"The aorta is like a braided hose. An inner layer, a fibrous reinforcing layer and an outer layer.

Like a braided hose, if fluid leaks between the inner and middle layer the pressure will peel in inner layer off the braid.

The inner layer can collapse into the flow path, cutting off circulation, causing everything below that point to fail due to lack of blood flow.

Spikes and sudden drops in blood pressure could cause her to pass out.

And oh, by the way, the blood can low leak past the fibrous reinforcing layer and rupture her aorta. She'll be dead in seconds if this happens."