Acute coronary syndrome on non-electrocardiogram-gated contrast-enhanced computed tomography

Figure 12 Non-electrocardiogram-gated contrast-enhanced computed tomography images in postinfarct cardiac free wall rupture. A: An 81-year-old man with syncope first underwent non-electrocardiogram (ECG)-gated non-contrast whole body computed tomography (CT), and moderate pericardial effusion was found. The attenuation value of the pericardial effusion was about 50 Hounsfield units. Subsequently, non-ECG-gated contrast-enhanced CT (CECT) was performed in search of ascending aortic dissection. Axial (B), short axis (C), and horizontal long axis (D) reformatted non-ECG-gated CECT images acquired 120 s after contrast injection showed decreased myocardial enhancement in the basal to mid lateral wall of the left ventricle (arrowheads) and a small myocardial defect (arrow).