageal | Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the oesophagus. (12 Dec 1998) |
| carotid doppler | <investigation> A noninvasive test which uses high-frequency sounds waves to determine extent of blood flow through the carotid arteries in the neck. Used in the evaluation of stoke and TIA symptoms. (08 Jan 1998) |
| doppler | The use of an augmented listening device for the purpose of detecting the pulse in an extremity. Use in the evaluation of peripheral (occlusive) vascular disease. (27 Sep 1997) |