Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2013 Sep;26(9):1063-72.
doi: 10.1016/j.echo.2013.06.006. Epub 2013 Jul 13.

Proximal isovelocity surface area by single-beat three-dimensional color Doppler echocardiography applied for tricuspid regurgitation quantification

Jose Alberto de Agustin  1 , Dafne Viliani, Catarina Vieira, Fabian Islas, Pedro Marcos-Alberca, Jose Juan Gomez de Diego, Ivan Javier Nuñez-Gil, Carlos Almeria, Jose Luis Rodrigo, Maria Luaces, Miguel Angel Garcia-Fernandez, Carlos Macaya, Leopoldo Perez de Isla
Affiliations

Proximal isovelocity surface area by single-beat three-dimensional color Doppler echocardiography applied for tricuspid regurgitation quantification

Jose Alberto de Agustin et al. J Am Soc Echocardiogr. 2013 Sep.

Abstract

Background: The two-dimensional (2D) proximal isovelocity surface area (PISA) method has known technical limitations, mainly the geometric assumptions of PISA shape required to calculate effective regurgitant orifice area (EROA). Recently developed single-beat real-time three-dimensional (3D) color Doppler imaging allows the direct measurement of PISA without geometric assumptions and has already been validated for mitral regurgitation assessment. The aim of this study was to apply this novel method in patients with chronic tricuspid regurgitation (TR).

Methods: Ninety patients with chronic TR were enrolled. EROA and regurgitant volume (Rvol) were assessed using transthoracic 2D and 3D PISA methods. Quantitative Doppler and 3D transthoracic planimetry of EROA were used as reference methods.

Results: Both EROA and Rvol assessed using the 3D PISA method had better correlations with the reference methods than using conventional 2D PISA, particularly in the assessment of eccentric jets. On the basis of 3D planimetry-derived EROA, 35 patients had severe TR (EROA ≥ 0.4 cm(2)). Among these 35 patients, 25.7% (n = 9) were underestimated as having nonsevere TR (EROA ≤ 0.4 cm(2)) using the 2D PISA method. In contrast, the 3D PISA method had 94.3% agreement (33 of 35) with 3D planimetry in classifying severe TR. Good intraobserver and interobserver agreement for 3D PISA measurements was observed, with intraclass correlation coefficients of 0.92 and 0.88 respectively.

Conclusions: TR quantification using PISA by single-beat real-time 3D color Doppler echocardiography is feasible in the clinical setting and more accurate than the conventional 2D PISA method.

Keywords: 2D; 3D; EROA; Effective regurgitant orifice area; PISA; Proximal isovelocity surface area; RAA; RJA; Regurgitant jet area; Regurgitant volume; Right atrial area; Rvol; TR; TTE; Three-dimensional; Three-dimensional echocardiography; Transthoracic echocardiographic; Tricuspid regurgitation; Two-dimensional; VC; Vena contracta.

PubMed Disclaimer

MeSH terms