Out shopping with daughter we called into Coffee House for a chatty time. Half through just felt so dizzy and light headed. Did walkabouts for the toilets. When I came back daughter asked what is the matter explained situation to hear. Sound advice from her - she had to have a pacemaker fitted when she was 30yrs. The same type of sensation use to happen to her she said the best thing is to keep your legs and feet moving whilst sat down - helps the blood to start moving again. Anyone else heard of this??