DATASET RELATED TO THE ARTICLE "Interpretability of coronary CT angiography performed with a novel whole-heart coverage high-definition CT scanner in 300 consecutive patients with coronary artery bypass grafts"

This record contains raw data related to the article: Interpretability of coronary CT angiography performed with a novel wholeheart

coverage high-definition CT scanner in 300 consecutive patients with

coronary artery bypass grafts'

Aims: Coronary CT angiography (CCTA) is an accurate non-invasive tool for the evaluation of coronary artery

bypass graft (CABG). However, inability to sustain a long breath-hold, high heart rate (HR) and atrial fibrillation

may affect image quality. Moreover, radiation exposure is still a matter of some concern. A scanner combining

0.23-mm spatial resolution, new iterative reconstruction and fast gantry rotation time has been recently introduced

in the clinical field. The aims of our study were to evaluate interpretability, radiation exposure and

diagnostic accuracy of CCTA performed with the latest generation of cardiac-CT scanners compared to invasive

coronary angiography (ICA) in the assessment of bypass grafts, and non-grafted and post-anastomotic native

coronary arteries.

Methods and results: We prospectively enrolled 300 patients undergoing clinically indicated CCTA with a 16-cm

z-axis coverage, 256-detector rows, and 0.28-sec gantry rotation time scanner. Coronary artery and graft interpretability,

image quality and effective dose (ED) were assessed in all patients and diagnostic accuracy was

evaluated in a subgroup of 100 patients who underwent ICA.

Mean HR during the scan was 69.6 ± 10.8. Sinus rhythm was present in 118 patients with HR < 75 bpm

and in 112 patients with HR≥75 bpm, while 70 patients had atrial fibrillation. CABG interpretability was

100%. Compared to ICA, CCTA was able to correctly detecting occlusions or significant stenoses of all CABG

segments. Overall interpretability of native coronary segments was 95.6%. Sensitivity, specificity, positive

predictive value, negative predictive value and accuracy of coronary arteries were 98.3%, 97.4%, 93.1%, 99.3%

and 96.5%, respectively. The diagnostic accuracy in a patient based analysis was 95.2%. Mean ED was

3.14 ± 1.7 mSv.

Conclusions: The novel whole-heart coverage CT scanner allows to evaluating CABG and native coronary arteries

with excellent interpretability and low radiation exposure even in the presence of unfavorable heart rhythm.