In the Stanford classification, which type refers to aortic dissection affecting the ascending aorta?

In the Stanford classification of aortic dissections, Type A is characterized by the involvement of the ascending aorta. This classification is crucial for determining the management and treatment strategies for aortic dissection because Type A dissections are typically associated with a higher risk of complications, such as aortic rupture or cardiac tamponade, due to their proximity to the heart.

In this type of dissection, the tear occurs in the intimal layer of the aorta and can propagate along the aorta, potentially involving the arch and descending aorta as well. Type A dissections often require surgical intervention, whereas Type B dissections, which involve only the descending thoracic aorta, are usually managed medically unless there are complications. Understanding these differences is vital in the context of emergency care, as it guides clinicians in making decisions about urgent surgical evaluations and interventions.