Aortic Dissection
A tear in the aortic intima lets high-pressure blood force its way into the vessel wall, splitting it along its length to create a false lumen that can obstruct branch arteries, rupture, or compromise the aortic valve, so the priority is same-hour imaging and blood pressure control, not analgesia alone.
First principles
A tear lets pressure split the wall along its length
Chronic hypertension, connective tissue disease such as Marfan or Ehlers-Danlos syndrome, or a bicuspid aortic valve weaken and degenerate the aortic media over time. An intimal tear, often at a point of high shear stress such as the aortic root or just distal to the left subclavian artery, allows pulsatile arterial pressure to force blood between the layers of the wall. This propagates a false lumen along the aorta, extending proximally, distally, or both, depending on where the tear begins.
Educational content pending clinical review. Not medical advice.