children with autonomic nervous mediated syncope have seriously affects children's physical and mental health and quality of life, and the incidence rate is also increasing year by year. But the current treatment measures are not ideal, Therefore, we need to look for new biological indicators, according to different biological indicators to develop different treatment options, so as to improve the current situation of poor treatment of children with NMS
children ; autonomic nervous mediated syncope； vitamin D ; symptom score ; renin-angiotensin-aldosterone-system