scholarly journals Dynamics of mitral regurgitant flow and orifice area. Physiologic application of the proximal flow convergence method: clinical data and experimental testing.

Circulation ◽  
1994 ◽  
Vol 90 (1) ◽  
pp. 307-322 ◽  
Author(s):  
E Schwammenthal ◽  
C Chen ◽  
F Benning ◽  
M Block ◽  
G Breithardt ◽  
...  
Keyword(s):  
Clinical Data ◽  
Experimental Testing ◽  
Orifice Area ◽  
Regurgitant Flow ◽  
Method Clinical Data ◽  
Convergence Method ◽  
Flow Convergence

scholarly journals Application of the proximal flow convergence method to calculate the effective regurgitant orifice area in aortic regurgitation

1998 ◽  
Vol 32 (4) ◽  
pp. 1032-1039 ◽  
Author(s):  
Christophe M Tribouilloy ◽  
Maurice Enriquez-Sarano ◽  
Sara L Fett ◽  
Kent R Bailey ◽  
James B Seward ◽  
...  
Keyword(s):  
Aortic Regurgitation ◽  
Orifice Area ◽  
Convergence Method ◽  
Flow Convergence ◽  
Regurgitant Orifice Area

scholarly journals Validation of the proximal flow convergence method. Calculation of orifice area in patients with mitral stenosis.

Circulation ◽  
1993 ◽  
Vol 88 (3) ◽  
pp. 1157-1165 ◽  
Author(s):  
L Rodriguez ◽  
J D Thomas ◽  
V Monterroso ◽  
A E Weyman ◽  
P Harrigan ◽  
...  
Keyword(s):  
Mitral Stenosis ◽  
Orifice Area ◽  
Method Calculation ◽  
Convergence Method ◽  
Flow Convergence

Color flow Doppler determination of transmitral flow and orifice area in mitral stenosis: Experimental evaluation of the proximal flow-convergence method

1995 ◽  
Vol 129 (1) ◽  
pp. 114-123 ◽  
Author(s):  
Takahiro Shiota ◽  
Michael Jones ◽  
Lilliam M. Valdes-Cruz ◽  
Robin Shandas ◽  
Izumi Yamada ◽  
...  
Keyword(s):  
Experimental Evaluation ◽  
Mitral Stenosis ◽  
Transmitral Flow ◽  
Color Flow ◽  
Orifice Area ◽  
Convergence Method ◽  
Flow Convergence

Pulsatile Flow Computational Simulations of Mitral Regurgitation

1998 ◽  
Vol 120 (2) ◽  
pp. 245-254 ◽  
Author(s):  
J. Hopmeyer ◽  
P. W. Wilkerson ◽  
K. M. Thorvig ◽  
R. A. Levine ◽  
A. P. Yoganathan
Keyword(s):  
Mitral Regurgitation ◽  
Flow Rate ◽  
Pulsatile Flow ◽  
Three Dimensional ◽  
Computational Simulations ◽  
Clear Zone ◽  
Regurgitant Flow ◽  
Convergence Method ◽  
Flow Convergence ◽  
Complicating Factors

The noninvasive quantification of mitral regurgitation remains an important clinical goal. Recently, the flow convergence method was developed to estimate the regurgitant flow rate. This study used three-dimensional pulsatile flow computational simulations to evaluate the accuracy of the flow convergence method in the presence of complicating factors such as ventricular confinement, noncircular orifice shape, and the presence of aortic outflow. Results showed that in the absence of aortic outflow and ventricular confinement, there was a plateau zone where the calculated flow rate by the hemispheric formula approximated the true flow rate, independent of the orifice shape. In the presence of aortic outflow and in chambers of physiologic dimensions, there was no longer a clear zone where the hemispheric formula was valid. The hemi-elliptic modiflcation of the flow convergence method worked in all cases, independent of the degree of ventricular confinement or the presence of aortic outflow. Therefore, application of the hemi-elliptic formula should be considered in future clinical studies.

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