I had one in March, and the Nurse who did it told me that the results would be e-mailed to my Doctor, and if there was anything he needed to speak to me about then he would ring me. I never got a phone call. It seemed to be over in seconds.
Shirt, Shoes and socks off. Trouser legs rolled up a bit, and try not to sweat because the sensor pads don't stick too well if you do, and breathe normally.