Non-contrast cardiac CT and coronary CT angiography were performed using a 256-slice CT scanner (Brilliance iCT; Philips Healthcare, Best, The Netherlands). Prior to CT, participants were given 50 to 75 mg of metoprolol orally if heart rate was >60 beats/min, and 0.4 mg of nitroglycerin sublingually unless contraindicated.
Non-contrast cardiac CT was performed for coronary calcium scoring and EF evaluation using the following parameters: slice thickness 2.5 mm, matrix 512 × 512, field-of-view 250 mm, scan voltage 120 kV and prospective electrocardiographic-gating. CT angiography was performed for coronary plaque analysis using 370 mg/mL of iopamidol (Bracco Imaging, Milan, Italy) at a flow rate of 5 mL/s. Images were reconstructed using a hybrid iterative reconstruction algorithm (Philips iDose; Philips Healthcare, level 3).
Non-contrast cardiac CT was performed for coronary calcium scoring and EF evaluation using the following parameters: slice thickness 2.5 mm, matrix 512 × 512, field-of-view 250 mm, scan voltage 120 kV and prospective electrocardiographic-gating. CT angiography was performed for coronary plaque analysis using 370 mg/mL of iopamidol (Bracco Imaging, Milan, Italy) at a flow rate of 5 mL/s. Images were reconstructed using a hybrid iterative reconstruction algorithm (Philips iDose; Philips Healthcare, level 3).
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