BACKGROUND: Left atrial (LA) size has incremental value in risk stratification. OBJECTIVES: We aimed to assess feasibility and reproducibility of 2 quick measures of LA size by chest CT (axial LA area and LA anteroposterior [AP] diameter) by using contrast-enhanced and CT scans. METHODS: We measured LA size in 100 contrast-enhanced 64-slice multidetector CT (MDCT) scans (randomly selected from the ROMICAT collective) by (1) axial LA area at the level of the left ventricular outflow tract and the mitral valve leaflets, (2) AP diameter in 3-chamber view, and (3) 3-dimensional (3D) LA volume by Simpson's methods. We assessed interobserver and intraobserver intraclass correlation coefficient (ICC) for axial LA area and AP diameter as well as their correlation to 3D LA volume. For axial area, feasibility and reproducibility were also determined in 100 non-contrast MDCT scans, randomly selected from the Framingham Heart Offspring collective. RESULTS: In contrast-enhanced CT, both LA axial area and AP diameter had excellent reproducibility (interobserver: axial area: ICC, 0.96, mean relative difference, 2.4% +/- 7.4%; AP diameter: ICC, 0.91, 3.6% +/- 7.2%; intraobserver: axial area: ICC, 0.99, 0.4% +/- 5.2%; AP diameter: ICC, 0.94, 1.7% +/- 5.5%). Correlations with 3D volume were better for axial area (r=0.88) than for AP diameter (r=0.67). In non-contrast images, axial area could be assessed with excellent reproducibility (interobserver: ICC, 0.96, 0.5% +/- 8.3%; intraobserver: ICC, 0.99, 0.01% +/- 4.4%). CONCLUSION: Both AP diameter and axial LA area permit quick and reproducible estimates of LA volume in contrast-enhanced and non-contrast electrocardiographic-gated chest CT. However, LA area should be used preferably over AP diameter because of its better agreement to 3D LA volume. 2010 Society of Cardiovascular Computed Tomography. All rights reserved.
BACKGROUND:Left atrial (LA) size has incremental value in risk stratification. OBJECTIVES: We aimed to assess feasibility and reproducibility of 2 quick measures of LA size by chest CT (axial LA area and LA anteroposterior [AP] diameter) by using contrast-enhanced and CT scans. METHODS: We measured LA size in 100 contrast-enhanced 64-slice multidetector CT (MDCT) scans (randomly selected from the ROMICAT collective) by (1) axial LA area at the level of the left ventricular outflow tract and the mitral valve leaflets, (2) AP diameter in 3-chamber view, and (3) 3-dimensional (3D) LA volume by Simpson's methods. We assessed interobserver and intraobserver intraclass correlation coefficient (ICC) for axial LA area and AP diameter as well as their correlation to 3D LA volume. For axial area, feasibility and reproducibility were also determined in 100 non-contrast MDCT scans, randomly selected from the Framingham Heart Offspring collective. RESULTS: In contrast-enhanced CT, both LA axial area and AP diameter had excellent reproducibility (interobserver: axial area: ICC, 0.96, mean relative difference, 2.4% +/- 7.4%; AP diameter: ICC, 0.91, 3.6% +/- 7.2%; intraobserver: axial area: ICC, 0.99, 0.4% +/- 5.2%; AP diameter: ICC, 0.94, 1.7% +/- 5.5%). Correlations with 3D volume were better for axial area (r=0.88) than for AP diameter (r=0.67). In non-contrast images, axial area could be assessed with excellent reproducibility (interobserver: ICC, 0.96, 0.5% +/- 8.3%; intraobserver: ICC, 0.99, 0.01% +/- 4.4%). CONCLUSION: Both AP diameter and axial LA area permit quick and reproducible estimates of LA volume in contrast-enhanced and non-contrast electrocardiographic-gated chest CT. However, LA area should be used preferably over AP diameter because of its better agreement to 3D LA volume. 2010 Society of Cardiovascular Computed Tomography. All rights reserved.
Authors: Roberto M Lang; Michelle Bierig; Richard B Devereux; Frank A Flachskampf; Elyse Foster; Patricia A Pellikka; Michael H Picard; Mary J Roman; James Seward; Jack S Shanewise; Scott D Solomon; Kirk T Spencer; Martin St John Sutton; William J Stewart Journal: J Am Soc Echocardiogr Date: 2005-12 Impact factor: 5.251
Authors: Prasad V Maddukuri; Marcelo L C Vieira; Stefano DeCastro; Martin S Maron; Jeffrey T Kuvin; Ayan R Patel; Natesa G Pandian Journal: J Am Soc Echocardiogr Date: 2006-08 Impact factor: 5.251
Authors: Jorge R Kizer; Jonathan N Bella; Vittorio Palmieri; Jennifer E Liu; Lyle G Best; Elisa T Lee; Mary J Roman; Richard B Devereux Journal: Am Heart J Date: 2006-02 Impact factor: 4.749
Authors: Udo Hoffmann; Fabian Bamberg; Claudia U Chae; John H Nichols; Ian S Rogers; Sujith K Seneviratne; Quynh A Truong; Ricardo C Cury; Suhny Abbara; Michael D Shapiro; Jamaluddin Moloo; Javed Butler; Maros Ferencik; Hang Lee; Ik-Kyung Jang; Blair A Parry; David F Brown; James E Udelson; Stephan Achenbach; Thomas J Brady; John T Nagurney Journal: J Am Coll Cardiol Date: 2009-05-05 Impact factor: 24.094
Authors: Luc Christiaens; Benoît Lequeux; Paul Ardilouze; Stephanie Ragot; Jean Mergy; Daniel Herpin; Benjamin Bonnet; Joseph Allal Journal: Int J Cardiol Date: 2008-01-04 Impact factor: 4.164
Authors: Teresa S M Tsang; Walter P Abhayaratna; Marion E Barnes; Yoko Miyasaka; Bernard J Gersh; Kent R Bailey; Stephen S Cha; James B Seward Journal: J Am Coll Cardiol Date: 2006-02-09 Impact factor: 24.094
Authors: Ahmed A Alsaileek; Martin Osranek; Kaniz Fatema; Robert B McCully; Teresa S Tsang; James B Seward Journal: J Am Coll Cardiol Date: 2006-02-09 Impact factor: 24.094
Authors: Amir A Mahabadi; Bharat Samy; Sujith K Seneviratne; Michael H Toepker; Fabian Bamberg; Udo Hoffmann; Quynh A Truong Journal: J Cardiovasc Comput Tomogr Date: 2009-02-14