I am FURIOUS!!! Can they do this to us?

Yesterday my husband and I were out shopping. We went into a store, when suddenly my husband starts to have a panic/anxiety attack He sits down, and i'm trying to help him get his breathing back when a store clerk comes and asks what's wrong, I tell him we are fine and he'll be over it soon. A few minutes later, another man (presumably the manager) turns up and asks us to leave. I tell this guy whats happening and that we will leave in a minute, but I can't move him now because the stress could bring on a seizure. By this time, my husband is freezing, shaky and has worked himself up so much he's wet himself. Seeing this, the 'manager' tells us to leave immediately or security will get involved. (Before making some comment about 'ruining' this display chair?!?) So I half drag, half carry him out the store and on to the pavement outside. At first I though he had ped out, he kind of 'flopped' and then went into a seizure. So I put my bag under his head and start to look around for help. NOBODY STOPS. Given it was late, and only 5 or so people were around, nobody offers to help. I grab a woman and demand she call an ambulance. The first store clerk comes out to poke his nose in and I tell him to get some towels or blankets. He doesn't return! So. I'm asking. Do they have a right to throw us out the store in a situation like this?