Effect of aortic outflow on the quantification of mitral regurgitation using the flow convergence method

Joanne Hopmeyer; Serena Yang; Peter G. Walker; Franco Recusani; Ajit P. Yoganathan

Effect of aortic outflow on the quantification of mitral regurgitation using the flow convergence method

Joanne Hopmeyer, Serena Yang, Peter G. Walker, Franco Recusani, Ajit P. Yoganathan

IRCCS Fondazione Policlinico San Matteo

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The proximal isovelocity surface area (PISA) method has shown promise in the non-invasive assessment of mitral regurgitation. In this study, in-vitro steady flow studies were conducted to determine if the PISA method could be used to accurately estimate the regurgitant flow rate in the presence of complicating factors such as aortic outflow. By digitizing the color flow map, velocity information was obtained along the orifice centerline. These studies showed that the presence of aortic outflow caused isovelocity contours to merge with the aortic outflow for lower aliasing velocities, causing further overestimation in the regurgitant flow rate at large distances from the orifice, than for converging flows in the absence of aortic outflow. In addition, this study suggests that the digital flow map may be useful to quantify mitral regurgitation in the near future.

Original language	English
Title of host publication	American Society of Mechanical Engineers, Bioengineering Division (Publication) BED
Publisher	ASME
Pages	273-274
Number of pages	2
Volume	28
Publication status	Published - 1994
Event	Proceedings of the 1994 International Mechanical Engineering Congress and Exposition - Chicago, IL, USA Duration: Nov 6 1994 → Nov 11 1994

Other

Other	Proceedings of the 1994 International Mechanical Engineering Congress and Exposition
City	Chicago, IL, USA
Period	11/6/94 → 11/11/94

ASJC Scopus subject areas

Engineering(all)

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Effect of aortic outflow on the quantification of mitral regurgitation using the flow convergence method. / Hopmeyer, Joanne; Yang, Serena; Walker, Peter G.; Recusani, Franco; Yoganathan, Ajit P.

American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. Vol. 28 ASME, 1994. p. 273-274.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hopmeyer, J, Yang, S, Walker, PG, Recusani, F & Yoganathan, AP 1994, Effect of aortic outflow on the quantification of mitral regurgitation using the flow convergence method. in American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. vol. 28, ASME, pp. 273-274, Proceedings of the 1994 International Mechanical Engineering Congress and Exposition, Chicago, IL, USA, 11/6/94.

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abstract = "The proximal isovelocity surface area (PISA) method has shown promise in the non-invasive assessment of mitral regurgitation. In this study, in-vitro steady flow studies were conducted to determine if the PISA method could be used to accurately estimate the regurgitant flow rate in the presence of complicating factors such as aortic outflow. By digitizing the color flow map, velocity information was obtained along the orifice centerline. These studies showed that the presence of aortic outflow caused isovelocity contours to merge with the aortic outflow for lower aliasing velocities, causing further overestimation in the regurgitant flow rate at large distances from the orifice, than for converging flows in the absence of aortic outflow. In addition, this study suggests that the digital flow map may be useful to quantify mitral regurgitation in the near future.",

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PY - 1994

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N2 - The proximal isovelocity surface area (PISA) method has shown promise in the non-invasive assessment of mitral regurgitation. In this study, in-vitro steady flow studies were conducted to determine if the PISA method could be used to accurately estimate the regurgitant flow rate in the presence of complicating factors such as aortic outflow. By digitizing the color flow map, velocity information was obtained along the orifice centerline. These studies showed that the presence of aortic outflow caused isovelocity contours to merge with the aortic outflow for lower aliasing velocities, causing further overestimation in the regurgitant flow rate at large distances from the orifice, than for converging flows in the absence of aortic outflow. In addition, this study suggests that the digital flow map may be useful to quantify mitral regurgitation in the near future.

AB - The proximal isovelocity surface area (PISA) method has shown promise in the non-invasive assessment of mitral regurgitation. In this study, in-vitro steady flow studies were conducted to determine if the PISA method could be used to accurately estimate the regurgitant flow rate in the presence of complicating factors such as aortic outflow. By digitizing the color flow map, velocity information was obtained along the orifice centerline. These studies showed that the presence of aortic outflow caused isovelocity contours to merge with the aortic outflow for lower aliasing velocities, causing further overestimation in the regurgitant flow rate at large distances from the orifice, than for converging flows in the absence of aortic outflow. In addition, this study suggests that the digital flow map may be useful to quantify mitral regurgitation in the near future.

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