摘要本指南修订是结合近年来在儿童自主神经介导性晕厥(NMS)领域的研究进展，对《2018 CPCS儿童青少年晕厥诊断与治疗指南》做出的及时更新。在儿童NMS相关疾病谱和诊断方面，增加了部分体位试验，引入了坐位性心动过速综合征、坐位性高血压新概念，强调了共患病的诊断及评估。临床诊断儿童青少年NMS需结合详细询问病史、仔细体格检查、正确解读体位试验结果和全面评估共患病。治疗方面，针对非药物治疗给出了详细的建议，强调生物标志物指导个体化治疗及共患病的管理。修订的指南还对NMS的随访和疗效评估提出了具体建议。

abstractsThis revised guideline incorporates recent advances in neurally mediated syncope (NMS) in children, providing a timely update to the " 2018 CPCS Guidelines for Diagnosis and Treatment of Syncope in Children and Adolescents" . In the spectrum of NMS-related disorders and diagnosis, this revision includes additional postural tests, introduces the new concept of sitting tachycardia syndrome and sitting hypertension, and emphasizes the diagnosis and assessment of comorbidities.The clinical diagnosis of NMS in children and adolescents requires a combination of detailed history taking, thorough physical examination, correct interpretation of postural tests results, and comprehensive assessment of comorbidities.In terms of treatment, detailed recommendations are given for non-pharmacological therapy, emphasizing the use of biomarkers to guide individualized treatment and the management of comorbidities.The revised guideline also provides specific recommendations for follow-up and outcome assessment of NMS in children and adolescents.