Right Atrial Indexed Volume in Healthy Adult Population: Reference Values for Two‐Dimensional and Three‐Dimensional Echocardiographic Measurements

Authors:
Publisher website
Google Scholar
Abstract
Background: Current guidelines do not recommend routine assessment of right atrial volume due to the lack of standardized data. Three‐dimensional wall‐motion tracking (3D‐WMT) is a new technology that allows us to calculate volumes without any geometric assumptions. The aim of this study was to define the indexed reference values for two‐dimensional echocardiography (2D‐echo) and 3D‐WMT in adult healthy population and to assess the intermethod, intra‐ and interobserver agreement.Methods: Prospective study. Nonselected healthy subjects were enrolled. Every patient underwent a 2D‐echo and a 3D‐WMT examination. 2D‐echo right atrial volume was obtained by using the area‐length method (A‐L) from four‐ and two‐chamber view. 3D‐echo volumes were assessed by 3D‐WMT. Values were indexed by the patient's body surface area.Results: Sixty consecutive healthy subjects were enrolled. Mean age was 57 ± 12‐years old and 27 patients (45%) were male. Average indexed right atrial volume obtained by 2D‐echo and 3D‐echo was 16.76 ± 8.15 mL/m2 and 19.05 ± 6.87 mL/m2, respectively. Univariate linear regression analysis between 2D‐echo and 3D‐echo right atrial volumes shows a weak correlation between right atrial volume obtained with 2D‐echo compared with 3D‐WMT (r = 0.29, CI 95% 0.029–0.66, P = 0.033). The agreement analysis shows a similar result (intraclass correlation coefficient [ICC] = 0.28). The intra‐ and interobserver agreement analysis showed a better agreement when using 3D‐WMT.Conclusions: This is the first study that reports the reference indexed right atrial volume values by means of 2D‐echo and 3D‐echo in healthy population. 3D‐WMT is a feasible and reproducible method to determine right atrial volume.

This publication has 18 references indexed in Scilit: