Chest x-ray can show mediastinal widening and/or an abnormal aortic contour. Computed tomography (CT) is the definitive diagnostic modality and has a sensitivity approaching 100%. Transesophageal ...

Type I: Dissection originating in the ascending aorta extending a variable length frequently into the aortic arch ... Chest x-ray can show mediastinal widening and/or an abnormal aortic contour.