What physical examination finding is often associated with aortic dissection?

Aortic dissection is characterized by a tear in the aortic intima, leading to the separation of the layers of the aortic wall. One significant physical examination finding associated with this condition is a difference in blood pressure between the arms. This occurs because the dissection can affect the blood vessels that supply each arm differently. In particular, if the dissection extends into the arteries that supply the arms, one arm may receive less blood flow, resulting in a lower blood pressure compared to the other arm.

Identifying differences in blood pressure between the arms can therefore serve as a critical clue in diagnosing aortic dissection. This finding is important for clinicians, as it can guide further imaging studies and management for a condition that is potentially life-threatening. The presence of this differential blood pressure highlights the need for careful cardiovascular assessment in patients suspected of having an aortic dissection.