Influence of transmitral filling dynamics on continuous-wave Doppler assessment of aortic regurgitation by half-time methods

1989 ◽  
Vol 64 (10) ◽  
pp. 614-619 ◽  
Author(s):  
Jean-Louis J. Vanoverschelde ◽  
Annie R. Taymans-Robert ◽  
Daniel A. Raphaël ◽  
Jacques R. Cosyns
Keyword(s):  
Aortic Regurgitation ◽  
Continuous Wave ◽  
Half Time ◽  
Continuous Wave Doppler

scholarly journals Quantitative assessment of the hemodynamic consequences of aortic regurgitation by means of continuous wave doppler recordings

1987 ◽  
Vol 10 (1) ◽  
pp. 135-141 ◽  
Author(s):  
Paul A. Grayburn ◽  
Rodney Handshoe ◽  
Mikel D. Smith ◽  
Michael R. Harrison ◽  
Anthony N. DeMaria
Keyword(s):  
Aortic Regurgitation ◽  
Quantitative Assessment ◽  
Continuous Wave ◽  
Continuous Wave Doppler

scholarly journals Calculation of Left Ventricular Relaxation Time Constant-Tau in Patients With Aortic Regurgitation by Continuous-Wave Doppler

2008 ◽  
Vol 2 (1) ◽  
pp. 28-30 ◽  
Author(s):  
Bai Xufang
Keyword(s):  
Relaxation Time ◽  
Aortic Regurgitation ◽  
Time Constant ◽  
Continuous Wave ◽  
Left Ventricular ◽  
Simple Method ◽  
Relaxation Time Constant ◽  
Left Ventricular Relaxation ◽  
Ventricular Relaxation ◽  
Continuous Wave Doppler

Left ventricular relaxation time constant, Tau, is the best index to evaluate left ventricular diastolic function. The measurement is only available traditionally in catheter lab. In Echo lab, several methods of non-invasive measurement of Tau have been tried since 1992, however almost all the methods are still utilizing the same formula to calculate Tau as in catheter lab, which makes them inconvenient, time-consuming and sometimes not very accurate. A simple method to calculate Tau in patients with mitral regurgitation has been developed just based on Weiss’ formula and simplified Bernoulli’s equation. Similarly, formulas are developed here by pure mathematical derivative to calculate Tau by continuous-wave Doppler in patients with aortic regurgitation.

scholarly journals Quantification of aortic regurgitation utilizing continuous wave Doppler ultrasound

1986 ◽  
Vol 8 (3) ◽  
pp. 592-599 ◽  
Author(s):  
Steve M. Teague ◽  
James A. Heinsimer ◽  
Jerome L. Anderson ◽  
Kevin Sublett ◽  
Edwin G. Olson ◽  
...  
Keyword(s):  
Aortic Regurgitation ◽  
Doppler Ultrasound ◽  
Continuous Wave ◽  
Continuous Wave Doppler

scholarly journals Noninvasive evaluation of aortic regurgitation by continuous-wave Doppler echocardiography.

Circulation ◽  
1986 ◽  
Vol 73 (3) ◽  
pp. 460-466 ◽  
Author(s):  
T Masuyama ◽  
K Kodama ◽  
A Kitabatake ◽  
S Nanto ◽  
H Sato ◽  
...  
Keyword(s):  
Aortic Regurgitation ◽  
Doppler Echocardiography ◽  
Continuous Wave ◽  
Noninvasive Evaluation ◽  
Continuous Wave Doppler

scholarly journals Limitations of continuous wave Doppler grading in aortic regurgitation: A chronic animal model study

1996 ◽  
Vol 27 (2) ◽  
pp. 239
Author(s):  
Masahiro Ishii ◽  
Michael Jones ◽  
Takahiro Shiota ◽  
Izumi Yamada ◽  
Russell Heinrich ◽  
...  
Keyword(s):  
Animal Model ◽  
Aortic Regurgitation ◽  
Continuous Wave ◽  
Continuous Wave Doppler ◽  
Model Study ◽  
Animal Model Study
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