Why is it important to compare bilateral blood pressure readings?

Comparing bilateral blood pressure readings is crucial primarily because it helps detect possible vascular issues or conditions such as aortic dissection. In a normal scenario, blood pressure should be similar in both arms. However, significant differences may indicate underlying pathologies, such as narrowing of the arteries (stenosis) or vascular occlusion in one arm, which could be symptomatic of serious conditions like an aortic dissection. This condition involves a tear in the aorta, leading to potentially life-threatening complications, making it critical for healthcare professionals to monitor and compare readings. Timely recognition of these differences can guide further diagnostic testing and appropriate interventions to address any vascular concerns promptly.