• Jose Alberto de Agustin, 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, and Leopoldo Perez de Isla.
• Instituto Cardiovascular, Unidad de Imagen Cardiaca, Hospital Universitario San Carlos, Madrid, Spain. albertutor@hotmail.com
• J Am Soc Echocardiogr. 2013 Sep 1;26(9):1063-72.

BackgroundThe 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).MethodsNinety 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.ResultsBoth 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.ConclusionsTR 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.Copyright © 2013 American Society of Echocardiography. Published by Mosby, Inc. All rights reserved.

39 keywords...

hide…