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Journal of Computer Assisted Tomography:
doi: 10.1097/RCT.0b013e3182a75fbe
Cardiovascular Imaging

Evaluation of the Cardiac Chambers on Axial CT: Comparison With Echocardiography

Ramanathan, Rohit MD*; Anumandla, Anil K. MD; Haramati, Linda B. MD, MS*‡; Spevack, Daniel M. MD, MS; Godelman, Alla MD*; Jain, Vineet R. MD*; Kazam, Jacob MD*; Burton, William B. PhD§; Levsky, Jeffrey M. MD, PhD*

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Abstract

Objective

To evaluate qualitative and simple quantitative measures of all 4 cardiac chamber sizes on computed tomography (CT) in comparison with transthoracic echocardiography (TTE).

Methods

We retrospectively identified 104 adults with electrocardiographically gated cardiac CT and TTE within 3 months. Axial early diastolic (75% R-R) CT images were reviewed for qualitative chamber enlargement, and each chamber was measured linearly. Transthoracic echocardiography was reviewed for linear, area, and volume measurements. Interrater agreement was calculated using Cohen κ and Pearson correlation.

Results

There were significant correlations between linear left atrium and left ventricle sizes by CT and TTE (r = 0.686 and r = 0.709, respectively). Correlations for right atrium and right ventricle measurements were lower (r = 0.447 and r = 0.492, respectively). Agreement between CT and TTE for qualitative chamber enlargement was poor (highest κ = 0.35). Computed tomography sensitivity was ≤ 62% for enlargement of all chambers.

Conclusions

Linear CT measurements of left-sided chamber sizes correlate well with TTE. Right heart measurements and qualitative assessments agreed poorly with TTE.

Copyright © 2014 by Lippincott Williams & Wilkins

 

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