摘要In healthy subjects,changes in posture are accompanied by autoregulatory mechanisms that ensure the relatively small fluctuations of blood pressure (BP).Orthostatic hypotension (OH) is well-recognized as a risk factor for falls,syncope,and cardiovascular events) Although OH is commonly encountered,orthostatic hypertension (OHT),with a marked increase in BP upon standing,has not been frequently reported.2-4 In the clinic,it is generally both unexpected and counterintuitive.However,sometimes,OHT can be dramatic and persistent.Studies in recent years have shown that OHT is a new cardiovascular risk factor.3,5,6 However,till date,most studies only focused on adults and aged patients;there were very few reports in children.Therefore,appreciation of the true incidence of OHT,elucidation of the underlying pathophysiology,and understanding of the potentially effective treatment approaches,associated risks,and benefits,might be significant in children.