Abstract
Objectives: To compare the results of the evaluation of left ventricular function on a 128-slice coronary CT with 2D echocardiography and to verify the correlation and consensus between two techniques.
Methods: The study was conducted in 32 patients with indications of coronary angiography, in which patients were subjected to 128-slice coronary CT with gated ECG according to hospital procedures. Then from the imaging data, the endothelial border will be drawn automatically and the left ventricular chamber will be reconstructed with the software available on the machine, thereby calculating the LV end-systolic volume, LV end-diastolic volume as well as LV ejection fraction. The patient also had an echocardiography the same day. The results between the two techniques will be compared with statistical analysis of the t-test to find the difference. The correlation of the two techniques will be evaluated with Pearson or Spearman correlation analysis as well as through the Bland Altman chart to evaluate the consensus. Statistical significance level in the study was applied with p<0.05.
Results: On a 128-slice coronary CT scan, the mean end-diastolic ejection volume was 131.7 ± 19.6ml, the end-diastolic volume was 48.8 ± 8.5ml and the mean ejection fraction was 62.9 ± 3. 2%. There was a strong correlation between the results measured by the two techniques with the correlation coefficient (rho) of enddiastolic volume, end-systolic volume, and ejection fraction of 0.862; 0.800 and 0.781, respectively (p<0.001). The Bland-Altman diagram shows the consensus of the result LV ejection fraction between two methods.
Conclusion: 128-slice coronary CT can be a useful tool to evaluate left ventricular systolic function in patients with indications for coronary angiography.