40岁的张女士周末去逛商场,正好赶上换季打折,各种促销折扣商品让张女士眼花缭乱,心花怒放。商场逛了一家又一家,衣服买了一件又一件,可还没等到她带着胜利的喜悦满载而归,就觉得自己在人声嘈杂之中渐渐地有些头晕,慢慢地竟然开如何恶心、心慌、胸闷、心烦。张女士来不及多想,赶快走出熙熙攘攘的商场,到步行街边的长椅上坐下来,过了好一会儿,才有了些好转。这是怎么回事呢? 40-year-old Ms. Zhang went to the weekend shopping malls, just in time for seasonal discounts, discount promotions for a variety of goods Miss Zhang dazzled, elated. Shopping around one after another, the clothes bought one after another, may not wait until she was filled with the joy of victory, I feel myself in the noisy gradually getting a little dizzy, and even open how disgusting, Flustered, chest tightness, upset. Too late to think about Ms. Zhang, hurry out of the bustling shopping malls, pedestrians walking to the sidewalk to sit down, and after a while, only some improvement. What is going on?