Sounds like she had a panic attack. They can be triggered by lots of things (each person will have their own trigger). I have had a few and breathing exercises are the best thing. When your body is in a state of panic it brings all the blood to the heart, quickens your breathing and tries to make you faint so you can reset. Its the flight or fight response - just acting against a different stressor (i.e. not a lion!). I was sent to A&E too, apparently it's quite common.
I was going through an emotional period of my life and it was my bodys way of coping. I took time off work and saw a counsellor. What does she do to relax? i used to travel and walk a lot so a walk with my mum would have given my relief. You could suggest going for afternoon tea, a walk round a park, a pottery painting session... is she the type to enjoy pampering? You could make her a pamper hamper and offer to have any kids so she has time alone. There's lots of options... just think about what makes her happy and if its healthy encourage her to do more of that.
What is you oldest item of clothing, handbags or shoes ?
