Key result
Linear CT measurements of left-sided chamber sizes correlated well with TTE (r=0.686 for LA, r=0.709 for LV), whereas right heart measurements and qualitative assessments agreed poorly.
Why the study?
Do qualitative and quantitative measures of cardiac chamber sizes on axial CT correlate with transthoracic echocardiography in adults?
Observational (n=104)
Do qualitative and quantitative measures of cardiac chamber sizes on axial CT correlate with transthoracic echocardiography in adults?
Linear CT measurements of left-sided cardiac chambers correlate well with TTE, but qualitative assessments and right-sided measurements show poor agreement.
Answers are grounded in this paper and cite their sources.
May support adjunctive linear left-chamber CT measures with TTE; leaves open reliability of right-sided and qualitative assessments.
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.
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Ramanathan et al. (2013) reported an observational. Computed tomography (CT) vs. Transthoracic echocardiography (TTE) was evaluated on Correlation of linear cardiac chamber sizes between CT and TTE (r = 0.686 (LA) and r = 0.709 (LV)). Linear CT measurements of left-sided chamber sizes correlated well with TTE (r=0.686 for LA, r=0.709 for LV), whereas right heart measurements and qualitative assessments agreed poorly.
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