Doppler echocardiography

Doppler echocardiography
Doppler echocardiography

Mitral valve
MeSH D015150
OPS-301 code: 3-052

Doppler echocardiography is a procedure which uses ultrasound technology to examine the heart.[1] An echocardiogram uses high frequency sound waves to create an image of the heart while the use of Doppler technology allows determination the speed and direction of blood flow by utilizing the Doppler effect.

An echocardiogram can, within certain limits, produce accurate assessment of the direction of blood flow and the velocity of blood and cardiac tissue at any arbitrary point using the Doppler effect. One of the limitations is that the ultrasound beam should be as parallel to the blood flow as possible. Velocity measurements allow assessment of cardiac valve areas and function, any abnormal communications between the left and right side of the heart, any leaking of blood through the valves (valvular regurgitation), calculation of the cardiac output and calculation of E/A ratio[2] (a measure of diastolic dysfunction). Contrast-enhanced ultrasound using gas-filled microbubble contrast media can be used to improve velocity or other flow-related medical measurements.

Although "Doppler" has become synonymous with "velocity measurement" in medical imaging, in many cases it is not the frequency shift (Doppler shift) of the received signal that is measured, but the phase shift (when the received signal arrives).

This procedure is frequently used to examine children's hearts for heart disease because there is no age or size requirement.

See also


  1. ^ MeSH Doppler+Echocardiography
  2. ^ [1] Abdul Latif Mohamed, Jun Yong, Jamil Masiyati, Lee Lim, Sze Chec Tee. The Prevalence Of Diastolic Dysfunction In Patients With Hypertension Referred For Echocardiographic Assessment of Left Ventricular Function. Malaysian Journal of Medical Sciences, Vol. 11, No. 1, January 2004, pp. 66-74

External links


MRI of brain and brain stem · MR neurography · Cardiac MRI/Cardiac MRI perfusion · MR angiography · MR cholangiopancreatography · Breast MRI

Functional MRI  · Diffusion MRI

Echocardiography / Doppler echocardiography (TTE · TEE) · Intravascular · Gynecologic · Obstetric · Echoencephalography · Transcranial doppler · Abdominal ultrasonography · Transrectal · Breast ultrasound · Transscrotal ultrasound · Carotid ultrasonography

Contrast-enhanced · 3D ultrasound · Endoscopic ultrasound · Emergency ultrasound (FAST· Duplex
Radionuclide Optical laser Thermography
Breast thermography

Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Doppler echocardiography — n Doppler ultrasound used to measure cardiovascular blood flow velocity for diagnostic purposes (as for evaluating valve function) * * * an echocardiographic technique that records the flow of red blood cells through the cardiovascular system by… …   Medical dictionary

  • doppler echocardiography — noun Usage: usually capitalized D : Doppler ultrasound used to measure cardiovascular blood flow velocity for diagnostic purposes (as for evaluating heart valve function) …   Useful english dictionary

  • continuous wave Doppler echocardiography — echocardiography employing continuous wave Doppler ultrasonography to record the flow of blood through the cardiovascular system …   Medical dictionary

  • pulsed wave Doppler echocardiography — echocardiography employing pulsed wave Doppler ultrasonography to record the flow of blood through the cardiovascular system …   Medical dictionary

  • 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

  • color Doppler echocardiography — color flow Doppler imaging …   Medical 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 — 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… …   The new mediacal dictionary

  • Doppler — Contents 1 Doppler effect and its applications 2 People 3 Other 4 …   Wikipedia

  • Doppler ultrasonography — ultrasonography in which the shifts in frequency between emitted ultrasonic waves and their echoes are used to measure the velocities of moving objects, based on the principle of the Doppler effect. The waves may be continuous or pulsed; the… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”