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PW, E=A

English translation: PW = Pulsed Wave (doppler echocardiography), E-peak = A-peak

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
German term or phrase:PW, E=A
English translation:PW = Pulsed Wave (doppler echocardiography), E-peak = A-peak
Entered by: gwolf
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19:52 Mar 15, 2001
German to English translations [PRO]
Medical
German term or phrase: PW, E=A
In einem medizinischen Untersuchungsbericht, nachfolgend der Abschnitt, in dem diese Abkuerzungen auftauchen:

Transthorakale Echokardiographie:
IVS 14, LVED 48, *PW* 12 mm. *E = A*, infero-apikale Hypokinesie, sonst gute linksventrikulaere Funktion, E > 70 %.

Jeder Hinweis willkommen. Vielen Dank!
Ulrike Spitzer
Local time: 19:30
PW = Pulsed Wave (doppler echocardiography), E-peak = A-peak
Explanation:
Two types of Doppler echocardiography are used clinically: pulsed wave and continuous wave. Pulsed wave (PW) Doppler uses short bursts of ultrasound transmitted to a point (designated the "sample volume") distant from the transducer. The advantage of this type of Doppler is that blood flow velocity, direction and spectral characteristics from a specified point in the heart or blood vessel can be calculated. The main disadvantage is that the maximum velocity that can be measured is limited because the pulse repetition frequency is limited. Continuous wave (CW) Doppler uses dual crystals so that ultrasound waves can be simultaneously and continuously sent and received. There is no maximum measurable velocity (Nyquist limit) with CW so high velocity flows can be measured. The disadvantage with CW Doppler is that sampling of blood flow velocity and direction occurs all along the ultrasound beam, not in a specified area.

Color flow Doppler echocardiography is a form of PW Doppler ultrasonography which combines the M-mode and 2-D modalities with blood flow imaging. With color flow Doppler, multiple sample volumes are analyzed along multiple scan lines. The mean frequency shift obtained from these many sample volumes is color-coded for direction and velocity. Several types of mapping are usually available. Most systems code blood flow toward the transducer as red and flow away as blue. Differences in relative velocity of flow can be accentuated, and the presence of multiple velocities and directions of flow (turbulence) can be indicated by different maps which utilize variations in brightness and color.

http://cal.nbc.upenn.edu/lgcardiac/echo_tutorial/types.htm

Doppler examination of flow across the AV valves gives information about the presence of AV valve regurgitation and/or stenosis. Additionally, diastolic function and cardiac rhythm can be assessed. In the normal human fetus there is no difference in the shape of the Doppler tracing across tricuspid or mitral valve. As in postnatal life it consists of two clearly separated peaks, the first peak representing early diastolic ventricular filling (E-peak) and the second peak representing late diastolic ventricular filling due to atrial contraction (A-peak

E = A -> E-peak = A-peak

See also this website:

http://www.kinderherzzentrum.at/anglo/Forprofs/txprof_fetal_...

HTH
Selected response from:

gwolf
Local time: 22:30
Grading comment
Excellent explanation, very helpful.
Thank you!
4 KudoZ points were awarded for this answer

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Summary of answers provided
naPW = Pulsed Wave (doppler echocardiography), E-peak = A-peakgwolf


  

Answers


2 hrs
PW = Pulsed Wave (doppler echocardiography), E-peak = A-peak


Explanation:
Two types of Doppler echocardiography are used clinically: pulsed wave and continuous wave. Pulsed wave (PW) Doppler uses short bursts of ultrasound transmitted to a point (designated the "sample volume") distant from the transducer. The advantage of this type of Doppler is that blood flow velocity, direction and spectral characteristics from a specified point in the heart or blood vessel can be calculated. The main disadvantage is that the maximum velocity that can be measured is limited because the pulse repetition frequency is limited. Continuous wave (CW) Doppler uses dual crystals so that ultrasound waves can be simultaneously and continuously sent and received. There is no maximum measurable velocity (Nyquist limit) with CW so high velocity flows can be measured. The disadvantage with CW Doppler is that sampling of blood flow velocity and direction occurs all along the ultrasound beam, not in a specified area.

Color flow Doppler echocardiography is a form of PW Doppler ultrasonography which combines the M-mode and 2-D modalities with blood flow imaging. With color flow Doppler, multiple sample volumes are analyzed along multiple scan lines. The mean frequency shift obtained from these many sample volumes is color-coded for direction and velocity. Several types of mapping are usually available. Most systems code blood flow toward the transducer as red and flow away as blue. Differences in relative velocity of flow can be accentuated, and the presence of multiple velocities and directions of flow (turbulence) can be indicated by different maps which utilize variations in brightness and color.

http://cal.nbc.upenn.edu/lgcardiac/echo_tutorial/types.htm

Doppler examination of flow across the AV valves gives information about the presence of AV valve regurgitation and/or stenosis. Additionally, diastolic function and cardiac rhythm can be assessed. In the normal human fetus there is no difference in the shape of the Doppler tracing across tricuspid or mitral valve. As in postnatal life it consists of two clearly separated peaks, the first peak representing early diastolic ventricular filling (E-peak) and the second peak representing late diastolic ventricular filling due to atrial contraction (A-peak

E = A -> E-peak = A-peak

See also this website:

http://www.kinderherzzentrum.at/anglo/Forprofs/txprof_fetal_...

HTH


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gwolf
Local time: 22:30
Native speaker of: Native in GermanGerman, Native in EnglishEnglish
PRO pts in pair: 250
Grading comment
Excellent explanation, very helpful.
Thank you!
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