CTICasesType A Aortic Dissection on CT Pulmonary Angiography
Imaging findings
CT pulmonary angiogram (CTPA) shows severe aortic root dilation and a subtle, non-opacified false lumen in the ascending aorta, with a lack of contrast opacification in the left heart chambers.
Key takeaways
Standard CTPA protocols are timed to maximize contrast opacification in the right heart and pulmonary arteries. Consequently, the left heart and aorta are poorly opacified (unenhanced), which can easily mask an acute Stanford Type A aortic dissection. Left atrial or systemic arterial bolus tracking is required if aortic pathology is clinically suspected.
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