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晕厥是儿童时期常见病症[1],据美国流行病学调查发现,其发病率呈上升趋势。20世纪50年代为71.9/10万,到20世纪80年代末90年代初则上升为125.8/10万。有20%～25%的男孩和40%～50%的女孩至少经历过一次晕
Syncope is a common childhood illness [1], according to the United States epidemiological survey found that the incidence was on the rise. It was 71.9 / 100,000 in the 1950s and 125.8 / 100,000 in the late 1980s and early 1990s. Between 20% and 25% of boys and 40% to 50% of girls experience at least one dizziness